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Medication guide

Bupropion SR (Smoking Cessation)

Helps adults quit smoking with behavioural support.

Check the name, strength and form on your own prescription or package.

Brand
Zyban
Form
Zyban sustained-release tablets
Guidance checked
2026-09-08

About this medication

Helps adults quit smoking with behavioural support.

How to use it

Begin before the quit date as prescribed. Swallow whole; keep prescribed doses at least eight hours apart and never double a missed dose.

Pregnancy and breastfeeding

Discuss pregnancy or breastfeeding individually.

Before you use it

Avoid seizure/eating disorders, abrupt alcohol/sedative withdrawal and other bupropion products.

Possible side effects

Insomnia, dry mouth and dizziness.

When to get help

Seizures or new suicidal thoughts require urgent help; monitor blood pressure.

Other medicines and products

MAOIs and medicines lowering seizure threshold are important interactions.

Missed doses, storage and accidental exposure

Follow your own product’s missed-dose instructions. If you are unsure, ask the Care365 clinical team 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.

References and product information

Sources checked .

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.

These practical points come from the Pharmasist patient handout for the same product monograph cited by this guide.

This is a plain-language guide, not the complete monograph. Match the name, strength and form on your package before using product-specific directions.

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