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Care365 medication guide
Varenicline
Helps adults quit smoking alongside counselling.
Drug information
Uses, directions and safety information for Varenicline.
What it is used for
Helps adults quit smoking alongside counselling.
How to use it
Titrate as prescribed and take after food with water. Kidney impairment can change the regimen.
Before use
Review mental-health history, seizures and kidney function.
Possible side effects
Nausea, vivid dreams and insomnia.
When to get medical help
New suicidal thoughts, seizures, severe rash or harmful sleepwalking require urgent assessment.
Medicines and interactions
Review cimetidine and other cessation medicines; stopping smoking itself can alter other drug levels.
Pregnancy and breastfeeding
Discuss alternatives during pregnancy or breastfeeding.
Missed doses, storage and accidental exposure
Follow your own product’s missed-dose instructions. If you are unsure, ask a pharmacist before taking an extra dose. Contraceptives, injections and modified-release medicines may need a specific plan.
Keep the original packaging and follow its storage, expiry and disposal instructions. Keep medicines away from children and pets. Ask about refrigeration, after-opening limits and safe sharps disposal when relevant.
For suspected overdose or accidental swallowing, contact poison control or urgent medical care promptly. Call emergency services for breathing difficulty, collapse or a seizure.
Care that starts with a conversation
How Care365 can help
Explore care for your symptoms and prepare for a conversation about treatment. Your healthcare professional will consider your history, current medicines and whether an assessment or referral is appropriate.
Your next steps
Know what to prepare and what to discuss.
Share your history
Prepare your symptoms, allergies, medication list and treatment questions.
Discuss your options
A healthcare professional assesses which care or referral is appropriate.
Plan your follow-up
Follow the advice you receive about treatment, monitoring and next steps.
Related condition guides
Learn about concerns where this medication may be discussed. Treatment depends on your individual assessment.
Prescription renewal and medication review
For a review of Varenicline, have your current dose, reason for treatment, remaining supply, benefits, side effects and pharmacy details ready. Ask your pharmacist or prescriber whether a renewal assessment is available and appropriate. A prescription or renewal is not guaranteed.
Questions about Varenicline
What is Varenicline used for?
Helps adults quit smoking alongside counselling.
How should I use Varenicline?
Titrate as prescribed and take after food with water. Kidney impairment can change the regimen.
What side effects can Varenicline cause?
Nausea, vivid dreams and insomnia.
When should I get medical help while using Varenicline?
New suicidal thoughts, seizures, severe rash or harmful sleepwalking require urgent assessment.
Can Varenicline interact with other medicines?
Review cimetidine and other cessation medicines; stopping smoking itself can alter other drug levels.
What should I know about Varenicline during pregnancy or breastfeeding?
Discuss alternatives during pregnancy or breastfeeding.
Sources and product information
Sources checked 2026-09-08. Safety sections are highlights; consult the full product information for complete warnings and instructions.
Check the Canadian Drug Product Database by product name or DIN for current product information.
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