Patient Medication Information: uses, side effects, how to take - NB-Irbesartan
Serious warnings and precautions
NB-Irbesartan should not be used during pregnancy. Taking NB-Irbesartan during pregnancy can cause injury or even death to your baby. If you discover that you are pregnant while taking NB-Irbesartan, stop the medication and contact your healthcare professional as soon as possible.
What NB-Irbesartan is used for:
- NB-Irbesartan is used in adults to lower high blood pressure. It can be used alone or together with a thiazide diuretic (a ‘water pill’)
- If you have high blood pressure, type 2 diabetes and kidney disease, NB-Irbesartan may help to protect kidney function.
How NB-Irbesartan works:
NB-Irbesartan is an angiotensin receptor blocker (ARB). It lowers blood pressure. This medicine does not cure your disease. It helps to control it. Therefore, it is important to continue taking NB-Irbesartan regularly even if you feel fine.
The ingredients in NB-Irbesartan are:
Medicinal ingredient(s): Irbesartan
Non-medicinal ingredients: Cellulose microcrystalline, croscarmellose sodium, hydroxypropylcellulose, hypromellose, lactose monohydrate, magnesium stearate, polyethylene glycol, silica colloidal anhydrous, talc, titanium dioxide.
NB-Irbesartan comes in the following dosage form(s):
Oval tablets: 75mg, 150 mg, and 300 mg of irbesartan.
Do not use NB-Irbesartan if:
- you are allergic to irbesartan or to any non-medicinal ingredient in the formulation.
- you have experienced an allergic reaction (angioedema) with swelling of the hands, feet, or ankles, face, lips, tongue, throat, or sudden difficulty breathing or swallowing, to any ARB. Be sure to tell your healthcare professional that this has happened to you.
you have diabetes or kidney disease and are already taking:
- a blood pressure-lowering medicine that contains aliskiren (such as Rasilez); or
- an angiotensin converting enzyme (ACE) inhibitor. You can recognize ACE inhibitors because their medicinal ingredient ends in ‘-PRIL’.
- you are pregnant or intend to become pregnant. Taking NB-Irbesartan during pregnancy can cause injury and even death to your baby
- you are breastfeeding. It is possible that NB-Irbesartan passes into breast milk.
you have one of the following rare hereditary diseases:
- Galactose intolerance,
- Lapp lactase deficiency, or
- Glucose-galactose malabsorption,
because lactose is a non-medicinal ingredient in NB-Irbesartan.
NB-Irbesartan is not for use in children and adolescents (under the age of 18 years).
To help avoid side effects and ensure proper use, talk to your healthcare professional before you take NB-Irbesartan. Talk about any health conditions or problems you may have, including if you:
- have experienced an allergic reaction to any drug used to lower blood pressure including angiotensin converting enzyme (ACE) inhibitors.
- have narrowing of an artery or a heart valve.
- have had a heart attack or stroke.
- have heart failure.
- have liver or kidney disease.
- have diabetes. NB-Irbesartan may cause low blood sugar levels.
- have psoriasis or a history of psoriasis.
- are on dialysis.
- are dehydrated or suffer from excessive vomiting, diarrhea, or sweating.
- are taking a salt substitute that contains potassium, potassium supplements, or a potassium-sparing diuretic (a specific kind of “water pill” that makes your body keep potassium).
- are on a low-salt diet.
- are taking a medicine that contains aliskiren, such as RASILEZ, used to lower high blood pressure. The combination with NB-Irbesartan is not recommended.
are taking an angiotensin converting enzyme (ACE) inhibitor. The combination with NB-
Irbesartan is not recommended.
- are taking a medicine that contains lithium. The combination with NB-Irbesartan is not recommended.
Other warnings you should know about:
Before surgery and general anesthesia (even at the dentist’s office), tell the doctor or dentist that you are taking NB-Irbesartan, as there may be a sudden fall in blood pressure associated with general anesthesia.
Allergic reactions: Allergic reactions (swelling of areas of tissue under the skin, sometimes affecting the face and throat, hives and severe allergic reactions) have been reported. Stop taking NB-Irbesartan and get immediate medical help if you experience any symptoms of an allergic reaction.
Driving and using machines: Before you perform tasks, which may require special attention, wait until you know how you respond to NB-Irbesartan. Dizziness, lightheadedness, or fainting can occur, especially after the first dose and when the dose is increased.
Tell your healthcare professional about all the medicines you take, including any drugs, vitamins, minerals, natural supplements, or alternative medicines.
The following may interact with NB-Irbesartan:
- Agents increasing serum potassium, such as a salt substitutes that contain potassium, potassium supplements or a potassium-sparing diuretic (a specific kind of “water pill”).
- Lithium used to treat bipolar disease.
Nonsteroidal anti-inflammatory drugs (NSAIDs), used to reduce pain and swelling.
Examples include ibuprofen naproxen, and celecoxib.
- Blood pressure-lowering drugs, including diuretics (“water pills”), aliskiren-containing products (e.g. Rasilez), or angiotensin converting enzyme (ACE) inhibitors.
- Certain medications tend to increase your blood pressure, for example, preparations for appetite control, asthma, colds, coughs, hay fever and sinus problems.
- Medicines used to lower blood sugar levels, including insulin and oral medicines, such as repaglinide.
How to take NB-Irbesartan:
- Take NB-Irbesartan every day exactly as prescribed.
- It is recommended to take your dose at about the same time every day.
NB-Irbesartan may be taken with or without food.
Usual dose:
Recommended Initial Dose: 150 mg once a day.
Your healthcare professional can increase the dosage to 300 mg once daily if required.
The 300 mg and 150 mg Tablets may be split for ease of swallowing. Tablets should not be split to provide a lower dose. Both halves of a split tablet are to be taken at the same time.
Overdose:
If you think you, or a person you are caring for, have taken too much NB-Irbesartan, contact a healthcare professional, hospital emergency department, regional poison control centre, or Health Canada’s toll-free number, 1-844 POISON-X (1-844-764-7669) immediately, even if there are no signs or symptoms.
Missed dose:
If you have forgotten to take your dose during the day, carry on with the next dose at the usual time. Do not double the dose.
Possible side effects from using NB-Irbesartan:
These are not all the possible side effects you may have when taking NB-Irbesartan. If you experience any side effects not listed here, contact your healthcare professional.
Side effects may include:
- dizziness;
- drowsiness, insomnia, being tired;
- rash;
- diarrhea, vomiting;
- abdominal pain;
- nausea;
- headache;
- back or leg pain, muscle cramps;
- lightheadedness;
- ringing in the ears.
NB-Irbesartan can cause abnormal blood test results. Your healthcare professional will decide when to perform blood tests and will interpret the results.
Serious side effects and what to do about them
| Frequency/Side Effect/Symptom | Talk to your healthcare professional | Stop taking this drug | |||||
| Only if severe | In all cases | and get immediate | |||||
| medical help | |||||||
| Common | |||||||
| Increased levels of creatine phosphokinase: blood tests may show raised levels of an enzyme that measures breakdown of muscle (creatine phosphokinase) | ✓ | ||||||
| Increased levels of potassium in the blood: irregular heartbeats, muscle weakness, generally feeling unwell | ✓ | ||||||
| Uncommon | |||||||
| Edema: unusual swelling of arms, hands, legs, ankles, or feet, face, or air passages | ✓ | ||||||
Hypotension (low blood pressure): dizziness, fainting, light- headedness. May occur when you go from lying or sitting to standing up. | ✓ | ||||||
| Kidney problems: change in frequency of urination, nausea, vomiting, swelling of extremities, fatigue | ✓ | ||||||
| Liver problems: yellowing of the skin or eyes, dark urine, abdominal pain, nausea, vomiting, loss of appetite | ✓ | ||||||
| Tachycardia (abnormally fast heartbeat) | ✓ | ||||||
| Rare | |||||||
| Allergic reaction: rash, hives, | ✓ | ||||||
| Frequency/Side Effect/Symptom | Talk to your healthcare professional | Stop taking this drug | |||||
| Only if severe | In all cases | and get immediate | |||||
| medical help | |||||||
| swelling of the face, lips, tongue or throat, difficulty swallowing or breathing | |||||||
| Intestinal angioedema (swelling of the blood vessels in the intestines): abdominal pain, nausea, vomiting, diarrhea, bloating, cramping | ✓ | ||||||
| Rhabdomyolysis: (breakdown of damaged muscle): muscle pain that you cannot explain, muscle tenderness or weakness, dark brown urine | ✓ | ||||||
| Very Rare | |||||||
| Decreased platelets: bruising, bleeding, fatigue and weakness, small purple or red dots under the skin | ✓ | ||||||
| Unknown | |||||||
| Anemia (decreased number of red blood cells): fatigue, loss of energy, looking pale, weakness, shortness of breath | ✓ | ||||||
| Low blood sugar: sweating, weakness, hunger, dizziness, trembling, headache | ✓ | ||||||
| Skin problems: psoriasis, increased skin sensitivity to sunlight | ✓ | ||||||
If you have a troublesome symptom or side effect that is not listed here or becomes bad enough to interfere with your daily activities, tell your healthcare professional.
Reporting Side Effects
You can report any suspected side effects associated with the use of health products to Health Canada by:
- Visiting the Web page on Adverse Reaction Reporting (canada.ca/drug-device-reporting) for information on how to report online, by mail or by fax; or
- Calling toll-free at 1-866-234-2345.
NOTE: Contact your healthcare professional if you need information about how to manage your side effects. The Canada Vigilance Program does not provide medical advice.
Storage:
Store NB-Irbesartan tablets at room temperature (15°C to 30°C).
Keep out of reach and sight of children.
If you want more information about NB-Irbesartan:
- Talk to your healthcare professional
- Find the full Product Monograph that is prepared for healthcare professionals and includes the Patient Medication Information by visiting the Health Canada Drug Product Database website (https://www.canada.ca/en/health-canada/services/drugs-health-products/drug-products/drug-product-database.html); the manufacturer’s website www.nbpharmainc.com, or by calling 1 855-662-1814.
Date of Authorization: 2026-04-21