Patient Medication Information: uses, side effects, how to take - ZDS-Varenicline
What is the most important information I should know about ZDS-Varenicline?
When you try to quit smoking, with or without ZDS-Varenicline, you may have symptoms that may be due to nicotine withdrawal, including
- the urge to smoke
- depressed mood
- trouble sleeping
- irritability
- frustration
- anger
- feeling anxious
- difficulty concentrating
- restlessness
- decreased heart rate
- increased appetite or weight gain.
Some people have even experienced suicidal thoughts when trying to quit smoking without medication. Sometimes quitting smoking can lead to worsening of mental health problems that you already have, such as depression.
Mental Health Problems
Some people have had serious side effects while taking ZDS-Varenicline to help them quit smoking, including changes in behavior or thinking, hostility, agitation, aggression, depressed mood, or suicidal thoughts or actions. These symptoms have occurred in people with previous mental health problems, as well as in those with no previous history. For some people, these symptoms began when they started taking ZDS-Varenicline while for others, they began after several weeks of treatment, or shortly after stopping ZDS-Varenicline.
Before taking any quit-smoking treatment, including ZDS-Varenicline, tell your healthcare provider (doctor, pharmacist or nurse):
- if you have ever had depression or other mental health problems;
- about any concerning symptoms you had during other times you tried to quit smoking, with or without medication.
Inform your friends and family members of your quit attempt with ZDS-Varenicline and ask for their support and help in monitoring for any changes in behavior or thinking that are not normal.
Drinking alcohol may increase the risk of having mental health problems during your treatment with ZDS-Varenicline.
Patients with history of mental health problems (e.g. depression, anxiety, schizophrenia): If you have had mental health problems before taking ZDS-Varenicline, your healthcare provider will monitor you while you try to quit smoking with ZDS-Varenicline. If you develop
worsened or new symptoms, talk to your healthcare provider right away because changing the dose (of ZDS-Varenicline or other medications) may make a difference.
All patients/General: If you have thoughts, moods or behaviours that are severe, concerning or very abnormal for you, stop taking ZDS-Varenicline right away, seek medical help, and tell your healthcare provider about your symptoms. In many people, these symptoms went away after stopping ZDS-Varenicline, but not in all. It is important for you to follow up with your healthcare provider until your symptoms go away.
Allergic Reactions
Some people can have allergic reactions to ZDS-Varenicline. Some of these allergic reactions can be life-threatening and include: swelling of the face, mouth, and throat that can cause trouble breathing. If you have these symptoms, stop taking ZDS-Varenicline and seek immediate emergency medical attention.
Serious Skin Reactions
Some people can have serious skin reactions while taking ZDS-Varenicline. These can include rash, swelling, redness, and peeling of the skin. Some of these reactions can become life-threatening. If you have a rash with peeling skin or blisters in your mouth, around the eyes or genitals, stop taking ZDS-Varenicline and seek immediate emergency medical attention.
ABOUT THIS MEDICATION
What the medication is used for:
ZDS-Varenicline is a prescription medicine which is used in combination with supportive counselling to help motivated adults stop smoking.
What it does:
ZDS-Varenicline can help to relieve the craving and withdrawal symptoms associated with stopping smoking.
ZDS-Varenicline does not contain nicotine, but it has been shown to affect the nicotine receptor in the brain that is thought to be most related to smoking addiction. ZDS-Varenicline can affect this receptor in two opposite ways: it acts like a weaker version of nicotine, and also blocks nicotine from getting to the receptor because it binds more tightly. Although it is thought that this may be, in part, how ZDS-Varenicline works, it is not known exactly how the drug works in people.
When it should not be used:
Do not take ZDS-Varenicline if you:
- are allergic (hypersensitive) to varenicline tartrate or any of the other ingredients of ZDS-Varenicline (see list below of non-medicinal ingredients).
- are using nicotine replacement therapy, such as patches, gum or inhaler. The combination of ZDS-Varenicline and nicotine replacement therapy is not expected to improve your chances of quitting, and may result in more side effects than with ZDS-Varenicline alone.
What the medicinal ingredient is:
Varenicline tartrate.
What the nonmedicinal ingredients are:
The nonmedicinal ingredients are colloidal silicon dioxide, croscarmellose sodium, dibasic calcium phosphate anhydrous, hypromellose, magnesium stearate, microcrystalline cellulose, titanium dioxide and triacetin. The 1 mg tablet also contains FD&C blue #1 aluminum lake.
What dosage forms it comes in:
ZDS-Varenicline is available as coated tablets. The 0.5 mg tablets are white to off-white and the 1 mg tablets are light blue to blue.
WARNINGS AND PRECAUTIONS
BEFORE you use ZDS-Varenicline talk to your healthcare provider if you:
- have experienced depression or any other mental health problems. Your healthcare provider will monitor you for new or worsened emotional or behavioral problems during treatment with ZDS-Varenicline.
- have any problems with your kidneys, as you may need a lower dose of ZDS-Varenicline.
- have heart or blood vessel (cardiovascular) problems.
- have a history of seizures.
- have any other medical conditions.
- are pregnant, are breastfeeding or plan to become pregnant (see “Pregnancy” and “Breastfeeding” below).
- have diabetes. ZDS-Varenicline can potentially affect your blood sugar regulation, and you may need to monitor your blood sugar more often. If you notice changes, discuss this with your healthcare provider.
The effects of changes in your body resulting from stopping smoking, with or without treatment with ZDS-Varenicline, may alter the way other drugs work. Tell your healthcare provider about all your other medicines, including prescription and nonprescription medicines, vitamins and herbal supplements. Especially, tell your healthcare provider if you take:
o Insulin
o Asthma medicines (theophylline)
o Blood thinner (warfarin)
as an adjustment of the dose of these medicines may be necessary once you are smoke-free.
Mental Health Symptoms
See “What is the most important information I should know about ZDS-Varenicline?”
Pregnancy
Talk to your healthcare provider if you are pregnant or planning to become pregnant.
You should not take ZDS-Varenicline while you are pregnant. It is unknown if ZDS-Varenicline will harm your unborn baby.
It is best to stop smoking before you get pregnant.
Breastfeeding
You should ask your healthcare provider for advice before taking any medication, including ZDS-Varenicline, if you are breastfeeding, as the medicine may pass into breast milk.
ZDS-Varenicline is not recommended for use in children under 18 years of age.
Accidental Injury, including while Driving,
Operating Machinery
Do not engage in potentially hazardous tasks, such as driving a car or operating dangerous machines, until you know how ZDS-Varenicline may affect you. In some cases, people have reported sleepiness, dizziness, blackouts, seizures or difficulty concentrating while driving.
Seizures
Tell your healthcare provider if you have experienced seizures or have epilepsy before you start ZDS-Varenicline treatment. Some people have reported seizures while taking varenicline, both with and without a history of seizures.
Heart or Stroke Events
New or worse heart or blood vessel (cardiovascular) problems have been reported in people taking varenicline, primarily in those who already have
cardiovascular problems. From the information available to date, it is not possible to determine whether ZDS-Varenicline increases the risk of heart or stroke events.
Tell your healthcare provider if you have any changes in cardiovascular symptoms during treatment with ZDS-Varenicline. Get emergency medical help right away if you have symptoms of a heart attack, including any of the following:
- Chest discomfort (uncomfortable pressure, squeezing, fullness or pain) that lasts more than a few minutes, or that goes away and comes back.
- Pain or discomfort in one or both arms, back, neck, jaw or stomach.
- Shortness of breath, sweating, nausea, vomiting, or feeling lightheaded associated with chest discomfort.
Get emergency medical help right away if you have symptoms of a stroke, including any of the following:
Weakness - Sudden loss of strength or sudden numbness in the face, arm or leg even if temporary.
- Trouble speaking - Sudden difficulty speaking or understanding or sudden confusion, even if temporary.
- Vision problems - Sudden trouble with vision, even if temporary.
- Headache - Sudden severe and unusual headache.
- Dizziness - Sudden loss of balance, especially with any of the above signs.
Sleepwalking
Sleepwalking has been reported in patients taking ZDS-Varenicline, and may sometimes lead to behaviour that is harmful to you or other people or property. Stop taking ZDS-Varenicline and tell your healthcare provider if you start
sleepwalking.
INTERACTIONS WITH THIS MEDICATION
Drinking alcohol during treatment with ZDS-Varenicline may increase the risk of mental health symptoms.
Reported experiences include:
- unusual or sometimes aggressive behavior;
- more intoxicated than expected from the amount of alcohol;
- no memory of things that have happened.
Use of ZDS-Varenicline with other therapies for smoking-cessation:
The safety and benefits of taking ZDS-Varenicline in combination with other medicines for stopping smoking have not been studied. Taking ZDS-Varenicline in combination with other smoking-cessation therapies (e.g., nicotine replacement therapy) is therefore not recommended. Using ZDS-Varenicline in combination with nicotine replacement therapies (e.g., patch gum or inhaler) is not likely to increase your chances of quitting smoking, and it may result in more side effects than with ZDS-Varenicline alone.
PROPER USE OF THIS MEDICATION
You are more likely to stop smoking if you are motivated to stop. Your healthcare provider can provide advice, support and sources of further information to help ensure your attempt to stop smoking is successful.
To increase the chances of success, ZDS-Varenicline should be used in combination with supportive counselling as recommended by your healthcare provider. Varenicline was used in combination with supportive counselling in the clinical trials. At any time, you can also call government- funded toll-free provincial Quit Lines, to speak to a knowledgeable and supportive specialist; these phone numbers are available on the Health Canada website.
Always take ZDS-Varenicline exactly as your healthcare provider has told you. You should check with your healthcare provider if you are not sure.
REMEMBER: This medication has been prescribed specifically for you. Do not give it to anyone else.
Setting Your Quit Date:
Starting treatment before your quit date lets ZDS-Varenicline build up in your body. You can keep smoking until your quit date.
There are three ways to set your quit date when using ZDS-Varenicline. Talk to your healthcare provider about which way is best for you:
- Fixed quit approach: Set a quit date when you will stop smoking. Start taking ZDS-Varenicline 8 to 14 days (1 to 2 weeks) before your quit date. You should take ZDS-Varenicline for 12 weeks. After 12 weeks of treatment, your healthcare provider may recommend an additional 12 weeks of treatment.
Or
- Flexible quit approach: Start taking ZDS-Varenicline, then quit smoking between Day 8 and Day 35 after the start of your treatment (i.e. between Weeks 2 and 5). You should take ZDS-Varenicline for 12 weeks. After 12 weeks of treatment, your healthcare provider may recommend an additional 12 weeks of treatment.
Or
- Gradual quit approach: Start taking ZDS-Varenicline and reduce smoking with a goal to quit smoking by end of 12 weeks of treatment. For example, reduce smoking by half by the 4th week, another half by the 8th week (down to 25%) and then quit by the end of the 12th week. You may quit any time before the end of 12 weeks of treatment, if you are able to. Continue treatment for an additional 12 weeks for a total of 24 weeks.
- Write down, and keep in a visible or convenient place (for example on the fridge or on the ZDS-Varenicline pack), the date that you started ZDS-Varenicline, your quit date, and the date to stop taking ZDS-Varenicline.
Make sure that you try to stop smoking on your quit date. If you slip-up and smoke after that target date, keep trying. Some people need a few weeks on ZDS-Varenicline for it to work best.
Dosing Options:
ZDS-Varenicline should be taken after eating and with a full glass of water.
Regardless of which dose is prescribed, the first week on ZDS-Varenicline is the same, and is described in the following table:
Week 1 Dosing Schedule:
| Day | Dose |
|---|---|
| Day 1 to 3 | Take one white to off-white ZDS-Varenicline 0.5 mg tablet once a day. |
| Day 4 to 7 | Take one white to off-white ZDS-Varenicline 0.5 mg tablet twice a day, once in the morning and once in the evening, at about the same time each day. |
After the first week, your healthcare provider may recommend to stay at 0.5 mg twice a day (OPTION 1) or go up to 1 mg twice a day (OPTION 2).
Week 2 (day 8) to the end of treatment
OPTION 1: Continue on 0.5 mg twice a day
| Day | Dose | |
|---|---|---|
| Day 8- end of treatment | 0.5 mg twice a day: Continue to take one white to off white ZDS-Varenicline 0.5 mg pill in the morning, and one in the evening, at about the same time | |
| each day | ||
Or
OPTION 2: Start taking 1 mg twice a day
| Day | Dose |
|---|---|
| Day 8- end of treatment | 1 mg twice a day: Take one light blue to blue ZDS-Varenicline 1 mg pill in the morning, and one in the evening, at about the same time each day. |
The maximum dose of ZDS-Varenicline is 1 mg twice a day.
Based on the limited data available, the two doses do not appear different in terms of either quit rates, or rates of serious mental health side effects (your healthcare provider can provide more information).
Discussion with your healthcare provider is important in order to choose the dose that is best for you.
If needed, the dose can be changed depending on how well you tolerate ZDS-Varenicline and how effective your healthcare provider and you consider it is in helping you quit smoking. Your healthcare provider will help decide what dose is right for you.
Your healthcare provider may recommend to gradually lower the dose at the end of the treatment period rather than stopping abruptly.
Can I smoke while taking ZDS-Varenicline?
You can keep smoking prior to your quit date.
Smoking after your quit date will reduce your chance of breaking your smoking addiction.
Some people have reported a change in the taste of cigarettes after starting ZDS-Varenicline
Overdose:
If you think you, or a person you are caring for, have taken too much ZDS-Varenicline, 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:
Do not take a double dose to make up for a forgotten tablet. It is important that you take ZDS-Varenicline regularly at the same time each day. If you forget to take a dose, take it as soon as you remember, as long as it is within a few hours of the missed dose. If it has been longer than a few hours since the missed dose, or if you do not remember whether you took a dose or not, then skip that dose, and wait to take the next dose at the correct time.
If you have any further questions on the use of this product, ask your healthcare provider.
SIDE EFFECTS AND WHAT TO DO ABOUT
Whether you are taking medication to stop smoking or not, the following are symptoms you may feel: depressed, short-tempered, frustrated or angry, nervous, impatient; have difficulty concentrating.
Your appetite may increase, and you may gain some weight.
Like all medicines, ZDS-Varenicline can cause side effects, although not everybody gets them.
The common side effects are mostly mild to moderate and these usually occur in the first weeks of treatment.
Some of the most common side effects you should be aware of include:
- Nausea, vomiting
- Trouble sleeping
- Headache
- Abnormal dreams (vivid, unusual, or increased dreaming; rarely may include nightmares)
- Sleepiness, tiredness, dizziness
- Constipation, diarrhea, gas
Mental Health Problems
See “What is the most important information I should
know about ZDS-Varenicline?”
Stop taking ZDS-Varenicline if you experience severe or unusual feelings of agitation, aggression, depressed mood, hostility, hallucinations, or if you have thoughts of self-harm or harm to others. Tell your healthcare provider about your symptoms.
Allergic Reactions
Some people have allergic reactions to ZDS-Varenicline. Some of these allergic reactions can be life-threatening and include: swelling of the face, mouth (lips, gums, tongue), and throat can cause trouble breathing. If you have these symptoms, stop taking ZDS-Varenicline and seek immediate emergency medical attention.
Serious Skin Reactions
Some people can have serious skin reactions while taking ZDS-Varenicline. These can include rash, swelling, redness, and peeling of the skin. Some of these reactions can become life-threatening. If you have a rash with peeling skin, or blistering of the mouth, around the eyes or genitals, stop taking ZDS-Varenicline and seek immediate emergency medical attention.
Serious Side Effects and What To Do About Them
| Symptom / effect | Talk to your healthcare professional | Stop taking drug and get immediate medical help | ||
|---|---|---|---|---|
Only if severe | In all cases | |||
| Rare | Allergic reaction redness, itching or swelling of your skin, hives, burning, stinging, swelling of the neck area, or any difficulty with breathing, not present before using this medicine | √ | ||
| Rare | Serious skin | √ | ||
| reactions peeling of the skin, or rash combined with blisters around the mouth, eyes or genitals. | ||||
| Rare | Mental Health Problems | √ | √ (if severe, or if involves potential for harm to self or others) | |
| Unknown | Heart attack: chest pain often associated with left shoulder or jaw pain, feeling of constriction around chest and sweating | √ | ||
| Unknown | Stroke: weakness and/or loss of sensation of limbs or face, difficulty speaking, clumsiness, visual loss | √ | ||
| Unknown | Seizures: Loss of consciousness with uncontrollable shaking (convulsion) | √ | ||
| Unknown | Sleepwalking | √ (and stop | ||
taking ZDS-Vareni cline) | ||||
This is not a complete list of side effects. For any unexpected effects while taking ZDS-Varenicline, contact your doctor or pharmacist.
HOW TO STORE IT
Store ZDS-Varenicline at room temperature (15°C to 30°C).
Keep out of the reach and sight of children.
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
(https://www.canada.ca/en/health-canada/services/drugs-health-
products/medeffect-canada/adverse-reaction-reporting.html) for information on how to report online, by mail or by fax; or
- Calling toll-free at 1-866-234-2345.
NOTE: Contact your health professional if you need information about how to manage your side effects. The Canada Vigilance Program does not provide medical advice.
MORE INFORMATION
If you want more information about ZDS-Varenicline:
- Talk to your healthcare professional
- Find the full Product Monograph that is prepared for healthcare professionals and includes this Consumer Information by visiting the Health Canada website (https://www.canada.ca/en/health-canada/services/drugs-health-products/drug-products/drug-product-database.html); the manufacturer’s by calling 1-877-716-5599.
Zydus Lifesciences Ltd.
Ahmedabad-382213,
India
Imported by:
Zydus Pharmaceuticals (Canada) Inc.
2425 Matheson Blvd E, Suite-602
ON L4W 5K4