Invokamet XR Product Monograph

RECENT MAJOR LABEL CHANGES

TABLE OF CONTENTS

Sections or subsections that are not applicable at the time of authorization are not listed.

RECENT MAJOR LABEL CHANGES .............................................................................. 2

TABLE OF CONTENTS .................................................................................................... 2

PART I: HEALTH PROFESSIONAL INFORMATION ..................................................... 5

1 INDICATIONS ......................................................................................................... 5

1.1 Pediatrics .................................................................................................................. 5

1.2 Geriatrics .................................................................................................................. 5

2 CONTRAINDICATIONS ......................................................................................... 5

3 SERIOUS WARNINGS AND PRECAUTIONS BOX ............................................. 7

4 DOSAGE AND ADMINISTRATION ....................................................................... 8

4.1 Dosing Considerations ............................................................................................. 8

4.2 Recommended Dose and Dosage Adjustment ........................................................ 8

4.4 Administration ......................................................................................................... 9

4.5 Missed Dose ............................................................................................................. 9

5 OVERDOSAGE ....................................................................................................... 9

6 DOSAGE FORMS, STRENGTHS, COMPOSITION AND PACKAGING ........... 10

7 WARNINGS AND PRECAUTIONS ...................................................................... 11

7.1 Special Populations ................................................................................................ 19

7.1.1 Pregnant Women ................................................................................................ 19

7.1.2 Breast-feeding .................................................................................................... 20

7.1.3 Pediatrics ............................................................................................................ 20

7.1.4 Geriatrics ............................................................................................................ 20

8 ADVERSE REACTIONS ...................................................................................... 21

8.1 Adverse Reaction Overview ................................................................................... 21

8.2 Clinical Trial Adverse Reactions ............................................................................. 22

8.3 Less Common Clinical Trial Adverse Reactions ...................................................... 28

8.4 Abnormal Laboratory Findings: Hematologic, Clinical Chemistry and Other Quantitative Data ............................................................................................................. 34

8.5 Post-Market Adverse Reactions ............................................................................. 37

9 DRUG INTERACTIONS ....................................................................................... 37

9.2 Drug Interactions Overview ................................................................................... 37

9.3 Drug-Behavioural Interactions ............................................................................... 38

9.4 Drug-Drug Interactions .......................................................................................... 38

9.5 Drug-Food Interactions .......................................................................................... 42

9.6 Drug-Herb Interactions .......................................................................................... 42

9.7 Drug-Laboratory Interactions ................................................................................ 42

10 CLINICAL PHARMACOLOGY ............................................................................. 43

10.1 Mechanism of Action ....................................................................................... 43

10.2 Pharmacodynamics .......................................................................................... 43

10.3 Pharmacokinetics ............................................................................................. 45

11 STORAGE, STABILITY AND DISPOSAL ........................................................... 50

12 SPECIAL HANDLING INSTRUCTIONS .............................................................. 50

PART II: SCIENTIFIC INFORMATION ........................................................................... 51

13 PHARMACEUTICAL INFORMATION ................................................................. 51

14 CLINICAL TRIALS ............................................................................................... 52

14.1 Clinical Trial by Indication ................................................................................ 52

Type 2 Diabetes Mellitus ............................................................................................. 52

15 MICROBIOLOGY .................................................................................................. 66

16 NON-CLINICAL TOXICOLOGY ........................................................................... 66

PATIENT MEDICATION INFORMATION ....................................................................... 70

What is INVOKAMET XR used for? ................................................................................... 71

How does INVOKAMET XR work? .................................................................................... 72

What are the ingredients in INVOKAMET XR? ................................................................. 72

INVOKAMET XR comes in the following dosage forms: ................................................... 72

Do not use INVOKAMET XR if you: ................................................................................... 72

To help avoid side effects and ensure proper use, talk to your healthcare professional before you take INVOKAMET XR. Talk about any health conditions or problems you may have, including if you: ...................................................................................................... 73

Other warnings you should know about: ........................................................................ 74

The following may interact with INVOKAMET XR: ........................................................... 74

How to take INVOKAMET XR: .......................................................................................... 75

Overdose: ......................................................................................................................... 75

Missed Dose: .................................................................................................................... 76

What are possible side effects from using INVOKAMET XR? .......................................... 76

Storage: ............................................................................................................................ 79

If you want more information about INVOKAMET XR: .................................................... 80

PART I: HEALTH PROFESSIONAL INFORMATION

1 INDICATIONS

Note: for additional information on canagliflozin and metformin hydrochloride, consult the individual Product Monographs.

INVOKAMET XR^® (canagliflozin/metformin hydrochloride) is indicated to improve glycemic control as an adjunct to diet and exercise in adult patients with type 2 diabetes mellitus inadequately controlled on:

• metformin
• a sulfonylurea in combination with metformin
• pioglitazone in combination with metformin
• insulin in combination with metformin

Or in patients already being treated and achieving glycemic control with:

• metformin and canagliflozin as separate tablets
• a sulfonylurea in combination with metformin and canagliflozin as separate tablets
• pioglitazone in combination with metformin and canagliflozin as separate tablets
• insulin in combination with metformin and canagliflozin as separate tablets

1.1 Pediatrics

The safety and efficacy of INVOKAMET XR in pediatric patients under 18 years of age have not been established; therefore, Health Canada has not authorized an indication for pediatric use.

1.2 Geriatrics

INVOKAMET XR should be used with caution in geriatric patients. Patients 65 years and older had a higher incidence of adverse reactions related to reduced intravascular volume with canagliflozin, including hypotension, postural dizziness, orthostatic hypotension, syncope, and dehydration. Reactions were more common in patients over 75 years of age and with the canagliflozin 300 mg daily dose (see 7.1.4 Geriatrics, 8 ADVERSE REACTIONS, Elderly Patients and 4.2 Recommended Dose and Dosage Adjustment). Smaller reductions in HbA1c with canagliflozin relative to placebo were seen in patients 65 years and older, compared to younger patients (see 7.1 Special Populations). Treatment with INVOKAMET XR can reduce renal function. Metformin is eliminated by the kidney, and the risk of serious adverse reactions to the drug is greater in patients with impaired renal function. The dosage of INVOKAMET XR should be adjusted based on renal function. Regular assessment of renal function is necessary (see 7 WARNINGS AND PRECAUTIONS, 4 DOSAGE AND ADMINISTRATION and 10.3 Pharmacokinetics).

2 CONTRAINDICATIONS

• Known hypersensitivity to canagliflozin or metformin or to any ingredient in the formulation or component of the container. For a complete listing, see 6 DOSAGE FORMS, STRENGTHS, COMPOSITION AND PACKAGING

• Serum creatinine levels above the upper limit of normal range or when renal function is not known, renal disease or renal dysfunction, e.g., as suggested by serum creatinine levels ≥ 136 μmol/L (males), ≥ 124 μmol/L (females), or abnormal creatinine clearance

  • (< 60 mL/min), which may result from conditions such as cardiovascular collapse (shock), acute myocardial infarction, and septicemia (see 7 WARNINGS AND PRECAUTIONS, Renal).
• Acute or chronic metabolic acidosis, including diabetic ketoacidosis, with or without coma, history of ketoacidosis with or without coma, history of lactic acidosis, irrespective of precipitating factors (see 3 CONTRAINDICATIONS and 7 WARNINGS AND PRECAUTIONS, Endocrine and Metabolism).
• Unstable and/or insulin-dependent (Type I) diabetes mellitus.
• Excessive alcohol intake, acute or chronic.
• Severe hepatic dysfunction, since severe hepatic dysfunction has been associated with some cases of lactic acidosis, INVOKAMET XR should not be used in patients with clinical or laboratory evidence of hepatic disease (see 7 WARNINGS AND PRECAUTIONS, Hepatic/Biliary/Pancreatic).
• Cardiovascular collapse and in disease states associated with hypoxemia such as cardiorespiratory insufficiency, which are often associated with hyperlactacidemia.
• Stress conditions, such as severe infections, trauma or surgery and the recovery phase thereafter.
• Severe dehydration.
• During pregnancy and breastfeeding (see 7.1 Special Populations).
• Period around administration of iodinated contrast materials, because the use of such products may result in acute alteration of renal function (see 7 WARNINGS AND PRECAUTIONS, Renal).

3 SERIOUS WARNINGS AND PRECAUTIONS BOX

Serious Warnings and Precautions

4 DOSAGE AND ADMINISTRATION

4.1 Dosing Considerations

Concomitant Use with Insulin or an Insulin Secretagogue (e.g., Sulfonylurea): When INVOKAMET XR is used as add-on therapy with insulin or an insulin secretagogue (e.g., sulfonylurea), a lower dose of insulin or the insulin secretagogue may be considered to reduce the risk of hypoglycemia (see 7 WARNINGS AND PRECAUTIONS, Endocrine and Metabolism and 8 ADVERSE REACTIONS).

INVOKAMET XR is not recommended for use in patients on loop diuretics (7 WARNINGS AND PRECAUTIONS, Cardiovascular).

4.2 Recommended Dose and Dosage Adjustment

The dosage of INVOKAMET XR should be individualized on the basis of both effectiveness and tolerability, while not exceeding the maximum recommended dose of 300 mg canagliflozin/2000 mg metformin hydrochloride daily. Dose escalation should be gradual to reduce the gastrointestinal side effects associated with metformin use.

• In patients on metformin (alone or in combination with a sulfonylurea, pioglitazone, or insulin), switch to two INVOKAMET XR tablets containing canagliflozin 50 mg with a similar total daily dose of metformin;
• In patients already treated with canagliflozin and metformin (alone or in combination with a sulfonylurea, pioglitazone, or insulin), switch to two INVOKAMET XR tablets containing the same total daily doses of each component.
• In patients with evidence of reduced intravascular volume, this condition should be corrected prior to initiation of INVOKAMET XR.

For patients who are tolerating two tablets of INVOKAMET XR containing 50 mg canagliflozin taken once daily who have an eGFR ≥ 60 mL/min/1.73 m², who need tighter glycemic control and who have a low risk of adverse reactions associated with reduced intravascular volume, the dose can be increased to two tablets of INVOKAMET XR containing 150 mg canagliflozin taken once daily (see 7 WARNINGS AND PRECAUTIONS, Cardiovascular).

In case of intolerance to INVOKAMET XR, discontinue INVOKAMET XR and patients must be switched back to individual doses of Canagliflozin and Metformin immediate release the day following the last dose of INVOKAMET XR.

Concomitant Use with UDP-Glucuronosyl Transferase (UGT) Enzyme Inducers: If an inducer of UGTs and drug transport systems (e.g., rifampin, phenytoin, barbituates, phenobarbitol, ritonavir, carbamazepine, efavirenz, St John’s wort [Hypericum perforatum]) is co-administered with INVOKAMET XR, monitor A1C and consider increasing the dose to two tablets of INVOKAMET XR containing canagliflozin 150 mg taken once daily in patients currently tolerating two tablets of INVOKAMET XR containing 50 mg canagliflozin taken once daily who have an eGFR ≥ 60 mL/min/1.73 m2 or CrCl ≥ 60 mL/min and require additional glycemic control. Consider another antihyperglycemic agent in patients with CrCl ≤ 60 mL/min.

Pediatrics (< 18 years of age)

The safety and efficacy of INVOKAMET XR have not been established in pediatric patients; therefore, Health Canada has not authorized an indication for pediatric use.

Geriatrics (≥ 65 years of age)

Due to the potential for decreased renal function in elderly subjects, regular assessment of renal function is necessary (see 7 WARNINGS AND PRECAUTIONS, Renal).

Renal function and risk of volume depletion should be taken into account (see 7 WARNINGS AND PRECAUTIONS and 8 ADVERSE REACTIONS). For those patients who are tolerating two tablets of INVOKAMET XR containing canagliflozin 50 mg taken once daily and who need tighter glycemic control, the dose can be increased to two tablets of INVOKAMET XR containing canagliflozin 150 mg taken once daily.

Renal Impairment

INVOKAMET XR is contraindicated in patients with renal failure or renal dysfunction e.g., serum creatinine levels ≥ 136 μmol/L (males), ≥ 124 μmol/L (females) or abnormal creatinine clearance (< 60 mL/min) (see 2 CONTRAINDICATIONS and 7 WARNINGS AND PRECAUTIONS, Renal).

No dose adjustment is needed in patients with mild renal impairment (eGFR of 60 mL/min/1.73 m² to < 90 mL/min/1.73 m² or greater).

Hepatic Impairment

INVOKAMET XR are contraindicated in patients with clinical or laboratory evidence of hepatic disease (see 2 CONTRAINDICATIONS). Metformin use in patients with impaired hepatic function has been associated with some cases of lactic acidosis (see 7 WARNINGS AND PRECAUTIONS, Hepatic/Biliary/Pancreatic).

4.4 Administration

Two INVOKAMET XR tablets should be taken orally once a day with a morning meal to reduce the risk of gastrointestinal side effects associated with metformin use. The two tablets should be taken one immediately after the other, swallowed whole and must not be split, broken, crushed or chewed.

4.5 Missed Dose

If a dose of INVOKAMET XR is missed, it should be taken as soon as the patient remembers unless it is almost time for the next dose in which case patients should skip the missed dose and take the medicine at the next regularly scheduled time.

5 OVERDOSAGE

There is no information available on overdose with INVOKAMET XR.

In the event of an overdose, contact the Poison Control Centre. It is also reasonable to employ the usual supportive measures, e.g., remove unabsorbed material from the gastrointestinal tract, employ clinical monitoring, and institute supportive treatment as dictated by the patient’s clinical status.

Canagliflozin

Single doses up to 1600 mg of canagliflozin in healthy subjects and canagliflozin 300 mg twice daily for 12 weeks in patients with type 2 diabetes were generally well-tolerated.

Canagliflozin was negligibly removed during a 4-hour hemodialysis session. Canagliflozin is not expected to be dialyzable by peritoneal dialysis.

Metformin hydrochloride

Available information concerning treatment of a massive overdosage of metformin hydrochloride is very limited. It would be expected that adverse reactions of a more intense character including epigastric discomfort, nausea and vomiting followed by diarrhea, drowsiness, weakness, dizziness, malaise and headache might be seen. Should those symptoms persist, lactic acidosis should be excluded. The drug should be discontinued, and proper supportive therapy instituted.

Overdose of metformin hydrochloride has occurred, including ingestion of amounts greater than 50 grams. Hypoglycemia was reported in approximately 10% of cases, but no causal association with metformin hydrochloride has been established. Lactic acidosis has been reported in approximately 32% of metformin overdose cases (see 7 WARNINGS AND PRECAUTIONS Endocrine and Metabolism and 7 WARNINGS AND PRECAUTIONS Lactic Acidosis). Metformin is dialyzable with a clearance of up to 170 mL/min under good hemodynamic conditions. Therefore, hemodialysis may be useful for removal of accumulated drug from patients in whom metformin overdosage is suspected.

6 DOSAGE FORMS, STRENGTHS, COMPOSITION AND PACKAGING

Table 1: Dosage Forms, Strengths, Composition and Packaging

INVOKAMET XR is supplied as film-coated tablets for oral administration. Each tablet strength contains canagliflozin drug substance as the hemihydrate equivalent to 50 mg or 150 mg of anhydrous canagliflozin, and metformin hydrochloride extended-release in quantities of 500 mg or 1000 mg. Tablet strengths are supplied in bottles of 60.

The available tablet strengths are listed below:

Table 2: INVOKAMET XR Tablet Strengths and Description

7 WARNINGS AND PRECAUTIONS

See 3 SERIOUS WARNINGS AND PRECAUTIONS BOX.

Cardiovascular

Canagliflozin

• Lower limb amputation

  An approximately 2-fold increased risk of lower limb amputations associated with canagliflozin use was observed in CANVAS and CANVAS-R, two large, randomized, placebo-controlled trials evaluating patients with type 2 diabetes who had either established cardiovascular disease or were at risk for cardiovascular disease. In CANVAS, canagliflozin-treated patients and placebo-treated patients had 5.9 and 2.8 amputations per 1000 patients per year, respectively. In CANVAS-R, canagliflozin-treated patients and placebo-treated patients had 7.5 and 4.2 amputations per 1000 patients per year, respectively. The risk of lower limb amputations was observed at both the 100 mg and 300 mg once daily dosage regimens. The amputation data for CANVAS and CANVAS-R are shown in Table 6 and Table 7, respectively (see 8 ADVERSE REACTIONS, Description of Selected Adverse Reactions).

  Amputations of the toe and midfoot (99 out of 140 patients with amputations receiving canagliflozin in the two trials) were the most frequent; however, amputations involving the leg, below and above the knee, were also observed (41 out of 140 patients with amputations receiving canagliflozin in the two trials). Some patients had multiple amputations, some involving both lower limbs. Lower limb infections, gangrene, and diabetic foot ulcers were the most common precipitating medical events leading to the need for an amputation. The risk of amputation was highest in patients with a baseline history of prior amputation, peripheral vascular disease, and neuropathy.

  Before initiating INVOKAMET XR, consider factors in the patient history that may predispose to the need for amputations, such as a history of prior amputation, peripheral vascular disease, neuropathy and diabetic foot ulcers. Counsel patients about the importance of routine preventative foot care and adequate hydration. Monitor patients receiving INVOKAMET XR for signs and symptoms of infection (including osteomyelitis), new pain or tenderness, sores or ulcers involving the lower limbs, and discontinue INVOKAMET XR if these complications occur.

• Reduced Intravascular Volume

  Due to its mechanism of action, canagliflozin increases urinary glucose excretion (UGE) and induces an osmotic diuresis, which may reduce intravascular volume.

  Patients most susceptible to adverse reactions related to reduced intravascular volume (e.g., postural dizziness, orthostatic hypotension, hypotension or renal failure) include patients with moderate renal impairment, elderly patients, patients on loop diuretics or medications that interfere with the renin-angiotensin-aldosterone system (e.g., angiotensin-converting-enzyme [ACE] inhibitors, angiotensin receptor blockers [ARBs]), and patients with low systolic blood pressure (see 8 ADVERSE REACTIONS, Description of Selected Adverse Reactions, 9 DRUG INTERACTIONS and 4 DOSAGE AND ADMINISTRATION). Before initiating INVOKAMET XR in patients with one or more of these characteristics, volume status should be assessed, and any volume depletion corrected. Caution should also be exercised in other patients for whom a drop in blood pressure could pose a risk, such as patients with known cardiovascular disease. Monitor for signs and symptoms after initiating therapy. Patients should be advised to report symptoms of reduced intravascular volume.

  In placebo-controlled clinical studies of canagliflozin, increases in adverse reactions related to reduced intravascular volume were seen more commonly with the 300 mg canagliflozin dose and occurred most frequently in the first three months (see 8 ADVERSE REACTIONS).

  INVOKAMET XR is not recommended for use in patients receiving loop diuretics (see 8 ADVERSE REACTIONS, Description of Selected Adverse Reactions and 4.1 Dosing Considerations) or who are volume depleted.

  In case of intercurrent conditions that may lead to volume depletion (such as a gastrointestinal illness), careful monitoring of volume status (e.g., physical examination, blood pressure measurements, laboratory tests including renal function tests), and serum electrolytes is recommended. In the case of volume depletion, temporary interruption of treatment with INVOKAMET XR may be considered until the condition is corrected, and more frequent glucose monitoring may be considered.

  Metformin hydrochloride

  • Hypoxic States

Cardiovascular collapse (shock) from whatever cause (e.g., acute congestive heart failure, acute myocardial infarction and other conditions characterized by hypoxemia) have been associated with lactic acidosis and may also cause prerenal azotemia. When such events occur in patients on INVOKAMET XR therapy, the drug should be promptly discontinued.

Driving and Operating Machinery

The effect of canagliflozin on the ability to drive and use machines has not been examined. However, patients should be alerted to the elevated risk of adverse reactions related to reduced intravascular volume, such as postural dizziness, and to the risk of hypoglycemia when INVOKAMET XR is used as add-on therapy with insulin or an insulin secretagogue (see 7 WARNINGS AND PRECAUTIONS, Cardiovascular and Endocrine and Metabolism, 8 ADVERSE REACTIONS and 4.1 Dosing Considerations).

Endocrine and Metabolism

Canagliflozin

• Diabetic ketoacidosis

  INVOKAMET XR should not be used in patients with type 1 diabetes. The diagnosis of T2DM should therefore be confirmed before initiating INVOKAMET XR.

  INVOKAMET XR is not indicated and should not be used for the treatment of DKA or in patients with a history of DKA.

  Clinical trial and post-market cases of DKA, a serious life-threatening condition requiring urgent hospitalization, have been reported in patients with type 2 diabetes mellitus treated with SGLT2 inhibitors, including canagliflozin. Fatal cases of DKA have been reported in patients taking canagliflozin. In a number of reported cases, the presentation of the condition was atypical with blood glucose values below 13.9 mmol/L (250 mg/dL) (see 8 ADVERSE REACTIONS, Description of Selected Adverse Reactions).

  Patients with type 2 diabetes treated with INVOKAMET XR who present with signs and symptoms consistent with severe metabolic acidosis should be assessed for ketoacidosis regardless of presenting blood glucose levels, as ketoacidosis associated with canagliflozin may be present even if blood glucose levels are < 13.9 mmol/L (250 mg/dL).

  The risk of DKA must be considered in the event of non-specific symptoms such as difficulty breathing, nausea, vomiting, abdominal pain, confusion, anorexia, excessive thirst and unusual fatigue or sleepiness.

  If these symptoms occur, regardless of blood glucose level, INVOKAMET XR treatment should be immediately discontinued, patients should be assessed for diabetic ketoacidosis immediately, and prompt treatment should be instituted.

  SGLT2 inhibitors have been shown to increase blood ketones in clinical trial subjects. Conditions that can precipitate DKA while taking INVOKAMET XR include patients on a very low carbohydrate diet (as the combination may further increase ketone body production), patients with conditions that lead to restricted food intake or severe dehydration, patients with increased insulin requirement due to an acute medical illness, surgery, or alcohol abuse, patients with a low beta-cell function reserve [e.g., type 2 diabetes patients with low C-peptide or latent autoimmune diabetes in adults (LADA)], pancreatic disorders suggesting insulin deficiency (e.g., type 1 diabetes, history of pancreatitis, or pancreatic surgery), insulin dose reduction (including insulin pump failure), and patients with a history of ketoacidosis. These patients should be monitored closely. Caution should also be taken when reducing the insulin dose in patients requiring insulin (see 4 DOSAGE AND ADMINISTRATION).

  Temporarily discontinue treatment with INVOKAMET XR in T2DM patients who are hospitalized for major surgical procedures, or will undergo scheduled surgery, and patients who are hospitalized for serious infections or acute serious medical illnesses. Monitoring for DKA is recommended in these patients even if INVOKAMET XR treatment has been interrupted or discontinued. Based on canagliflozin half-life, glucosuria may persist longer than expected and DKA may be prolonged in some patients. In post-marketing adverse event reports, most cases reported prolongation from 3 to 10 days after discontinuation of INVOKAMET XR, however a few cases reported longer prolongation. Ensure risk factors for ketoacidosis are resolved prior to restarting INVOKAMET XR.

  Educate patients on the signs and symptoms of ketoacidosis and instruct patients to discontinue INVOKAMET XR and seek medical attention immediately if signs and symptoms occur.

  • Hypoglycemia in Add-on Therapy with other Antihyperglycemic Agents

When canagliflozin was used as add-on therapy with insulin or an insulin secretagogue (e.g., sulfonylurea), the incidence of hypoglycemia was increased over that of placebo. Therefore, to lower the risk of hypoglycemia, a dose reduction of insulin or an insulin secretagogue may be considered (see 8 ADVERSE REACTIONS and 4.1 Dosing Considerations).

• Increases in Low-Density Lipoprotein (LDL-C)

Dose-related increases in LDL-C are seen with canagliflozin treatment (see 8.4 Abnormal Laboratory Findings: Hematologic, Clinical Chemistry and Other Quantitative Data). LDL-C levels should be monitored.

Metformin hydrochloride

• Hypoglycemia

Hypoglycemia does not occur in patients receiving metformin alone under usual circumstances of use, but could occur when caloric intake is deficient, when strenuous exercise is not compensated by caloric supplementation, or during concomitant use with other glucose lower agents or ethanol.

Elderly, debilitated, or malnourished patients and those with adrenal or pituitary insufficiency or alcohol intoxication are particularly susceptible to hypoglycemic effects. Hypoglycemia may be difficult to recognize in the elderly, and in people who are taking β-adrenergic blocking drugs.

• Lactic Acidosis

Lactic acidosis is a rare, but serious, metabolic complication that occurs due to metformin accumulation during treatment with INVOKAMET XR. When it occurs, it is fatal in approximately 50% of cases. Lactic acidosis may also occur in association with a number of pathophysiologic conditions, including diabetes mellitus, and whenever there is significant tissue hypoperfusion and hypoxemia. Lactic acidosis is characterized by elevated blood lactate levels (> 5 mmol/L), decreased blood pH, electrolyte disturbances with an increased anion gap, and an increased lactate/pyruvate ratio. When metformin is implicated as the cause of lactic acidosis, metformin plasma levels > 5 μg/mL are generally found.

The reported incidence of lactic acidosis in patients receiving metformin HCl is very low (approximately 0.03 cases / 1000 patient-years, with approximately 0.015 fatal cases / 1000 patient-years) and occurs primarily in diabetic patients with significant renal insufficiency, including both intrinsic renal disease and renal hypoperfusion, often in the setting of multiple concomitant medical/surgical problems and multiple concomitant medications. Patients with congestive heart failure requiring pharmacologic management, in particular those with unstable or acute congestive heart failure who are at risk of hypoperfusion and hypoxemia, are at increased risk of lactic acidosis. In particular, treatment of the elderly should be accompanied by careful monitoring of renal function. INVOKAMET XR treatment should not be initiated in patients ≥ 80 years of age, unless measurement of creatinine clearance demonstrates that renal function is not reduced, as the patients are more susceptible to developing lactic acidosis. The risk of lactic acidosis increases with the degree of renal dysfunction and the patient’s age. The risk of lactic acidosis may, therefore, be significantly decreased by regular monitoring of renal function in patients taking metformin and by use of the minimum effective dose of metformin. In addition, INVOKAMET XR should be promptly withheld in the presence of any condition associated with hypoxemia, dehydration or sepsis. Because impaired hepatic function may significantly limit the ability to clear lactate, INVOKAMET XR should generally be avoided in patients with clinical or laboratory evidence of hepatic disease. Patients should be cautioned against excessive alcohol intake, either acute or chronic, when taking metformin hydrochloride since alcohol intake potentiates the effect of metformin hydrochloride on lactate metabolism. In addition, INVOKAMET XR should be temporarily discontinued prior to any intravascular radiocontrast study and for any surgical procedure.

The onset of lactic acidosis is often subtle, and accompanied only by nonspecific symptoms such as malaise, myalgia, respiratory distress, increasing somnolence and non-specific abdominal distress. There may be associated hypothermia, hypotension and resistance bradyarrhythmias with more marked acidosis. The patient and the patient’s physician must be aware of the possible importance of such symptoms and the patient should be instructed to notify the physician immediately if they occur. INVOKAMET XR should be withdrawn until the situation is clarified. Serum electrolytes, ketones, blood glucose and, if indicated, blood pH, lactate levels and even blood metformin levels may be useful. Once a patient is stabilized on any dose level of metformin, gastrointestinal symptoms, which are common during initiation of therapy, are unlikely to be drug related. Later occurrence of gastrointestinal symptoms could be due to lactic acidosis or other serious disease. In patients taking metformin, levels of fasting venous plasma lactate above the upper limit of normal but < 5 mmol/L, do not necessarily indicate impending lactic acidosis and may be explainable by other mechanisms, such as poorly controlled diabetes or obesity, vigorous physical activity or technical problems in sample handling. Lactic acidosis should be suspected in any diabetic patient with metabolic acidosis lacking evidence of ketoacidosis (ketonuria and ketonemia).

Lactic acidosis is a medical emergency that must be treated in a hospital setting. In a patient with lactic acidosis who is taking INVOKAMET XR, the drug should be discontinued immediately, and general supportive measures should be promptly instituted. Because metformin HCl is dialysable (with clearance of up to 170 mL/min under good hemodynamic conditions), prompt hemodialysis is recommended to correct the acidosis and remove the accumulated metformin.

Physicians should instruct their patients to recognize the symptoms which could be signal onset of lactic acidosis. If acidosis of any kind develops, INVOKAMET XR should be discontinued immediately and the patient should be immediately hospitalized.

• Change in Clinical Status in Patients with Previously Controlled Type 2 Diabetes

A patient with type 2 diabetes previously well-controlled on INVOKAMET XR who develops laboratory abnormalities or clinical illness (especially vague and poorly defined illness) should be evaluated promptly for evidence of ketoacidosis or lactic acidosis. Evaluation should include serum electrolytes and ketones, blood glucose and, if indicated, blood pH, lactate, pyruvate, and metformin levels. If acidosis of either form occurs, INVOKAMET XR must be stopped immediately and other appropriate corrective measures initiated.

• Loss of control of blood glucose

When a patient stabilized on any diabetic regimen is exposed to stress such as fever, trauma, infection, or surgery, a temporary loss of glycemic control may occur. At such times, it may be necessary to withhold INVOKAMET XR and temporarily administer insulin. INVOKAMET XR may be reinstituted after the acute episode is resolved.

• Vitamin B₁₂ levels

In controlled clinical trials of metformin of 29-week duration, a decrease to subnormal levels of previously normal serum Vitamin B12 levels, without clinical manifestations, was observed in approximately 7% of patients. Such decrease, possibly due to interference with B12 absorption from the B12-intrinsic factor complex, is, however, very rarely associated with anemia and appears to be rapidly reversible with discontinuation of metformin or Vitamin B12 supplementation. Measurement of hematologic parameters on an annual basis is advised in patients on metformin and any apparent abnormalities should be appropriately investigated and managed (see 7 WARNINGS AND PRECAUTIONS, Monitoring and Laboratory Tests). Certain individuals (those with inadequate Vitamin B12 or calcium intake or absorption) appear to be predisposed to developing subnormal Vitamin B12 levels. Measurements of serum Vitamin B12 are advisable at least every one to two years in patients on long term INVOKAMET XR therapy.

Genitourinary

Canagliflozin

• Genital Mycotic Infections

Canagliflozin increases the risk of genital mycotic infections, consistent with the mechanism of increased urinary glucose. Patients with a history of genital mycotic infections and uncircumcised males were more likely to develop genital mycotic infections (see 8 ADVERSE REACTIONS).

• Urinary tract infections (including urosepsis and pyelonephritis)

Treatment with canagliflozin increases the risk for urinary tract infections (see 8 ADVERSE REACTIONS). There have been post-marketing reports of serious urinary tract infections, including urosepsis and pyelonephritis, requiring hospitalization in patients treated with canagliflozin.

• Fournier’s gangrene (necrotizing fasciitis of the perineum)

Post-marketing cases of necrotizing fasciitis of the perineum (Fournier’s gangrene), a rare but serious and potentially life-threatening necrotizing infection requiring urgent surgical intervention, have been reported in female and male patients with diabetes mellitus receiving SGLT2 inhibitors, including INVOKAMET XR. Serious outcomes have included hospitalization, multiple surgeries, and death.

Patients treated with INVOKAMET XR who present with pain or tenderness, erythema, or swelling in the genital or perineal area, with or without fever, or malaise should be evaluated for necrotizing fasciitis. If suspected, INVOKAMET XR should be discontinued and prompt treatment should be instituted (including broad-spectrum antibiotics and surgical debridement if necessary).

Hematologic

Canagliflozin

Mean hemoglobin and hematocrit increased in patients administered canagliflozin, as did the frequency of patients with abnormally elevated values for hemoglobin/hematocrit (see 8.4 Abnormal Laboratory Findings: Hematologic, Clinical Chemistry and Other Quantitative Data). INVOKAMET XR should be used with caution in patients with an elevated hematocrit.

Hepatic/Biliary/Pancreatic

INVOKAMET XR is contraindicated in patients with clinical or laboratory evidence of hepatic disease (see 2 CONTRAINDICATIONS).

Canagliflozin

Canagliflozin has not been studied in patients with severe hepatic impairment.

Metformin hydrochloride

Metformin use in patients with impaired hepatic function has been associated with some cases of lactic acidosis.

Immune

Serious hypersensitivity reactions, including angioedema and anaphylaxis, have been reported post-market in patients treated with canagliflozin. If a hypersensitivity reaction is suspected, discontinue INVOKAMET XR, assess for other potential causes and initiate alternative treatment for diabetes (see 8.5 Post-Market Adverse Reactions).

Monitoring and Laboratory Tests

Blood Glucose and HbA1c

Response to INVOKAMET XR treatment should be monitored by periodic measurements of blood glucose and HbA1c levels. Due to its mechanism of action, patients taking INVOKAMET XR will test positive for glucose in their urine.

Renal function

Renal function should be assessed prior to initiation of INVOKAMET XR and regularly thereafter (see 4 DOSAGE AND ADMINISTRATION). INVOKAMET XR is contraindicated in patients with a serum creatinine level above the upper limit of normal range [serum creatinine levels ≥ 136 µmol/L (males) or ≥ 124µmol/L females)], abnormal creatinine clearance (< 60 mL/min), or when renal function is not known (see 2 CONTRAINDICATIONS).

Reduced intravascular volume

INVOKAMET XR is not recommended for use in patients who are volume depleted. Before initiating INVOKAMET XR, assess volume status, particularly in patients at risk (e.g., moderate renal impairment, the elderly, in patients with low systolic blood pressure, or if on a loop diuretic, angiotensin-converting enzyme inhibitor, or angiotensin receptor blocker).

In patients with volume depletion, the condition should be corrected prior to initiation of INVOKAMET XR (see 4.1 Dosing Considerations).

For patients , with risk factors of volume depletion in case of intercurrent conditions that may lead to volume depletion (such as a gastrointestinal illness), careful monitoring of volume status (e.g., physical examination, blood pressure measurements, laboratory tests including renal function tests), and serum electrolytes is recommended during treatment with INVOKAMET XR. Temporary interruption of treatment with INVOKAMET XR should be considered until volume depletion is corrected.

LDL-cholesterol

LDL-C levels should be measured at baseline and at regular intervals during treatment with INVOKAMET XR due to dose-dependent increases in LDL-C seen with therapy.

Digoxin levels

In patients taking digoxin and canagliflozin 300 mg once daily for seven days, there was an increase in the total exposure (AUC) and peak drug concentration (Cmax) of digoxin (20% and 36%, respectively), therefore patients taking INVOKAMET XR concomitantly with digoxin should be monitored appropriately.

Hematology

Initial and periodic monitoring of hematologic parameters (e.g., hemoglobin/hematocrit and red blood cell indices) should be performed regularly. While megaloblastic anemia has rarely been seen with metformin therapy, if this is suspected, Vitamin B12 deficiency should be excluded.

Musculoskeletal

Canagliflozin

An increased risk of bone fractures, occurring as early as 12 weeks after treatment initiation, was observed in patients using canagliflozin. Consider factors that contribute to fracture risk prior to initiating canagliflozin.

Peri-Operative Considerations

INVOKAMET XR therapy should be temporarily discontinued for any surgical procedure (except minor procedures not associated with restricted intake of food and fluids). INVOKAMET XR should be discontinued 2 days before surgical intervention and should not be restarted until the patient's oral intake has resumed and renal function has been evaluated as normal.

Renal

Impairment of renal function

Canagliflozin increases serum creatinine and decreases eGFR in a dose dependent fashion. In clinical trials, renal function abnormalities have occurred after initiating canagliflozin. Post-marketing cases of acute kidney injury, including acute renal failure and a decline in eGFR, some requiring hospitalization and dialysis, shortly after initiation of canagliflozin treatment have been reported. Before initiating INVOKAMET XR, consider factors that may predispose patients to acute kidney injury including hypovolemia, chronic renal insufficiency, congestive heart failure and concomitant medications (diuretics, ACE inhibitors, ARBs, NSAIDs) (see 7 WARNINGS AND PRECAUTIONS, Cardiovascular and 8 ADVERSE REACTIONS). Consider temporarily discontinuing INVOKAMET XR in any setting of reduced oral intake (such as acute illness or fasting) or fluid losses (such as gastrointestinal illness or excessive heat exposure); monitor patients for signs symptoms of acute kidney injury. If acute kidney injury occurs, discontinue INVOKAMET XR promptly and institute treatment.

Renal function should be assessed prior to initiation of INVOKAMET XR and regularly thereafter. More frequent renal function monitoring is recommended in patients whose eGFR decreases to < 60 mL/min/1.73 m² after initiating treatment.

Use in renal impairment

INVOKAMET XR is contraindicated in patients with serum creatinine levels above the upper limit of normal range, as suggested by serum creatinine levels ≥ 136 μmol/L (males), ≥ 124 μmol/L (females) or abnormal creatinine clearance (< 60 mL/min).

Metformin is excreted by the kidney, and the risk of metformin accumulation and lactic acidosis increases with the degree of impairment of renal function. Thus, patients with serum creatinine levels above the upper limit of the normal range for their age should not receive INVOKAMET XR. Before initiation of INVOKAMET XR therapy and every 6 months while on INVOKAMET XR therapy, renal function should be assessed and verified as being within normal range.

Decreased renal function occurs more commonly in elderly patients and can be asymptomatic. In patients in whom development of renal dysfunction is anticipated, renal function should be assessed more frequently and INVOKAMET XR discontinued if evidence of renal impairment is present.

Special caution should be exercised in situations where renal function may become impaired, for example when initiating antihypertensive therapy or diuretic therapy and when starting therapy with an NSAID.

Use of Concomitant Medications that May Affect Renal Function or Metformin Disposition

Concomitant medication(s) that may affect renal function or result in a significant hemodynamic change or interfere with the disposition of metformin such as cationic drugs that are eliminated by renal tubular secretion should be used with caution (see 9 DRUG INTERACTIONS).

Administration of Iodinated Contrast Agent

Intravascular contrast studies with iodinated materials can lead to acute alteration of renal function and have been associated with lactic acidosis in patients receiving metformin (see 2 CONTRAINDICATIONS). Therefore, in patients in whom any such study is planned, INVOKAMET XR should be temporarily discontinued at the time of or prior to the procedure and withheld for 48 hours subsequent to the procedure and reinstituted only after renal function has been re-evaluated and found to be normal.

7.1 Special Populations

7.1.1 Pregnant Women

INVOKAMET XR is contraindicated in pregnancy (see 2 CONTRAINDICATIONS). There are no adequate and well-controlled studies in pregnant women with INVOKAMET XR or its individual components, therefore, the safety of INVOKAMET XRin pregnant women is not known.

Canagliflozin

Based on results from rat studies, canagliflozin may affect renal development and maturation. In a juvenile rat study, increased kidney weights and renal pelvic and tubular dilatation were evident at greater than or equal to 0.5 times clinical exposure from a 300 mg dose (see 16 NON-CLINICAL TOXICOLOGY).

Metformin hydrochloride

Metformin was not teratogenic in rats and rabbits at doses up to 600 mg/kg/day, or about two times the maximum recommended human daily dose on a body surface area basis. Determination of fetal concentrations demonstrated a partial placental barrier to metformin. Because animal reproduction studies are not always predictive of human response, metformin is contraindicated during pregnancy (see 2 CONTRAINDICATIONS).

7.1.2 Breast-feeding

INVOKAMET XR is contraindicated during nursing (see 2 CONTRAINDICATIONS). No studies in lactating animals have been conducted with INVOKAMET XR or its individual components.

Canagliflozin

It is not known if canagliflozin is excreted in human milk. Available pharmacodynamic/toxicological data in animals have shown excretion of canagliflozin in the milk of lactating rats reaching levels which are approximately 1.4 times higher than plasma systemic exposure. Data in juvenile rats directly exposed to canagliflozin showed risk to the developing kidney (renal pelvic and tubular dilatations) during maturation.

Metformin hydrochloride

Studies in lactating rats show that metformin is excreted into milk and reaches levels comparable to those in plasma. Metformin is excreted into human milk.

7.1.3 Pediatrics

Safety and effectiveness of INVOKAMET XR in pediatric patients under 18 years of age have not been established; therefore, Health Canada has not authorized an indication for pediatric use.

7.1.4 Geriatrics

INVOKAMET XR treatment is associated with reduced renal function and should be used with caution as age increases because elderly patients are more likely to have decreased renal function (see 7 WARNINGS AND PRECAUTIONS, Renal and 4 DOSAGE AND ADMINISTRATION, Geriatrics) as metformin is eliminated by the kidney.

Canagliflozin

Two thousand thirty-four (2,034) patients 65 years and older, and 345 patients 75 years and older were exposed to canagliflozin in nine clinical studies of canagliflozin (see 14 CLINICAL TRIALS).

Patients 65 years and older had a higher incidence of adverse reactions related to reduced intravascular volume with canagliflozin (such as hypotension, postural dizziness, orthostatic hypotension, syncope, and dehydration), particularly with the 300 mg daily dose, compared to younger patients; more prominent increase in the incidence was seen in patients who were 75 years and older (see 4 DOSAGE AND ADMINISTRATION and 8 ADVERSE REACTIONS). Smaller reductions in HbA1C with canagliflozin relative to placebo were seen in older (65 years and older; -0.61% with canagliflozin 100 mg and -0.74% with canagliflozin 300 mg relative to placebo) compared to younger patients (-0.72% with canagliflozin 100 mg and -0.87% with canagliflozin 300 mg relative to placebo).

Metformin hydrochloride

Controlled clinical studies of metformin did not include sufficient numbers of elderly patients to determine whether they respond differently from younger patients, although other reported clinical experience has not identified differences in responses between the elderly and younger patients. Metformin is known to be substantially excreted by the kidney and because the risk of serious adverse reactions to the drug is greater in patients with impaired renal function, metformin should only be used in patients with normal renal function (see 2

CONTRAINDICATIONS). Because aging is associated with reduced renal function, INVOKAMET XR should be used with caution as age increases.

8 ADVERSE REACTIONS

8.1 Adverse Reaction Overview

There have been no clinical safety and efficacy studies conducted with INVOKAMET XR tablets in type 2 diabetes mellitus patients. However, INVOKAMET XR tablets demonstrated comparable bioavailability of canagliflozin and metformin extended-release with co-administered tablets of canagliflozin and metformin extended-release in comparative bioavailability studies (see 10.3 Pharmacokinetics).

Canagliflozin

The safety of canagliflozin was evaluated in fourteen double-blind, controlled Phase 3 and Phase 4 clinical studies involving 18,248 patients with type 2 diabetes, including 11,078 patients treated with canagliflozin 100 mg and 7,170 patients, treated with canagliflozin 300 mg. Of the 18,248 patients with type 2 diabetes, a total of 10,134 patients were treated in two dedicated cardiovascular studies, followed for a mean of 149 weeks (mean of 223 weeks in CANVAS and 94 weeks in CANVAS-R), and 8,114 patients treated in 12 double-blind, controlled Phase 3 and Phase 4 clinical studies, followed for a mean of 49 weeks.

The primary assessment of safety and tolerability was conducted in a pooled analysis (N=2313) of four 26-week placebo-controlled clinical studies (monotherapy and add-on therapy with metformin, metformin and sulfonylurea, and metformin and pioglitazone). The most commonly reported adverse reactions during treatment (≥ 5%) were vulvovaginal candidiasis, urinary tract infection (UTI), and polyuria or pollakiuria. Adverse reactions leading to discontinuation of ≥ 0.5% of all canagliflozin-treated patients in these studies were vulvovaginal candidiasis (0.7% of females) and balanitis or balanoposthitis (0.5% of males).

A total of 8 serious adverse drug reactions were reported in the primary placebo-controlled safety population, including 5 reports from patients taking canagliflozin 100 mg daily (2 urticaria, 2 UTI, and 1 nausea), 2 reports from patients taking canagliflozin 300 mg daily (1 UTI, 1 constipation) and 1 report from a patient in the placebo group (reduced intravascular volume). Of these serious adverse reactions, 2 led to discontinuation in the canagliflozin group (UTI and urticaria).

Metformin hydrochloride

Lactic acidosis: very rare (< 1/10, 000 and isolated reports) (see 7 WARNINGS AND PRECAUTIONS, and 5 OVERDOSAGE).

Gastrointestinal Reactions: very common (> 1/10). Gastrointestinal symptoms (diarrhea, nausea, vomiting, abdominal bloating, flatulence, and anorexia) are the most common reactions to metformin and are approximately 30% more frequent in patients on metformin monotherapy than in placebo-treated patients, particularly during initiation of metformin therapy. These symptoms are generally transient and resolve spontaneously during continued treatment. Because significant diarrhea and/or vomiting can cause dehydration and prerenal azotemia, metformin should be temporarily discontinued, under such circumstances.

For patients who have been stabilized on metformin, nonspecific gastrointestinal symptoms should not be attributed to therapy unless intercurrent illness or lactic acidosis have been excluded.

Special Senses: common (≥ 1/100): taste disturbance, i.e. metallic taste.

Dermatologic Reactions: very rare (< 1/10,000 and isolated reports): Reports of skin reactions such as erythema, pruritus, and urticaria are very rare.

Hematologic: During controlled clinical trials of 29 weeks duration, approximately 9% of patients on metformin monotherapy developed asymptomatic subnormal serum Vitamin B12 levels; serum folic acid levels did not decrease significantly. Five cases of megaloblastic anemia have been reported with metformin administration and no increased incidence of neuropathy has been observed. (See 7 WARNINGS AND PRECAUTIONS, Endocrine and Metabolism).

Decrease of Vitamin B12 absorption with decrease of serum levels during long-term use of metformin is rare (≥ 1/10,000 and < 1/1,000). Consideration of such etiology is recommended if a patient presents with megaloblastic anemia.

Hepatic: very rare (< 1/10,000 and isolated reports). Liver function tests abnormalities or hepatitis resolving upon metformin discontinuation has been documented in isolated reports.

Canagliflozin and Metformin hydrochloride

The incidence and type of adverse reactions in 26-week placebo-controlled metformin add-on studies were similar to the adverse reactions in the four 26-week placebo-controlled clinical studies used for the primary assessment of safety and tolerability. There were no additional adverse reactions identified in the pooling of these three placebo-controlled studies that included metformin relative to the four placebo-controlled studies.

8.2 Clinical Trial Adverse Reactions

Clinical trials are conducted under very specific conditions. The adverse reaction rates observed in the clinical trials; therefore, may not reflect the rates observed in practice and should not be compared to the rates in the clinical trials of another drug. Adverse reaction information from clinical trials may be useful in identifying and approximating rates of adverse drug reactions in real-world use.

Table 3 to Table 6Error! Reference source not found. include treatment-emergent adverse events (TEAEs) reported in ≥ 2% of canagliflozin-treated patients.

Combination with Metformin (Studies DIA3006 and DIA3009)

Table 3: Adverse events (regardless of causality) reported in ≥ 2% of patients treated with canagliflozin and more frequently than in the placebo groups* in double-blind clinical trials of canagliflozin in add-on combination use with metformin, and compared to sitagliptin or placebo (Study DIA3006, 26 weeks) or to glimepiride (Study DIA3009, 52 weeks)

*In either study

Combination with a Metformin and a Sulfonylurea (Studies DIA3002 and DIA3015)

Table 4: Adverse events (regardless of causality) reported in ≥ 2% of patients treated with canagliflozin and more frequently than in the placebo groups* in double-blind clinical trials of canagliflozin in add-on combination use with metformin and a sulfonylurea, and compared to placebo (Study DIA3002, 26 weeks) or sitagliptin (Study DIA3015, 52 weeks)

*In either study

Combination with Metformin and Pioglitazone (Study DIA3012)

Table 5: Adverse events (regardless of causality) reported in ≥ 2% of patients treated with canagliflozin and more frequently than in the placebo group in a 26-week double-blind clinical trial of canagliflozin in add-on combination use with metformin and pioglitazone, and compared to placebo (Study DIA3012)

Combination with Insulin and Metformin (Study DIA3008 Insulin Substudy)

Table 6: Adverse events (regardless of causality) reported in ≥ 2% of patients treated with canagliflozin and more frequently than in the placebo group in a 18-week double-blind clinical trial of canagliflozin in add-on combination use with insulin and metformin, and compared to placebo (Study DIA3008 - Insulin Substudy)

8.3 Less Common Clinical Trial Adverse Reactions

Below is a list of less common (< 2%)¹ clinical trial adverse reactions.

Metabolism and nutrition disorders: dehydration²

Nervous system disorders: dizziness postural², syncope²

Skin and subcutaneous tissue disorders: rash³, urticaria

Vascular disorders: hypotension², orthostatic hypotension²

Description of Selected Adverse Reactions

Reduced intravascular volume: In the pooled analysis of the four 26-week, placebo-controlled studies, the incidence of all adverse reactions related to reduced intravascular volume (e.g., postural dizziness, orthostatic hypotension, hypotension, dehydration, and syncope) was 1.2% for canagliflozin 100 mg, 1.3% for canagliflozin 300 mg, and 1.1% for placebo. The incidence of these adverse reactions with canagliflozin treatment in the two active-controlled studies was similar to comparators.

In one of the dedicated long-term cardiovascular study (CANVAS), where patients were generally older with a higher prevalence of comorbidities, the incidence rate of adverse reactions related to reduced intravascular volume were 2.34 with canagliflozin 100 mg, 2.87 with canagliflozin 300 mg, and 1.85 with placebo, events per 100 patient-years of exposure.

To assess risk factors for these adverse reactions, a larger pooled analysis (N=12,441) of patients from 13 controlled Phase 3 and Phase 4 studies including both doses of canagliflozin was conducted. In this pooled analysis, patients on loop diuretics, patients with moderate renal impairment (eGFR 30 to < 60 mL/min/1.73 m²), and patients ≥ 75 years of age had higher incidences of these reactions. For patients on loop diuretics, the incidence rates were 4.98 on canagliflozin 100 mg and 5.67 on canagliflozin 300 mg compared to 4.15 events per 100 patient-years of exposure in the control group. For patients with a baseline eGFR 30 to < 60 mL/min/1.73 m², the incidence rates were 5.24 on canagliflozin 100 mg and 5.35 on canagliflozin 300 mg compared to 3.11 events per 100 patient-years of exposure in the control group. In patients ≥ 75 years of age, the incidence rates were 5.27 on canagliflozin 100 mg and 6.08 on canagliflozin 300 mg compared to 2.41 events per 100 patient-years of exposure in the control group (see 7 WARNINGS AND PRECAUTIONS, Cardiovascular, 4 DOSING AND ADMINISTRATION and 10 CLINICAL PHARMACOLOGY, Special Populations and Conditions).

¹ Adverse drug reactions (ADRs) were identified based on a comprehensive assessment of biological plausibility, mechanism of action, dose dependence in incidence rate, time of onset, seriousness and consistency of findings across four, 26-week placebo-controlled Phase 3 clinical studies. Additional supportive safety analyses were conducted on a large pooled dataset from eight active- and placebo-controlled Phase 3 clinical studies.

² Related to reduced intravascular volume (see Adverse reactions related to reduced intravascular volume).

³ Rash includes the terms: rash erythematous, rash generalized, rash macular, rash maculopapular, rash papular, rash pruritic, rash pustular, and rash vesicular

Diabetic ketoacidosis: Cases of DKA, a serious life-threatening condition requiring urgent hospitalization, have been reported in patients with type 2 diabetes mellitus treated with SGLT2 inhibitors, including canagliflozin. In the on-treatment analysis of the CANVAS/CANVAS-R integrated dataset, the adjusted incidence rates of adjudicated diabetic ketoacidosis were 0.08 (0.2%, 14/5,790) and 0.01 (< 0.1%, 1/4,344) per 100 subject-years, for the combined canagliflozin and the placebo groups, respectively. Fatal cases of DKA have been reported in patients treated with canagliflozin. INVOKAMET XR should not be used in patients with type 1 diabetes. In a number of reported cases, the presentation of the condition was atypical with blood glucose values below 13.9 mmol/L (250 mg/dL) (see 7 WARNINGS AND PRECAUTIONS, Endocrine and Metabolism).

Hypoglycemia: In individual clinical trials (see 14 CLINICAL TRIALS), episodes of hypoglycemia occurred at a higher rate when canagliflozin was co-administered with insulin or sulfonylurea (see Table 7; 7 WARNINGS AND PRECAUTIONS, Endocrine and Metabolism and 4 DOSAGE AND ADMINISTRATION).

Table 7: Incidence of Hypoglycemia¹ in Controlled Clinical Studies

Twice Daily Dosing

The incidence of hypoglycemia in a Phase 2 clinical study with twice daily dosing (canagliflozin 50 mg or 150 mg twice daily in combination with metformin) was reported in 4.3% and 3.2% of patients treated with canagliflozin 50 mg and 150 mg twice daily, respectively, compared to 3.2% in placebo-treated patients. There were no cases of severe hypoglycemia reported in the canagliflozin or placebo groups.

Genital mycotic infections: Vulvovaginal candidiasis (including vulvovaginitis and vulvovaginal mycotic infection) was reported in 10.4% and 11.4% of female patients treated with canagliflozin 100 mg and canagliflozin 300 mg, respectively, compared to 3.2% in placebo-treated female patients. Most reports of vulvovaginal candidiasis occurred during the first four months of treatment with canagliflozin. Among female patients taking canagliflozin, 2.3% experienced more than one infection. Overall, 0.7% of all female patients discontinued canagliflozin due to vulvovaginal candidiasis (see 7 WARNINGS AND PRECAUTIONS, Genitourinary).

Candidal balanitis or balanoposthitis was reported in 4.2% and 3.7% of male patients treated with canagliflozin 100 mg and canagliflozin 300 mg, respectively, compared to 0.6% in placebo-treated male patients. Among male patients taking canagliflozin, 0.9% had more than one infection. Overall, 0.5% of male patients discontinued canagliflozin due to candidial balanitis or balanoposthitis. In uncircumcised males in a pooled analysis of 10 controlled trials, the incidence rate of phimosis was 0.56 events per 100 patient-years of exposure in patients treated with canagliflozin and 0.05 events per 100 patient-years in patients treated with comparator. In this pooled analysis, the incidence rate of circumcision was 0.38 events per 100 patient-years of exposure in male patients treated with canagliflozin compared to 0.10 events per 100 patients-years in male patients treated with comparator (see 7 WARNINGS AND PRECAUTIONS, Genitourinary).

In the CANVAS integrated dataset, the adjusted-incidence rates of any male mycotic genital infection were 3.17 and 0.96 per 100 patient-years in the combined canagliflozin and placebo groups, respectively.

Urinary tract infections: Urinary tract infections were more frequently reported for canagliflozin 100 mg and 300 mg (5.9% versus 4.3%, respectively) compared to 4.0% with placebo. Most infections were mild to moderate with no increase in the occurrence of serious adverse events. Subjects responded to standard treatments while continuing canagliflozin treatment. The incidence of recurrent infections was not increased with canagliflozin.

Falls: In the pool of all Phase 3 studies, the incidence rate of AEs coded as related to a fall was 7.3, 8.0, and 11.8 per 1000 patient years of exposure to comparator, canagliflozin 100 mg, and canagliflozin 300 mg, respectively.

Fournier’s gangrene (necrotizing fasciitis of the perineum): Fournier’s gangrene was identified as a SGLT2i class adverse reaction based on spontaneous event reporting. These events had not been previously identified as ADRs because there were very few subjects in the canagliflozin Phase 3 and Phase 4 clinical development program (including the CANVAS and CREDENCE programs) with adverse events of Fournier’s gangrene (incidences were < 0.1% in the canagliflozin and comparator groups). All 4 events of Fournier’s gangrene (2 subjects treated with canagliflozin and 2 subjects treated with comparator) in the canagliflozin Phase 3 and Phase 4 clinical development program were serious.

Bone fractures: In cardiovascular study (CANVAS) of 4,327 patients with established or at least two risk factors for cardiovascular disease, the incidence rates of all adjudicated bone fracture were 1.59, 1.79, and 1.09 per 100-patient years of follow up to canagliflozin 100 mg, canagliflozin 300 mg, and placebo, respectively, with the fracture imbalance initially occurring within the first 26 weeks of therapy.

In a second cardiovascular study (CANVAS-R) of 5,807 patients with established or at least two risk factors for cardiovascular disease, the incidence rates of all adjudicated bone fracture were 1.14 and 1.32 events per 100 patient-years of follow up to canagliflozin and placebo, respectively.

In other type 2 diabetes studies with canagliflozin, which enrolled a general diabetes population of 7,729 patients and where bone fractures were adjudicated, the incidence rates of all adjudicated bone fracture were 1.18 and 1.08 events per 100 patient-years of follow up to canagliflozin and control, respectively.

Decreases in Bone Mineral Density: Bone mineral density (BMD) was measured by dual-energy X-ray absorptiometry in a clinical trial of 714 older adults (mean age 64 years). At 2 years, patients randomized to canagliflozin 100 mg and canagliflozin 300 mg had placebo-corrected declines in BMD at the total hip of 0.9% and 1.2%, respectively, and at the lumbar spine of 0.3% and 0.7%, respectively. Placebo-adjusted BMD declines were 0.1% at the femoral neck for both canagliflozin doses and 0.4% at the distal forearm for patients randomized to canagliflozin 300 mg. The placebo-adjusted change at the distal forearm for patients randomized to canagliflozin 100 mg was 0%.

Photosensitivity: In the CANVAS outcome trials integrated dataset, the adjusted-incidence rates of photosensitivity adverse events were 1.03 (0.3%, 19/5790) and 0.26 (0.1%, 3/4344) events per 1,000 subject-years in the combined canagliflozin and the placebo groups, respectively. In a dataset from 12 other phase 3 or 4 trials (excluding the CANVAS outcome trials) that enrolled a diabetic population of 8114 patients, an imbalance in phototoxicity adverse events was not seen with canagliflozin relative to control.

Skin ulcers and peripheral ischemia: In the pool of 8 clinical studies with 78 weeks of mean duration of exposure, skin ulcers occurred in 0.7%, 1.1%, and 1.5% of patients and peripheral ischemia occurred in 0.1%, 0.4%, and 0.2% of patients receiving comparator, canagliflozin 100 mg, and canagliflozin 300 mg, respectively. An imbalance in these events generally were seen within the first 24 weeks of treatment and occurred in patients with known or at high risk for atherosclerotic disease, longer duration of diabetes, presence of diabetic complications, and diuretic use.

Renal Cell Carcinoma: In the CANVAS outcome trials integrated dataset, the adjusted-incidence rates of any renal cell carcinoma adverse event were 0.62 (0.2%, 14/5790) and 0.21 (0.1%, 3/4344) per 1,000 subject-years in the canagliflozin and the placebo groups, respectively. Whether this numerical imbalance is related to canagliflozin treatment is unknown.

Lower limb amputation: An approximately 2-fold increased risk of lower limb amputations associated with canagliflozin use was observed in CANVAS and CANVAS-R, two large, randomized, placebo-controlled trials evaluating patients with type 2 diabetes who had either established cardiovascular disease or were at risk for cardiovascular disease. The imbalance occurred as early as the first 26 weeks of therapy. Patients in CANVAS and CANVAS-R were followed for an average of 5.7 and 2.1 years, respectively. The amputation data for CANVAS and CANVAS-R are shown in Table 8 and Table 9, respectively. (See 7 WARNINGS AND PRECAUTIONS, Cardiovascular).

Table 8: CANVAS Amputations

Note: Incidence is based on the number of patients with at least one amputation, and not the total number of amputation events. A patient’s follow-up is calculated from Day 1 to the first amputation event date. Some patients had more than one amputation

Table 9: CANVAS-R Amputations

Note: Incidence is based on the number of patients with at least one amputation, and not the total number of amputation events. A patient’s follow-up is calculated from Day 1 to the first amputation event date. Some patients had more than one amputation.

In a data pool of patients from 12 other phase 3 or 4 trials (excluding CANVAS program) that enrolled a diabetic population of 8114 patients, the majority of which were without cardiovascular disease, no difference in lower limb amputation risk was observed on canagliflozin relative to control.

Elderly Patients: Compared to younger patients, patients 65 years and older had a higher incidence of adverse reactions related to reduced intravascular volume with canagliflozin, including hypotension, postural dizziness, orthostatic hypotension, syncope, and dehydration. In particular, in patients ≥ 75 years of age, adverse reactions related to reduced intravascular volume occurred with incidence rates of 5.27, 6.08 and 2.41 events per 100 patient-years of exposure for canagliflozin 100 mg, canagliflozin 300 mg, and the control group, respectively. Decreases in eGFR (-3.41 and -4.67 mL/min/1.73 m²) were reported with canagliflozin 100 mg and 300 mg, respectively, compared to the control group (-4.15 mL/min/1.73 m²) (see 7 WARNINGS AND PRECAUTIONS and 4.2 Recommended Dose and Dosage Adjustment).

Patients with an eGFR 45 to < 60 mL/min/1.73 m²: In an analysis of patients with a baseline eGFR 45 to < 60 mL/min/1.73 m², the incidence rates of adverse reactions related to reduced intravascular volume were 4.61 for canagliflozin 100 mg and 4.37 for canagliflozin 300 mg relative to 3.00 events per 100 patient-years of exposure for placebo (see 7 WARNINGS AND PRECAUTIONS and 4 DOSAGE AND ADMINISTRATION). Serum creatinine levels increased from baseline to end of treatment by 5.92 and 6.98 µmol/L for canagliflozin 100 mg and 300 mg, respectively, relative to 7.03 µmol/L with placebo. Blood urea nitrogen (BUN) levels increased from baseline to end of treatment by 0.92 and 0.77 µmol/L for canagliflozin 100 mg and 300 mg, respectively, relative to 0.57 µmol/L with placebo. The incidence rates of decreases in eGFR (< 80 mL/min/1.73 m² and >30% decrease from baseline) at any time during treatment were 5.17, 6.62, and 5.82 events per 100-patient years of exposure for canagliflozin 100 mg, canagliflozin 300 mg, and placebo, respectively. At the last post-baseline value, incidence rates for such decreases were 2.52 for patients treated with canagliflozin 100 mg, 1.91 for patients treated with canagliflozin 300 mg, and 3.20 events per 100 patient-years of exposure for placebo (see 7 WARNINGS AND PRECAUTIONS).

The incidences of elevated serum potassium (> 5.4 mEq/L and 15% above baseline) at any post-baseline value were 4.11 for canagliflozin 100 mg, 4.33 for canagliflozin 300 mg, and 3.8 events per 100 patient-years of exposure for placebo. Rare, more severe elevations were seen in patients with moderate renal impairment who had prior elevated potassium concentrations and/or who were on multiple medications that reduce potassium excretion, such as potassium-sparing diuretics and angiotensin-converting-enzyme (ACE) inhibitors.

Serum phosphate changes from baseline to end of treatment were 0.00 and 0.02 mmol/L for canagliflozin 100 mg and 300 mg, respectively, compared to 0.00 mmol/L for placebo. The incidence rates of elevated serum phosphate (> 1.65 mmol/L and 25% above baseline) at any post-baseline value were 0.93 for canagliflozin 100 mg, 1.15 for canagliflozin 300 mg and 0.71 events per 100 patient-years of exposure for placebo.

8.4 Abnormal Laboratory Findings: Hematologic, Clinical Chemistry and Other Quantitative Data

Laboratory values, described below, are derived from the pooled analysis of 26-week, placebo-controlled clinical studies unless otherwise noted.

Increases in serum potassium: Mean percent changes from baseline in blood potassium were 0.5% and 1.0% for canagliflozin 100 mg and 300 mg, respectively, compared to 0.6% for placebo. Episodes of elevated serum potassium (> 5.4 mEq/L and 15% above baseline) were seen in 4.4% of patients treated with canagliflozin 100 mg, 7.0% of patients treated with canagliflozin 300 mg, and 4.8% of patients treated with placebo.

In a trial in patients with moderate renal impairment (eGFR 30 to < 50 mL/min/1.73 m²), increases in serum potassium to > 5.4 mEq/L and 15% above baseline were seen in 16.1%, 12.4%, and 27.0% of patients treated with placebo, canagliflozin 100 mg, and canagliflozin 300 mg, respectively. Elevations to ≥ 6.5 mEq/L occurred in 1.1%, 2.2%, and 2.2% of patients treated with placebo, canagliflozin 100 mg, and canagliflozin 300 mg, respectively.

Increases in serum creatinine and blood urea nitrogen (BUN): Mean percent changes from baseline in creatinine, with commensurate decreases in eGFR, were 2.8% and 4.0% for canagliflozin 100 mg and 300 mg, respectively, compared to 1.5% for placebo. Mean percent increases from baseline in BUN were 17.1% and 18.0% for canagliflozin 100 mg and 300 mg, respectively, compared to 2.7% for placebo. These changes were generally observed within six weeks of treatment initiation. Subsequently, serum creatinine concentrations gradually trended toward baseline and BUN levels remained stable.

The proportion of patients with larger decreases in eGFR (> 30%) from baseline, occurring at any time during treatment, was 2.0% with canagliflozin 100 mg and 4.1% with canagliflozin 300 mg relative to 2.1% with placebo. At study end, decreases of > 30% from baseline were seen for 0.7% of subjects with canagliflozin 100 mg, 1.4% with canagliflozin 300 mg, and 0.5% with placebo (see 7 WARNINGS AND PRECAUTIONS). After discontinuation of canagliflozin therapy, these changes in laboratory values improved or returned to baseline.

In an integrated analysis of data from two long-term cardiovascular outcome studies, patients treated with canagliflozin experienced an initial fall in mean eGFR that thereafter stabilized (see Figure 1) whereas patients treated with placebo experienced a progressive decline in eGFR

Figure 1: Adjusted mean eGFR over time

Lipid changes: Compared to placebo, mean increases from baseline in low density lipoprotein cholesterol (LDL-C) were 0.11 mmol/L (4.5%) and 0.21 mmol/L (8.0%) with canagliflozin 100 mg and canagliflozin 300 mg, respectively. Increases in total cholesterol of 0.12 mmol/L (2.5%) and 0.21 mmol/L (4.3%) were seen, relative to placebo, for canagliflozin 100 mg and canagliflozin 300 mg, respectively. Increases in non-HDL-C relative to placebo were 0.05 mmol/L (1.5%) and 0.13 mmol/L (3.6%) with canagliflozin 100 mg and 300 mg, respectively. Increases in high-density lipoprotein cholesterol (HDL-C) were 0.06 mmol/L (5.4%), and 0.07 mmol/L (6.3%) relative to placebo for canagliflozin 100 mg and canagliflozin 300 mg, respectively. The LDL-C/HDL-C ratios did not change with either canagliflozin dose compared to placebo.

Increases in hemoglobin: Mean hemoglobin concentration increased from baseline 4.7 g/L (3.5%) with canagliflozin 100 mg and 5.1 g/L (3.8%) with canagliflozin 300 mg, compared to a decrease of -1.8 g/L (-1.1%) with placebo. After 26 weeks of treatment, 0.8%, 4.0%, and 2.7% of patients treated with placebo, canagliflozin 100 mg, and canagliflozin 300 mg, respectively, had a hemoglobin level above the upper limit of normal.

Increases in serum phosphate: Dose-related increases in serum phosphate levels were observed with canagliflozin. In the pool of four placebo-controlled trials, the mean percent change in serum phosphate levels were 3.6% and 5.1% with canagliflozin 100 mg and canagliflozin 300 mg, respectively, compared to 1.5% with placebo. Episodes of elevated serum phosphate (>1.65 mmol/L and 25% above baseline) were seen in 0.6% and 1.6% of patients treated with canagliflozin 100 mg and 300 mg, respectively, compared to 1.3% of patients treated with placebo.

Decreases in serum urate: Moderate decreases in the mean percent change from baseline in serum urate were observed in the canagliflozin 100 mg and 300 mg groups (-10.1% and -10.6%, respectively) compared with placebo, where a slight increase from baseline (1.9%) was observed. Decreases in serum urate in the canagliflozin groups were maximal or near maximal by Week 6 and maintained with dosing. A transient increase in urinary uric acid excretion was seen, which was not persistent.

Electrolytes: The following changes from baseline to end of treatment in serum electrolytes were observed during canagliflozin treatment in the CANVAS integrated database.

Table 10: Placebo-adjusted Mean Changes from Baseline in Electrolytes at Week 18 or 26^a in the CANVAS program

^a CANVAS study blood chemistries obtained at week 18, CANVAS-R study blood chemistries obtained at week 26

SE = standard error

ANCOVA for Week 18 or 26 includes the baseline electrolyte as a linear covariate, and treatment and study as fixed effects.

The following shifts from normal range at baseline to below or above the normal range at worst value on treatment were reported in the treated set in the CANVAS integrated database:

• Increases in serum sodium above the upper limit of normal occurred more frequently in patients receiving canagliflozin than in those receiving placebo (2.63 per 100 subject years for canagliflozin and 1.80 per 100 subject years for placebo).
• Decreases in serum magnesium below the lower limit of normal occurred more frequently in patients receiving placebo (0.65 per 100 subject years for canagliflozin and 3.80 per 100 subject years for placebo), whilst increases in serum magnesium above the upper limit of normal occurred more frequently in patients receiving canagliflozin than in those receiving placebo (1.25 per 100 subject years for canagliflozin and 0.88 per 100 subject years for placebo).
• Decreases of serum bicarbonate below the lower limit of normal occurred more frequently in patients receiving canagliflozin than in those receiving placebo (2.91 per 100 subject years for canagliflozin, 2.39 per 100 subject years for placebo).
• Increases of serum phosphate above the upper limit of normal occurred more frequently in patients receiving canagliflozin than in those receiving placebo (1.36 per 100 subject years for canagliflozin and 1.00 per 100 subject years for placebo).

8.5 Post-Market Adverse Reactions

Because these reactions were reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure.

Canagliflozin

Gastrointestinal Disorders: pancreatitis acute

Metabolism and nutrition disorders: diabetic ketoacidosis

Immune system disorders: anaphylactic reaction

Skin and subcutaneous tissue disorders: angioedema

Renal and urinary disorders: acute kidney injury, including acute renal failure (with or without volume depletion).

Genitourinary: severe urinary tract infections; urosepsis and pyelonephritis

Musculoskeletal: bone fractures

Infections and infestations: Fournier’s gangrene (necrotizing fasciitis of the perineum)

Metformin hydrochloride

Gastrointestinal Disorders: Abdominal discomfort, abdominal distension, abdominal pain, abdominal pain upper, constipation, diarrhea, dry mouth, dyspepsia, flatulence, gastric disorder, gastric ulcer, gastrointestinal disorder, nausea, vomiting

Hepatobiliary Disorders: Liver function tests abnormalities or hepatitis resolving upon metformin discontinuation, autoimmune hepatitis, drug-induced liver injury, hepatitis

Investigations: Blood lactic acid increased

Metabolism and Nutrition Disorders: Lactic acidosis, decrease of Vitamin B12 absorption with decrease of serum levels during long-term use of metformin, weight decreased, decreased appetite

Skin and Subcutaneous Tissue Disorders: Erythema, pruritus, rash, skin lesion, urticaria

9 DRUG INTERACTIONS

9.2 Drug Interactions Overview

Specific pharmacokinetic drug interactions studies with INVOKAMET XR have not been performed, although such studies have been conducted with the individual canagliflozin and metformin components.

Co-administration of canagliflozin (300 mg once daily) and metformin (2000 mg once daily) had no clinically relevant effect on the pharmacokinetics of either canagliflozin or metformin.

Canagliflozin

Canagliflozin did not induce CYP450 enzyme expression (3A4, 2C9, 2C19, 2B6, and 1A2) in cultured human hepatocytes. Canagliflozin did not inhibit the CYP450 isoenzymes (1A2, 2A6, 2C19, 2D6, or 2E1) and weakly inhibited CYP2B6, CYP2C8, CYP2C9, and CYP3A4 based on in vitro studies with human hepatic microsomes. Canagliflozin is a weak inhibitor of P-gp.

Canagliflozin is also a substrate of drug transporters P-glycoprotein (P-gp), Breast Cancer Resistance Protein (BCRP) and Multi-Drug Resistance-Associated Protein 2 (MRP2).

Inhibition of BCRP by canagliflozin cannot be excluded at an intestinal level and increased exposure may therefore occur for drugs transported by BCRP, e.g., certain statins like rosuvastatin and some anti-cancer agents.

9.3 Drug-Behavioural Interactions

Patients should be alerted to the elevated risk of adverse reactions related to reduced intravascular volume, such as postural dizziness, and to the risk of hypoglycemia when INVOKAMET XR is used as add-on therapy with insulin or an insulin secretagogue (see 7 WARNINGS AND PRECAUTIONS, 8 ADVERSE REACTIONS and 4.1 Dosing Considerations).Patients should be cautioned against excessive alcohol intake, either acute or chronic, when taking INVOKAMET XR, since alcohol intake potentiates the effect of metformin on lactate metabolism (see 2 CONTRAINDICATIONS). The risk of lactic acidosis is increased in acute alcohol intoxication, particularly in case of fasting or malnutrition or hepatic insufficiency. INVOKAMET XR is contraindicated in patients with clinical or laboratory evidence of hepatic disease (see 2 CONTRAINDICATIONS). It is recommended that consumption of alcohol and alcohol-containing medicinal product be avoided.

9.4 Drug-Drug Interactions

The drugs listed are based on either drug interaction case reports or studies, or potential interactions due to the expected magnitude and seriousness of the interaction.

Effects of other drugs on canagliflozin

In clinical studies, the effects of other drugs on canagliflozin were assessed. Cyclosporin (P-gp inhibitor), hydrochlorothiazide, oral contraceptives (ethinyl estradiol and levonorgestrel), metformin, and probenecid (UGT, MRP2, OATP, OAT1 and OAT3 inhibitor) had no clinically relevant effect on the pharmacokinetics of canagliflozin.

Table 11: Effect of Co-administered Drugs on Systemic Exposure of Canagliflozin

Effects of canagliflozin on other drugs

Canagliflozin at steady-state had no clinically relevant effect on the pharmacokinetics of metformin, oral contraceptives (ethinyl estradiol and levonorgestrel-CYP3A4 substrates),

glyburide (CYP2C9 substrate), simvastatin (CYP3A4 substrate), acetaminophen, hydrochlorothiazide, or warfarin (CYP2C9 substrate), in healthy subjects.

Table 12: Effect of Canagliflozin on Systemic Exposure of Co-Administered Drugs

Metformin hydrochloride

Glyburide: In a single-dose interaction study in type 2 diabetes patients, coadministration of metformin and glyburide did not result in any changes in either metformin pharmacokinetics or pharmacodynamics. Decreases in glyburide AUC and Cmax were observed, but were highly variable. The single-dose nature of this study and the lack of correlation between glyburide blood levels and pharmacodynamic effects make the clinical significance of this interaction uncertain.

Furosemide: A single-dose, metformin-furosemide drug interaction study in healthy subjects demonstrated that pharmacokinetic parameters of both compounds were affected by coadministration. Furosemide increased the metformin plasma and blood C_max by 22% and blood AUC by 15%, without any significant change in metformin renal clearance. When administered with metformin, the C_max and AUC of furosemide were 31% and 12% smaller, respectively, than when administered alone, and the terminal half-life was decreased by 32%, without any significant change in furosemide renal clearance. No information is available about the interaction of metformin and furosemide when coadministered chronically.

Nifedipine: A single-dose, metformin-nifedipine drug interaction study in normal healthy volunteers demonstrated that coadministration of nifedipine increased plasma metformin C_max and AUC by 20% and 9%, respectively, and increased the amount excreted in the urine. T_max and half-life were unaffected. Nifedipine appears to enhance the absorption of metformin. Metformin had minimal effects on nifedipine.

Cationic drugs: Cationic drugs (e.g., amiloride, digoxin, morphine, procainamide, quinidine, quinine, ranitidine, triamterene, trimethoprim, or vancomycin) that are eliminated by renal tubular secretion, theoretically have the potential for interaction with metformin by competing for common renal tubular transport systems. Such an interaction has been observed between metformin and oral cimetidine in normal healthy volunteers in both single- and multiple-dose, metformin-cimetidine drug interaction studies, with a 60% increase in peak metformin plasma and whole blood concentrations and a 40% increase in plasma and whole blood metformin AUC.

There was no change in elimination half-life in the single-dose study. Metformin had no effect on cimetidine pharmacokinetics. Therefore, careful patient monitoring and dose adjustment of metformin or the interfering drug is recommended in patients who are taking cationic medications that are excreted via renal tubular secretion.

Anticoagulant: Elimination rate of the anticoagulant phenprocoumon has been reported to be increased by 20% when used concurrently with metformin. Therefore, patients receiving phenprocoumon or other antivitamin K anticoagulants should be monitored carefully when both types of drugs are used simultaneously. In such cases, an important increase of prothrombin time may occur upon cessation of INVOKAMET XR therapy, with an increased risk of hemorrhage.

Other: Other drugs tend to produce hyperglycemia and may lead to loss of blood sugar control. These include the thiazides and other diuretics, corticosteroids, phenothiazines, thyroid products, estrogens, estrogen plus progestogen, oral contraceptives, phenytoin, nicotinic acid, sympathomimetics, calcium channel blocking drugs, isoniazid and beta-2-agonists. ACE inhibitors may decrease the blood glucose levels. When such drugs are administered to a patient receiving metformin the patient should be closely observed to maintain adequate glycemic control.

Diuretics, especially loop diuretics, may increase the risk of lactic acidosis due to their potential to decrease renal function.

INVOKAMET XR is not recommended for use in patients receiving loop diuretics. Canagliflozin may add to the effect of diuretics and may increase the risk of hypovolemia and hypotension (see 7 WARNINGS AND PRECAUTIONS and 4 DOSAGE AND ADMINISTRATION).

9.5 Drug-Food Interactions

Interactions with food have not been established.

9.6 Drug-Herb Interactions

St John’s Wort (Hypericum perforatum) is a CYP3A4 inducer and co-administration with INVOKAMET XR may result in loss of efficacy or reduced clinical response. Dosage adjustment may be required (see 4.2 Recommended Dose and Dosage Adjustment).

9.7 Drug-Laboratory Interactions

Due to its mechanism of action, patients taking INVOKAMET XR will test positive for glucose in their urine.

Increases in urinary glucose excretion with INVOKAMET XR can falsely lower 1,5-anhydroglucitol (1,5 AG) levels and make measurements of 1,5 AG unreliable in assessing glycemic control. Therefore, 1,5-AG assays should not be used for assessment of glycemic control in patients on INVOKAMET XR. For further detail, it may be advisable to contact the specific manufacturer of the 1,5-AG assay.

Intravascular contrast studies with iodinated materials can lead to acute alteration of renal function and have been associated with lactic acidosis in patients receiving metformin (see 2 CONTRAINDICATIONS and 7 WARNINGS AND PRECAUTIONS).

10 CLINICAL PHARMACOLOGY

10.1 Mechanism of Action

INVOKAMET XR (canagliflozin/ metformin hydrochloride extended-release) combines two oral antihyperglycemic agents with complementary mechanisms of action to improve glycemic control in patients with type 2 diabetes: canagliflozin, a sodium-glucose co-transporter 2 (SGLT2) inhibitor, and metformin hydrochloride, a member of the biguanide class.

Canagliflozin

Sodium-glucose co-transporter 2 (SGLT2), expressed in the proximal renal tubules, is responsible for the majority of the reabsorption of filtered glucose from the tubular lumen. Patients with diabetes have been shown to have elevated renal glucose reabsorption which may contribute to persistent elevated glucose concentrations. Canagliflozin is an orally-active inhibitor of SGLT2. By inhibiting SGLT2, canagliflozin reduces reabsorption of filtered glucose and lowers the renal threshold for glucose (RT_G), and thereby increases urinary glucose excretion, which decreases elevated plasma glucose concentrations by an insulin-independent mechanism in patients with type 2 diabetes. The increased urinary glucose excretion with SGLT2 inhibition also translates to an osmotic diuresis, with the diuretic effect leading to a reduction in systolic blood pressure; the increase in urinary glucose excretion results in a loss of calories and therefore a reduction in body weight, as demonstrated in studies of patients with type 2 diabetes.

Canagliflozin’s action to increase UGE directly lowering plasma glucose is independent of insulin. Improvement in homeostasis model assessment for beta-cell function (HOMA beta-cell) and improved beta-cell insulin secretion response to a mixed-meal challenge has been observed in clinical studies with canagliflozin.

In Phase 3 studies, pre-meal administration of canagliflozin 300 mg provided a greater reduction in post-meal glucose excursion than observed with the 100 mg dose. This effect at the 300 mg dose of canagliflozin may, in part, be due to local inhibition of intestinal SGLT1 (an important intestinal glucose co-transporter) related to transient high concentrations of canagliflozin in the intestinal lumen prior to drug absorption (canagliflozin is a low potency inhibitor of SGLT1). Studies have shown no glucose malabsorption with canagliflozin.

Metformin hydrochloride

Metformin is a biguanide derivative producing an antihyperglycemic effect which can only be observed in man or in the diabetic animal and only when there is insulin secretion. Metformin, at therapeutic doses, does not cause hypoglycemia when used alone in man or in the non-diabetic animal, except when using a near lethal dose. Metformin has no effects on the pancreatic beta cells. The mode of action of metformin is not fully understood. It has been postulated that metformin might potentiate the effect of insulin or that it might enhance the effect of insulin on the peripheral receptor site. This increased sensitivity seems to follow an increase in the number of insulin receptors on cell surface membranes.

10.2 Pharmacodynamics

Following single and multiple oral doses of canagliflozin to patients with type 2 diabetes, dose-dependent decreases in RT_G and increases in urinary glucose excretion were observed. From a starting value of RT_G of approximately 13 mmol/L, maximal suppression of 24-hour mean RT_G was seen with the 300 mg daily dose to approximately 4 to 5 mmol/L in patients with type 2 diabetes in Phase 1 studies (see model in Figure 2), suggesting a low risk for treatment-induced hypoglycemia. The reductions in RT_G led to increased UGE in subjects with type 2 diabetes treated with either 100 mg or 300 mg of canagliflozin ranging from 77 to 119 g/day across the Phase 1 studies; the UGE observed translates to a loss of 308 to 476 kcal/day. The reductions in RT_G and increases in UGE were sustained over a 26-week dosing period in patients with type 2 diabetes. Moderate increases (generally <400-500 mL) in daily urine volume were seen that attenuated over several days of dosing. Urinary uric acid excretion was transiently increased by canagliflozin (increased by 19% compared to baseline on day 1 and then attenuating to 6% on day 2 and 1% on day 13). This was accompanied by a sustained reduction in serum uric acid concentration of approximately 20%.

Figure 2 : Predicted (PK/PD Modelled) 24-Hour Profile for RT_G in Subjects with Type 2 Diabetes Treated with Canagliflozin 100 mg and 300 mg

In a single-dose study in patients with type 2 diabetes, treatment with 300 mg before a mixed meal delayed intestinal glucose absorption and reduced postprandial glucose through both renal and non-renal mechanisms.

Cardiac electrophysiology

In a randomized, double-blind, placebo-controlled, active-comparator, 4-way crossover study, 60 healthy subjects were administered a single oral dose of canagliflozin 300 mg, canagliflozin 1200 mg (4 times the maximum recommended dose), moxifloxacin, and placebo. No meaningful changes in QT_c interval were observed with either the recommended dose of 300 mg or the 1200 mg dose. At the 1200 mg dose, peak canagliflozin plasma concentrations were approximately 1.4 times the steady-state peak concentrations following a 300 mg once-daily dose.

10.3 Pharmacokinetics

The results of studies in healthy subjects demonstrated comparable canagliflozin and metformin bioavailability between INVOKAMET XR 50 mg/500 mg, 50 mg/1000 mg, 150 mg/500 mg and 150 mg/1000 mg combination tablets versus co-administrated corresponding doses of canagliflozin and metformin hydrochloride extended-release as individual tablets.

Administration of INVOKAMET XR 150 mg/1000 mg fixed-dose combination with food resulted in no change in overall exposure of canagliflozin. In contrast, food ingestion delayed metformin’s T_max by approximately 2 hours and increased the extent of metformin exposure (AUC_T) by approximately 70%. Consistent with administration instructions for metformin extended-release tablets, it is recommended that INVOKAMET XR be taken with a meal.

After administration of two INVOKAMET XR 150 mg/1000 mg tablets once daily with an evening meal for 7 days in healthy adult subjects, steady-state for canagliflozin and metformin was reached by Day 6 and Day 3, respectively. For canagliflozin, the steady state median T_max was approximately 1.75 hours with a mean C_max,ss and AUC_ss of 3,078 ng/mL and 26,320 ng.h/mL, respectively. For metformin, the steady state median T_max was approximately 8.0 hour with a mean C_max,ss and AUC_ss of 1,581 ng/mL and 19,386 ng.h/mL, respectively.

Canagliflozin

Pharmacokinetics of canagliflozin were comparable between healthy volunteers and type 2 diabetic patients based on clinical trials and population pharmacokinetic data. After single-dose oral administration of 100 mg and 300 mg in healthy subjects, canagliflozin was rapidly absorbed, with peak plasma concentrations (median T_max) occurring 1 to 2 hours post-dose. Plasma C_max and AUC of canagliflozin increased in a dose-proportional manner from 50 mg to 300 mg. The apparent terminal half-life (t_1/2) (expressed as mean ± standard deviation) was 10.6 ± 2.13 hours to 13.1 ± 3.28 hours for the 100 mg and 300 mg doses, respectively. Steady-state was reached after 4 to 5 days of once-daily dosing with canagliflozin 100 mg to 300 mg. Canagliflozin does not exhibit time-dependent pharmacokinetics, and accumulated in plasma up to 36% following multiple doses of 100 mg and 300 mg.

Table 13: Summary of Canagliflozin’s Pharmacokinetic Parameters in Healthy Subjects and T2DM Patients at Steady State

^a From Study DIA1030

^b From Study DIA1023

Absorption

Canagliflozin

The mean absolute oral bioavailability of canagliflozin is approximately 65%. Co-administration of a high-fat meal with canagliflozin had no effect on the pharmacokinetics of canagliflozin; therefore, canagliflozin may be taken with or without food (see 4 DOSAGE AND ADMINISTRATION).

Metformin hydrochloride

Following a single oral dose of 1000 mg metformin hydrochloride extended-release tablet once-daily after a meal, the time to reach maximum plasma metformin concentration (T_max) is approximately 7 - 8 hours. In both single and multiple dose studies in healthy subjects, once daily 1000 mg dosing provides equivalent systemic exposure, as measured by area-under-the-curve (AUC), of metformin relative to the immediate release given as 500 mg twice daily.

Once daily oral doses of metformin hydrochloride 500 mg to 2500 mg doses resulted in less than proportional increases in both AUC and C_max. The mean C_max values were 473 ± 145, 868 ± 223, 1171 ± 297, and 1630 ± 399 ng/mL for once daily doses of 500, 1000, 1500, and 2500 mg, respectively. For AUC, the mean values were 3501 ± 796, 6705 ± 1918, 9299 ± 2833, and 14161 ± 4432 ng.hr/mL for once daily doses of 500, 1000, 1500, and 2500 mg, respectively.

Low-fat and high-fat meals increased the systemic exposure (as measured by AUC) from metformin hydrochloride extended-release tablets by about 38% and 73%, respectively, relative to fasting. Both meals prolonged metformin T_max by approximately 3 hours, but C_max was not affected. In an open label pharmacoscintigraphic pharmacokinetic study in healthy volunteers, metformin hydrochloride 500 mg dosed with different fat content meals was evaluated. Both the gastric retention time and the systemic exposure of metformin were higher following the high fat meal than following the AHA 30% fat meal, demonstrating that extended gastric retention enables extended delivery of metformin. For transit times < 7 hours as sometimes seen in AHA 30% fat meal administration, absorption of metformin may be decreased almost linearly with decreasing upper GI transit time.

Distribution

Canagliflozin

The mean steady-state volume of distribution of canagliflozin following a single intravenous infusion in healthy subjects was 119 L, suggesting extensive tissue distribution. Canagliflozin is extensively bound to proteins in plasma (99%), mainly to albumin. Protein binding is independent of canagliflozin plasma concentrations. Plasma protein binding is not meaningfully altered in patients with renal or hepatic impairment.

Metformin hydrochloride

Plasma protein binding is negligible. Metformin partitions into erythrocytes. The blood peak is lower than the plasma peak and appears at approximately the same time. The red blood cells most likely represent a secondary compartment of distribution. The mean V_d ranged between 63 – 276 liters.

Metabolism

Canagliflozin

O-glucuronidation is the major metabolic elimination pathway for canagliflozin, which is mainly glucuronidated by UDP glucuronosyl transferase 1A9 (UGT1A9) and 2b4 (UGT2B4) to two inactive O-glucuronide metabolites. CYP3A4-mediated (oxidative) metabolism of canagliflozin is minimal (approximately 7%) in humans.

Metformin hydrochloride

Metformin is not metabolized. Its main sites of concentration are the intestinal mucosa and the salivary glands. The plasma concentration at steady-state ranges about 1 to 2 mcg/mL. Certain drugs may potentiate the effects of metformin (see 7 WARNINGS AND PRECAUTIONS and 9.4 Drug-Drug Interactions). Metabolism studies with extended-release metformin tablets have not been conducted.

Elimination

Canagliflozin

Following administration of a single oral [¹⁴C] canagliflozin dose to healthy subjects, 41.5%, 7.0%, and 3.2% of the administered radioactive dose was recovered in faeces as canagliflozin, a hydroxylated metabolite, and an O-glucuronide metabolite, respectively. Enterohepatic circulation of canagliflozin was negligible.

Approximately 33% of the administered radioactive dose was excreted in urine, mainly as O-glucuronide metabolites (30.5%). Less than 1% of the dose was excreted as unchanged canagliflozin in urine. Renal clearance for the 100 mg and 300 mg doses ranged from 1.30 to 1.55 mL/min.

Canagliflozin is a low-clearance drug, with a mean systemic clearance of approximately 192 mL/min in healthy subjects following intravenous administration.

Metformin hydrochloride

Metformin is excreted in urine at high renal clearance rate of about 450 mL/min. The initial elimination of metformin is rapid with a half-life varying between 1.7 and 3 hours. The terminal elimination phase accounting for about 4 to 5 % of the absorbed dose is slow with a half-life between 9 and 17 hours.

Special Populations and Conditions

Studies characterizing the pharmacokinetics of canagliflozin and metformin after administration of INVOKAMET XR were not conducted in patients with renal and hepatic impairment and other special populations. Descriptions of the individual components in this patient population are described below.

• Pediatrics: Based on the data submitted and reviewed by Health Canada, the safety and efficacy of canagliflozin in pediatric patients < 18 years of age have not been established; therefore, Health Canada has not authorized an indication for pediatric use (see 7.1.3 Pediatrics).

  An open-label, sequential, multiple-dose, multicentre pediatric Phase 1 study examined the pharmacokinetics and pharmacodynamics of canagliflozin in children and adolescents ≥11 to <18 years of age (mean age 14.6 years) with type 2 diabetes mellitus who were on a stable dose of metformin. The mean body weight was 107.15 kg (range: 48.5 to 168.6 kg).

  The patients were treated with canagliflozin once-daily 100 mg or 300 mg for 14 days.

Table 14: Mean (SD) Plasma Canagliflozin Pharmacokinetic Parameters on Day 14

• Geriatrics: Studies characterizing the pharmacokinetics of canagliflozin and metformin after administration of INVOKAMET XR in geriatric patients (> 65 years of age) have not been performed (see 7 WARNINGS AND PRECAUTIONS, 8 ADVERSE REACTIONS and 4 DOSAGE AND ADMINISTRATION).

  Canagliflozin

  Age had no clinically meaningful effect on the pharmacokinetics of canagliflozin based on a population pharmacokinetic analysis. However, patients 65 years and older had a higher incidence of adverse reactions related to reduced intravascular volume with INVOKAMET XR (see 7 WARNINGS AND PRECAUTIONS, 8 ADVERSE REACTIONS and 4 DOSAGE AND ADMINISTRATION).

  Metformin hydrochloride

  Controlled clinical studies of metformin did not include sufficient numbers of elderly patients to determine whether they respond differently from younger patients.

• Sex:

  Canagliflozin

  Dose normalized exposures of canagliflozin in females were 22% higher than males, based on population pharmacokinetic analysis. These increases in exposures are not clinically meaningful and hence no dosage adjustment of canagliflozin is necessary based on gender.

  Metformin hyrdrochloride

  In the pharmacokinetic studies in healthy volunteers, there were no important differences between male and female subjects with respect to metformin AUC (males = 268, females = 293) and t1/2 (males = 229, females = 260). However, Cmax for metformin were somewhat higher in female subjects (Female/Male Cmax Ratio = 1.4). The gender differences for Cmax are unlikely to be clinically important.

• Genetic Polymorphism: Both UGT1A9 and UGT2B4 are subject to genetic polymorphism. In a pooled analysis of clinical data, increases in canagliflozin AUC of 26% were observed in UGT1A9*1/*3 carriers and 18% in UGT2B4*2/*2 carriers. These increases in canagliflozin exposure are not expected to be clinically relevant and no dosage adjustment is necessary based on UGT1A9 and UGT2B4 genetic polymorphisms. The effect of being homozygote (UGT1A9*3/*3, frequency <0.1%) is probably more marked, but has not been investigated.

• Hepatic Insufficiency:

  Canagliflozin

  INVOKAMET XR are contraindicated in patients with clinical or laboratory evidence of hepatic disease (see 2 CONTRAINDICATIONS). Relative to subjects with normal hepatic function, the geometric mean ratios for C_max and AUC_∞ of canagliflozin were 107% and 110%, respectively, in subjects with Child-Pugh class A (mild hepatic impairment) and 96% and 111%, respectively, in subjects with Child-Pugh class B (moderate hepatic impairment) following administration of a single 300 mg dose of canagliflozin.

  These differences are not considered to be clinically meaningful. There is no clinical experience in patients with Child-Pugh class C (severe) hepatic impairment and therefore, canagliflozin is not recommended for use in this patient population.

  Metformin hydrochloride

  No pharmacokinetic studies of metformin have been conducted in patients with hepatic insufficiency

• Renal Insufficiency:

  Canagliflozin

  A single-dose, open-label study evaluated the pharmacokinetics of canagliflozin 200 mg in subjects with varying degrees of renal impairment, classified using the Modification of Diet in Renal Disease (MDRD)-eGFR formula, compared to healthy subjects. The study included 3 subjects with normal renal function (eGFR ≥ 90 mL/min/1.73 m²), 10 subjects with mild renal impairment (eGFR 60 to < 90 mL/min/1.73 m²), 9 subjects with moderate renal impairment (eGFR 30 to < 60 mL/min/1.73 m²), and 10 subjects with severe renal impairment (eGFR 15 to < 30 mL/min/1.73 m²) as well as 8 subjects with end stage renal disease (ESRD) on hemodialysis.

  The C_max of canagliflozin was moderately increased by 13%, 29%, and 29% in subjects with mild, moderate, and severe renal failure, respectively, but not in subjects on hemodialysis. Compared to healthy subjects, plasma AUC of canagliflozin was increased by approximately 17%, 63%, and 50% in subjects with mild, moderate, and severe renal impairment, respectively, but was similar for ESRD subjects and healthy subjects. Increases in canagliflozin AUC of this magnitude are not considered clinically relevant, however, the pharmacodynamic response to canagliflozin declines with increasing severity of renal impairment (see 2 CONTRAINDICATIONS and 7 WARNINGS AND PRECAUTIONS). Canagliflozin was negligibly removed by hemodialysis.

  Metformin hydrochloride

  INVOKAMET XR is contraindicated in patients with serum creatinine levels above the upper limit of normal range, as suggested by serum creatinine levels ≥ 136 μmol/L (males), ≥ 124 μmol/L (females) or abnormal creatinine clearance (<60 mL/min) (see 2 CONTRAINDICATIONS and 4 DOSAGE AND ADMINISTRATION).

  In patients with decreased renal function (based on measured creatinine clearance (< 60 mL/min), the plasma and blood half-lives of metformin are prolonged and the renal clearance is decreased in proportion to the decrease in creatinine clearance.

• Obesity: For subjects with body weight < 78.2 kg, the dose normalized exposures of canagliflozin increased by 33%, based on population pharmacokinetic analysis. These increases in exposures are not clinically meaningful and hence no dosage adjustment of

  • canagliflozin is necessary based on body weight.

• Ethnic Origin:

  Canagliflozin

  Dose normalized exposures of canagliflozin were comparable in white and non-white subjects, Blacks, Asians, and other ethnic origins. A population PK analysis of canagliflozin in 942 white subjects and 674 non-white subjects showed no significant impact of ethnic origin on canagliflozin PK and hence no dosage adjustment of canagliflozin is necessary based on ethnic origin.

  Metformin hydrochloride

  In studies conducted with metformin extended release (Glumetza), there were no definitive conclusions on the differences between the ethnic origins with respect to the pharmacokinetics because of the imbalance in the respective sizes of the racial groups. However, the data suggest a trend towards higher metformin C_max and AUC values for metformin are obtained in Asian subjects when compared to Caucasian, Hispanic and Black subjects. The differences between the Asian and Caucasian groups are unlikely to be clinically important.

11 STORAGE, STABILITY AND DISPOSAL

INVOKAMET XR tablets should be stored at 15-30°C. Store INVOKAMET XR in the original container. Patients should be instructed to talk to their pharmacist about any medications that have expired, or that they no longer use. Medications should not be disposed in wastewater or household waste.

12 SPECIAL HANDLING INSTRUCTIONS

Keep INVOKAMET XR in the original container out of the sight and reach of children.

PART II: SCIENTIFIC INFORMATION

13 PHARMACEUTICAL INFORMATION

Drug Substance: Canagliflozin plus metformin hydrochloride

Proper name:	Canagliflozin	Metformin hydrochloride
Chemical name:	(1S)-1,5-anhydro-1-[3-[[5-(4-fluorophenyl)-2-thienyl]methyl]-4-methylphenyl]-D-glucitol hemihydrate	1,1-Dimethylbiguanide hydrochloride
Molecular formula:	C24H25FO5S•1/2 H2O	C4H11N5•HCl
Molecular mass:	Hemihydrate: 453.53 Anhydrous: 444.52	165.62
Structural formula:
Physicochemical properties:	Canagliflozin is practically insoluble in aqueous media from pH 1.1 to 12.9. There is no detectable pKa value for this substance.	Metformin hydrochloride is freely soluble in various aqueous media, irrespective of pH,and has low permeability.

14 CLINICAL TRIALS

14.1 Clinical Trial by Indication

Type 2 Diabetes Mellitus

There have been no clinical efficacy studies conducted with INVOKAMET XR, however, bioequivalence of INVOKAMET XR to canagliflozin and metformin extended release co-administered as individual tablets was demonstrated in healthy subjects (see 10.3 Pharmacokinetics). The co-administration of canagliflozin and metformin has been studied in patients with type 2 diabetes inadequately controlled on diet and exercise and as add-on therapy with other antihyperglycemic agents.

Table 15: Summary of Patient Demographics for Clinical Trials in Specific Indication

In the metformin add-on studies, a total of 5,031 patients with type 2 diabetes were randomized in six double-blind, controlled clinical efficacy and safety studies conducted to evaluate the effects of canagliflozin on glycemic control. The racial distribution was 71% White, 15% Asian, 5% Black, and 9% other groups. Approximately 20% of patients were Hispanic. Approximately 54% of patients were male. Patients had an overall mean age of 59.6 years (range 21 to 91 years), with 1036 patients 65 years of age and older and 121 patients 75 years of age and older,

In addition, an 18-week double-blind, placebo-controlled Phase 2 study with twice daily dosing (canagliflozin 50 mg or 150 mg in combination with metformin) was conducted in 279 patients in which 186 patients were treated with canagliflozin in combination with metformin.

Study Results

In patients with type 2 diabetes, treatment with canagliflozin produced statistically significant improvements in A1C, fasting plasma glucose (FPG), 2-hour postprandial glucose (PPG), and body weight, compared to placebo. Canagliflozin was effective in reducing A1C in a broad range of patients regardless of disease duration and concomitant use of antihyperglycemic agents. The durability of these reductions in A1C was demonstrated in two Phase 3 studies, with minimal attenuation of the glycemic response to canagliflozin over 52 weeks, in contrast to the deterioration of the glycemic response observed with comparators.

Statistically significant improvements in glycemic control relative to placebo were observed with canagliflozin when given as add-on therapy with metformin, add-on therapy with metformin and a sulfonylurea, add-on therapy with metformin and pioglitazone, or as add-on therapy with insulin and metformin).

In addition, significant improvements in A1C were observed with canagliflozin in older patients. Reductions in A1C were observed across subgroups including age, gender, race, baseline body mass index (BMI), and baseline beta-cell function. Greater reductions in A1C relative to placebo were observed in patients with higher baseline A1C or eGFR values.

Add-on Therapy with Metformin (Study DIA3006)

A total of 1284 patients with inadequate glycemic control (A1C of ≥7% to ≤10.5%) on metformin monotherapy (2,000 mg/day or at least 1,500 mg/day if higher dose not tolerated) participated in a randomized, double-blind, placebo- and active-controlled, parallel-group, 4-arm, multicentre clinical study to evaluate the efficacy of canagliflozin as add-on therapy with metformin over 26 weeks. The mean age was 55 years, 47% of patients were men, and the mean baseline eGFR was 89 mL/min/1.73 m². Patients already on metformin (N=1009) at screening with inadequate glycemic control completed a 2-week, single-blind, placebo run-in period. Other patients on metformin and another oral agent or a lower than required dose of metformin (N=275) were switched to a regimen of metformin monotherapy. After at least 8 weeks on a stable dose of metformin monotherapy, patients entered a 2-week, single-blind, placebo run-in period. Patients were randomized to the addition of canagliflozin 100 mg, canagliflozin 300 mg, sitagliptin 100 mg, or placebo, administered once daily.

As shown in Table 16, statistically significant (p<0.001) reductions in A1C, FPG, PPG, and body weight relative to placebo were observed. In addition, a greater percentage of patients achieved an A1C <7.0% compared to placebo. Statistically significant (p<0.001) reductions in systolic blood pressure were observed with canagliflozin 100 mg and 300 mg relative to placebo of -5.4 mmHg and -6.6 mmHg, respectively.

Table 16: Results from Placebo-Controlled Clinical Study of Canagliflozin as Add-on Therapy with Metformin¹

Active-Controlled Study versus Glimepiride as add-on therapy with Metformin (Study DIA3009)

A total of 1450 patients with inadequate glycemic control (A1C level of ≥7% to ≤9.5%) on metformin monotherapy (≥2,000 mg/day or at least 1,500 mg/day if higher dose not tolerated) participated in a randomized, double-blind, active-controlled, parallel-group, 3-arm, multicentre clinical study to evaluate the efficacy of canagliflozin as add-on therapy with metformin over 52 weeks. The mean age was 56 years, 52% of patients were men, and the mean baseline eGFR was 90 mL/min/1.73 m². Patients on metformin (N=928) at a stable protocol-specified dose entered a 2-week, single-blind, placebo run-in period. Other patients (N=522) entered a metformin dose titration and dose stabilization/antihyperglycemic agent washout period, immediately followed by the 2-week run-in period. Following the run-in period, patients with inadequate glycemic control were randomized to the addition of canagliflozin 100 mg, canagliflozin 300 mg, or glimepiride (titration allowed throughout the 52-week study to 6 to 8 mg), administered once daily.

As shown in Table 17 and Figure 3, after 52 weeks, treatment with canagliflozin 100 mg provided similar reductions in A1C from baseline compared to glimepiride (with the upper bound of the 95% confidence interval around the between-group difference less than the pre-specified non-inferiority margin of 0.3%); canagliflozin 300 mg provided a superior (p<0.05) reduction from baseline in A1C compared to glimepiride (with the upper bound of the 95% confidence interval below 0). Statistically significant (p<0.001) reductions in body weight were observed with canagliflozin compared to glimepiride. Reductions in systolic blood pressure were observed with canagliflozin 100 mg and 300 mg relative to glimepiride of -3.5 mmHg and -4.8 mmHg, respectively. The incidence of hypoglycemia with canagliflozin was significantly lower (p<0.001) compared to glimepiride.

Table 17: Results from 52-Week Clinical Study Comparing Canagliflozin to Glimepiride as Add-on Therapy with Metformin¹

Figure 3: Mean Changes from Baseline for A1C (%) and Body Weight Over 52 Weeks in a Study Comparing Canagliflozin to Glimepiride as Add-on Therapy with Metformin

Add-on Therapy with Metformin and Sulfonylurea (Study DIA3002)

A total of 469 patients with inadequate glycemic control (A1C level of ≥7% to ≤10.5%) on the combination of metformin (2,000 mg/day or at least 1,500 mg/day if higher dose not tolerated) and sulfonylurea (maximal or near-maximal effective dose) participated in a randomized, double-blind, placebo-controlled, parallel-group, 3-arm, multicentre clinical study to evaluate the efficacy of canagliflozin as add-on therapy with metformin and sulfonylurea over 26 weeks.

The mean age was 57 years, 51% of patients were men, and the mean baseline eGFR was 89 mL/min/1.73 m². Patients on near-maximal or maximal effective doses of metformin and sulfonylurea (N=372) entered a 2-week, single-blind, placebo run-in period. Other patients (N=97) entered a metformin and sulfonylurea dose titration and dose stabilization/antihyperglycemic agent washout period of up to 12 weeks, immediately followed by the 2-week run-in period. Following the run-in period, patients with inadequate glycemic control were randomized to the addition of canagliflozin 100 mg, canagliflozin 300 mg, or placebo administered once daily.

As shown in Table 18, statistically significant (p<0.001) reductions in A1C, FPG, and body weight relative to placebo were observed. In addition, a greater percentage of patients achieved an A1C <7.0% compared to placebo. Reductions in systolic blood pressure were observed with canagliflozin 100 mg and 300 mg relative to placebo of -2.2 mmHg and -1.6 mmHg, respectively. An increased incidence of hypoglycemia was observed in this study (see 7 WARNINGS AND PRECAUTIONS and 8 ADVERSE REACTIONS).

Table 18: Results from 26-Week Placebo-Controlled Clinical Study of Canagliflozin as Add-on Therapy with Metformin and Sulfonylurea¹

Active-Controlled Study versus Sitagliptin as Add-on Therapy with Metformin and Sulfonylurea (Study DIA3015)

A total of 755 patients with inadequate glycemic control (A1C level of ≥7.0% to ≤10.5%) on the combination of metformin (2,000 mg/day or at least 1,500 mg/day if higher dose not tolerated) and sulfonylurea (near-maximal or maximal effective dose) participated in a double-blind, active-controlled, parallel-group, 2-arm, multicentre clinical study to evaluate the efficacy of canagliflozin 300 mg as add-on therapy with metformin and sulfonylurea versus sitagliptin 100 mg as add-on therapy with metformin and sulfonylurea over 52 weeks. The mean age was 57 years, 56% of patients were men, and the mean baseline eGFR was 88 mL/min/1.73 m².

Patients on near-maximal or maximal effective doses of metformin and sulfonylurea (N=716) entered a 2-week single-blind, placebo run-in period. Other patients (N=39) entered a metformin and sulfonylurea dose titration and dose stabilization period of up to 12 weeks, immediately followed by the 2-week run-in period. Following the run-in period, patients with inadequate glycemic control were randomized to the addition of canagliflozin 300 mg or sitagliptin 100 mg.

As shown in Table 19 and Figure 4, after 52 weeks, canagliflozin 300 mg provided a superior (p<0.05) reduction in A1C compared to sitagliptin 100 mg (with the upper bound of the 95% confidence interval around the between-group difference below 0). In addition, a greater percent of patients achieved an A1C of <7.0% with canagliflozin 300 mg relative to sitagliptin: 47.6% of patients receiving canagliflozin 300 mg and 35.3% of patients receiving sitagliptin. Patients treated with canagliflozin 300 mg exhibited a significant mean decrease in percent change from baseline body weight compared to patients administered sitagliptin 100 mg. A statistically significant (p<0.001) reduction in systolic blood pressure was observed with canagliflozin 300 mg of -5.9 mmHg relative to sitagliptin. A similar increased incidence of hypoglycemia was observed with both canagliflozin 300 mg and sitagliptin in this study, consistent with the expected increase of hypoglycemia when agents not associated with hypoglycemia are added to sulfonylurea (see 7 WARNINGS AND PRECAUTIONS and 8 ADVERSE REACTIONS). The proportion of patients who met glycemic withdrawal criteria (based on FPG until Week 26 and A1C thereafter) was lower with canagliflozin 300 mg (10.6%) compared with sitagliptin 100 mg (22.5%).

Table 19: Results from 52-Week Clinical Study Comparing Canagliflozin to Sitagliptin as Add-on Therapy with Metformin and Sulfonylurea¹

Figure 4: Mean Change from Baseline for A1C (%) Over 52 Weeks in a Study Comparing Canagliflozin to Sitagliptin as Add-on Therapy with Metformin and Sulfonylurea

Add-on Therapy with Metformin and Pioglitazone (Study DIA3012)

A total of 342 patients with inadequate glycemic control (A1C level of ≥7.0% to ≤10.5%) on the combination of metformin (2,000 mg/day or at least 1,500 mg/day if higher dose not tolerated) and pioglitazone (30 or 45 mg/day) participated in a randomized, double-blind, placebo-controlled, parallel-group, 3-arm, multicentre clinical study to evaluate the efficacy of canagliflozin as add-on therapy with metformin and pioglitazone over 26 weeks. The mean age was 57 years, 63% of patients were men, and the mean baseline eGFR was 86 mL/min/1.73 m². Patients already on protocol-specified doses of metformin and pioglitazone (N=163) entered a 2-week, single-blind, placebo run-in period. Other patients (N=181) entered a metformin and pioglitazone dose titration and dose stabilization period for up to 12 weeks with at least 8 weeks on stable doses of metformin and pioglitazone, immediately followed by the 2-week run-in period. Following the run-in period, patients with inadequate glycemic control were randomized (N=344) to the addition of canagliflozin 100 mg, canagliflozin 300 mg, or placebo, administered once daily.

As shown in Table 20, statistically significant (p<0.001) reductions in A1C, baseline FPG, and body weight relative to placebo were observed for canagliflozin at Week 26. In addition, a greater percent of patients achieved an A1C of <7.0% compared to placebo. Statistically significant reductions in systolic blood pressure were observed with canagliflozin 100 mg and 300 mg relative to placebo of -4.1 mmHg (p=0.005) and -3.5 mmHg (p=0.016), respectively.

Table 20: Results from 26-Week Placebo-Controlled Clinical Study of Canagliflozin as Add-on Therapy with Metformin and Pioglitazone¹

Add-on Therapy with Insulin and Metformin (Derived from DIA3008 substudy)

A total of 1718 patients with inadequate glycemic control (A1C level of ≥7.0 to ≤10.5%) on insulin ≥30 units/day or insulin add-on therapy with other antihyperglycemic agents participated in a randomized, double-blind, placebo-controlled, parallel-group, 3-arm, multicentre substudy of a cardiovascular outcomes study; this substudy evaluated the efficacy of canagliflozin as add-on therapy with insulin over 18 weeks. The mean age was 63 years, 66% of patients were men, and the mean baseline eGFR was 75 mL/min/1.73 m². Patients on basal, bolus, or basal/bolus insulin, with the majority on a background basal/bolus insulin regimen, for at least 10 weeks entered a 2-week, single-blind, placebo run-in period. After the run-in period, patients with inadequate glycemic control were randomized to the addition of canagliflozin 100 mg, canagliflozin 300 mg, or placebo, administered once daily. The mean daily insulin dose at baseline was 83 units, which was similar across treatment groups.

A subgroup of 731 patients with inadequate glycemic control received canagliflozin in combination with metformin and ≥30 units/day of insulin over 18 weeks. As shown in Table 21, statistically significant (p<0.001) reductions in A1C, FPG, and body weight relative to placebo were observed for canagliflozin at Week 18 in patients on an insulin+metformin background. In addition, a greater percentage of patients achieved an A1C <7.0% compared to placebo. Reductions in systolic blood pressure were observed with canagliflozin 100 mg and 300 mg relative to placebo of -2.9 mmHg (p=0.011) and -4.8 mmHg (p<0.001), respectively. An increased incidence of hypoglycemia was observed in this study (see 7 WARNINGS AND PRECAUTIONS, 8 ADVERSE REACTIONS, and 4 DOSAGE AND ADMINISTRATION).

Table 21: Results from 18-Week Placebo-Controlled Clinical Study of Canagliflozin as Add-on Therapy with Insulin ≥30 Units/Day (With Insulin and Metformin)¹

Cardiovascular Outcomes (CANVAS (DIA3008) and CANVAS-R (DIA4003))

The effect of canagliflozin on cardiovascular risk in adults with type 2 diabetes who had established cardiovascular (CV) disease or were at risk for CVD (two or more CV risk factors), was evaluated in the CANVAS Program (CANVAS and CANVAS-R studies). These studies were multicenter, multi-national, randomized, double-blind, placebo-controlled parallel group, time- and event-driven, with similar inclusion and exclusion criteria and patient populations. The studies compared the risk of experiencing a Major Adverse Cardiovascular Event (MACE) defined as the composite of cardiovascular death, nonfatal myocardial infarction and nonfatal stroke, between canagliflozin and placebo on a background of standard of care treatments for diabetes and atherosclerotic cardiovascular disease. Additional pre-specified, adjudicated endpoints included CV death, fatal/non-fatal myocardial infarction, fatal/non-fatal stroke, hospitalization for heart failure, and all-cause mortality.

In CANVAS, subjects were randomly assigned 1:1:1 to canagliflozin 100 mg, canagliflozin 300 mg, or matching placebo. In CANVAS-R, subjects were randomly assigned 1:1 to canagliflozin 100 mg or matching placebo, and titration to 300 mg was permitted at the investigator’s discretion (based on tolerability and glycemic needs) at Week 13 or later visits. Concomitant antidiabetic and atherosclerotic therapies could be adjusted, at the discretion of investigators, to ensure participants were treated according to the standard care for these diseases.

A total of 10,134 patients were treated (4,327 in CANVAS and 5,807 in CANVAS-R; total of 4,344 randomly assigned to placebo and 5,790 to canagliflozin). For the integrated CANVAS trials, the mean duration of treatment was 149.2 weeks (mean of 222.8 weeks for CANVAS and 94.4 weeks for CANVAS-R) and the mean duration of study follow-up was 188.2 weeks (mean of 295.9 for CANVAS and 108.0 weeks for CANVAS-R). Vital status was obtained for 99.6% of the subjects. The proportion of subjects who completed the study was 96.0%. Approximately 78% of the study population was Caucasian, 13% was Asian, and 3% was Black. The mean age was 63 years and approximately 64% were male. All patients in the study had inadequately controlled type 2 diabetes mellitus at baseline (HbA_1c ≥7.0% to ≤10.5%). The mean HbA_1c at baseline was 8.2% and mean duration of diabetes was 13.5 years. Baseline renal function was normal or mildly impaired in 80% of patients and moderately impaired in 20% of patients (mean eGFR 77 mL/min/1.73 m²). There were 526 patients with eGFR 30-<45 mL/min/1.73 m², 1485 patients with eGFR 45-<60 mL/min/1.73 m², and 5625 with eGFR 60-<90 mL/min/1.73 m². At baseline, 99% of patients were treated with one or more antidiabetic medications including metformin (77%), insulin (50%), and sulfonylurea (43%).

Sixty-six percent of subjects had a history of established cardiovascular disease, with 56% having a history of coronary disease, 19% with cerebrovascular disease, and 21% with peripheral vascular disease; 14% had a history of heart failure. At baseline, the mean systolic blood pressure was 137 mmHg, the mean diastolic blood pressure was 78 mmHg, the mean LDL was 2.29 mmol/L, the mean HDL was 1.2 mmol/L, and the mean urinary albumin to creatinine ratio (UACR) was 115 mg/g. At baseline, approximately 80% of patients were treated with renin angiotensin system inhibitors, 54% with beta-blockers, 13% with loop diuretics, 36% with non-loop diuretics, 75% with statins, and 74% with antiplatelet agents (including aspirin).

The primary endpoint in the CANVAS Program was the time to first occurrence of a composite MACE endpoint of cardiovascular death, nonfatal myocardial infarction, or nonfatal stroke, considering all events up to individual trial completion. The MACE hazard ratio (HR) in patients treated with canagliflozin compared with placebo and its 95% CI was estimated using a stratified Cox proportional hazards regression model with stratification by study and by established cardiovascular disease (HR: 0.86; 95% CI 0.75, 0.97, p<0.0001 for non-inferiority; p=0.0158 for superiority). According to the primary hypothesis, the integrated canagliflozin treatment (CANVAS and CANVAS-R) was found to be non-inferior to placebo, since the upper bound of the 95% CI was below 1.3 and superior to placebo, since the upper bound of the 95% CI was also below 1.0. Each of the components of the MACE composite endpoint showed a similar reduction when assessed as independent endpoints (see Figure 5). Results for the 100 mg and 300 mg canagliflozin doses were consistent with results for the combined dose groups. The reduction in MACE was accounted for by the subgroup of patients with established cardiovascular disease (HR 0.82; 95% CI 0.72, 0.95) (see Figure 5), whilst the subgroup of patients with only risk factors for cardiovascular disease at baseline had a hazard ratio whose 95% confidence interval included one (HR 0.98; 95% CI 0.74, 1.30).

1. 1 P value for superiority (2-sided) = 0.0158.

Figure 5: Treatment Effect for the Primary Composite Endpoint and its Components

Based on the Kaplan-Meier plot for the first occurrence of MACE, shown below, the reduction in MACE in the canagliflozin group was observed as early as Week 26 and was maintained throughout the remainder of the study (Figure 6 and 7).

Figure 6: Time to First Occurrence of MACE (CANVAS Integrated)

Figure 7: Time to First Occurrence of MACE (Subjects with Established CV Disease)

In the CANVAS program, subjects treated with canagliflozin had a lower risk of hospitalization for heart failure compared to those treated with placebo.

Table 22: Treatment Effect for Hospitalized Heart Failure and the Composite of Cardiovascular Death or Hospitalized Heart Failure

Figure 8: Time to First Occurrence of Hospitalization of Heart Failure

15 MICROBIOLOGY

No microbiological information is required for this product.

16 NON-CLINICAL TOXICOLOGY

General Toxicology

Canagliflozin

Non-clinical data reveal no particular hazard for humans based on conventional studies of safety pharmacology, repeated dose toxicity, and genotoxicity.

Canagliflozin has relatively low acute oral toxicity, with maximum non-lethal single doses of 2000 mg/kg in mice (both sexes) and male rats, and 1000 mg/kg in female rats.

Repeat-dose oral toxicity studies were conducted in mice, rats and dogs for up to 3, 6 and 12 months, respectively. Canagliflozin was generally well tolerated up to oral doses of 4 mg/kg/day in rats and 100 mg/kg/day in mice and dogs (up to approximately 0.5, 11, and 20 times the clinical dose of 300 mg based on AUC exposure for rats, mice and dogs, respectively). The major adverse effects, observed mainly in rats, were related to the pharmacologic mode of action of canagliflozin, and these included increased urinary glucose, increased urine volume, increased urinary excretion of electrolytes, decreased plasma glucose at high dose levels, and reduced body weight. The primary targets of toxicity were the kidney and bone. In the 3-month rat study, minimal mineralization of renal interstitium and/or pelvis were observed in some animals given doses of ≥4 mg/kg/day. In the 6-month rat study, renal tubular dilatation was seen at all doses (4, 20 and 100 mg/kg/day), and an increased incidence and severity of transitional epithelial hyperplasia in the renal pelvis was observed at 100 mg/kg/day. In dogs, treatment-related tubular regeneration/degeneration and tubular dilatation occurred only at the high dose of 200/100 mg/kg/day. Trabecular hyperostosis was observed in the repeat-dose studies in rats, but not in mice and dogs. In the 2-week rat study, canagliflozin at 150 mg/kg/day caused minimal to mild hyperostosis but in 3- and 6-month rat studies, hyperostosis was detected at 4 mg/kg/day, the lowest dose tested. A 1-month mechanistic rat study showed that hyperostosis occurred in young, actively growing animals (6 to 8 weeks old, as in the toxicity studies) but not in older (6 month old) animals where bone growth has substantially slowed.

Carcinogenicity

Canagliflozin and Metformin hydrochloride Combination

No animal studies have been conducted with the combined products in INVOKAMET XR to evaluate carcinogenesis.

Canagliflozin

The carcinogenicity of canagliflozin was evaluated in 2-year studies in mice and rats at oral doses of 10, 30, or 100 mg/kg/day. Canagliflozin did not increase the incidence of tumors in male and female mice up to 100 mg/kg/day (up to 14 times the clinical dose of 300 mg based on AUC exposure).

The incidence of testicular Leydig cell tumors increased significantly in male rats at all doses tested (≥ 1.5 times the clinical dose of 300 mg based on AUC exposure). The Leydig cell tumors are associated with an increase in luteinizing hormone (LH), which is a known mechanism of Leydig cell tumor formation in rats. In a 12-week clinical study, unstimulated LH did not increase in males treated with canagliflozin.

The incidence of pheochromocytomas and renal tubular tumors increased significantly in male and female rats given high doses of 100 mg/kg/day (approximately 12 times the clinical dose of 300 mg based on AUC exposure). Canagliflozin-induced renal tubule tumors and pheochromocytomas in rats may be caused by carbohydrate malabsorption; mechanistic clinical studies have not demonstrated carbohydrate malabsorption in humans at canagliflozin doses of up to 2 times the recommended clinical dose of 300 mg.

Metformin hydrochloride

Long-term carcinogenicity studies have been performed in rats (dosing duration of 104 weeks) and mice (dosing duration of 91 weeks) at doses up to and including 900 mg/kg/day and

1500 mg/kg/day, respectively. These doses are both approximately 4 times the maximum recommended human daily dose of 2000 mg based on body surface area comparisons. No evidence of carcinogenicity with metformin was found in either male or female mice. Similarly, there was no tumorigenic potential observed with metformin in male rats. There was, however, an increased incidence of benign stromal uterine polyps in female rats treated with 900 mg/kg/day.

Genotoxicity

Canagliflozin and Metformin hydrochloride Combination

No animal studies have been conducted with the combined products in INVOKAMET XR to evaluate mutagenesis.

Canagliflozin

Canagliflozin was not mutagenic with or without metabolic activation in the Ames assay. Canagliflozin was mutagenic in the in vitro mouse lymphoma assay with but not without metabolic activation. Canagliflozin was not mutagenic or clastogenic in an in vivo oral micronucleus assay in rats and an in vivo oral Comet assay in rats.

Metformin hydrochloride

There was no evidence of a mutagenic potential of metformin in the following in vitro tests: Ames test (S. typhimurium), gene mutation test (mouse lymphoma cells), or chromosomal aberrations test (human lymphocytes). Results in the in vivo mouse micronucleus test were also negative.

Reproductive and Developmental Toxicity

Canagliflozin and Metformin hydrochloride Combination

No animal studies have been conducted with the combined products in INVOKAMET XR to evaluate impairment of fertility.

Canagliflozin

In rat fertility studies, canagliflozin had no adverse effects on mating, fertility, or early embryonic development up to the highest dose of 100 mg/kg/day (up to 19 times the clinical dose of 300 mg based on AUC exposure), although there were slight sperm morphological changes at this dose level.

Canagliflozin was not teratogenic at any dose tested when administered orally to pregnant rats and rabbits during the period of organogenesis. In both rats and rabbits, a slight increase in the number of fetuses with reduced ossification, indicative of a slight developmental delay, was observed at the high doses (approximately 19 times the clinical dose of 300 mg based on AUC exposure) in the presence of maternal toxicity.

In a pre- and postnatal development study, canagliflozin administered orally to female rats from gestation Day 6 to lactation Day 20 resulted in decreased body weights in male and female offspring at maternally toxic doses of ≥ 30 mg/kg/day (≥ 5.9 times the clinical dose of 300 mg based on AUC exposure). Maternal toxicity was limited to decreased body weight gain.

Metformin hydrochloride

Fertility of male or female rats was unaffected by metformin when administered at doses as high as 600 mg/kg/day, which is approximately 3 times the maximum recommended human daily dose of 2000 mg based on body surface area comparisons.

Metformin hydrochloride was not teratogenic in rats and rabbits at doses up to 600 mg/kg/day. This represents an exposure of about 2 and 6 times the maximum recommended human daily dose of 2,000 mg based on body surface area comparisons for rats and rabbits, respectively. Determination of fetal concentrations demonstrated a partial placental barrier to metformin.

Juvenile Toxicity

Canagliflozin

In a juvenile toxicity study in which canagliflozin was dosed orally to young rats from postnatal day (PND) 21 until PND 90 at doses of 4, 20, 65, or 100 mg/kg, increased kidney weights and a dose-related increase in the incidence and severity of renal pelvic and renal tubular dilatation were reported at all dose levels. Exposure at the lowest dose tested was approximately 0.5 times the maximum recommended clinical dose of 300 mg. The renal pelvic dilatations observed in juvenile animals did not fully reverse within the 1-month recovery period. Persistent renal findings in juvenile rats can most likely be attributed to reduced ability of the developing rat kidney to handle canagliflozin-increased urine volumes, as functional maturation of the rat kidney continues through 6 weeks of age. Additionally, shortened ulna growth and delays in sexual maturation were observed in juvenile rats at doses that were greater than or equal to 3 times and 9 times the clinical dose of 300 mg based on AUC exposure, respectively.