How does varenicline work?
Varenicline targets nicotine receptors in the brain, reducing the pleasurable effects of smoking while easing withdrawal symptoms. This helps make quitting smoking easier.
What is varenicline used to treat?
Varenicline is commonly prescribed for:
- Helping people stop smoking (as part of a structured quit plan)
- Reducing nicotine cravings and withdrawal symptoms
Who can take varenicline?
Varenicline is suitable for most adults who want to quit smoking, as prescribed by a doctor.
Who might not be able to take varenicline?
Varenicline may not be suitable if you:
- Have a history of mental health conditions, such as depression or anxiety
- Have kidney disease (dose adjustments may be needed)
- Are pregnant or breastfeeding
- Have had previous serious side effects from varenicline
Can I take varenicline if I’m pregnant or breastfeeding?
Varenicline isn’t usually recommended during pregnancy or breastfeeding, as its effects on unborn babies and infants are not fully understood. Speak to your doctor about alternative treatments.
What if I miss a dose?
If you forget a dose, take it as soon as you remember. If it’s close to your next dose, skip the missed one—do not take two doses at once.
How effective is varenicline?
Varenicline is highly effective at helping people quit smoking when used alongside a structured quitting plan and behavioural support.
What should I do if I take too much?
Taking too much varenicline can cause nausea, dizziness, vomiting, or mood changes. If you think you’ve taken too much, seek medical advice immediately.
What dose of varenicline is usually taken?
- Day 1 to 3: 0.5mg once daily
- Day 4 to 7: 0.5mg twice daily
- From Day 8 onwards: 1mg twice daily for 12 weeks
Your doctor will determine the correct dose based on your needs and treatment plan.
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What are the side effects of varenicline?
Common side effects include:
- Nausea
- Headache
- Difficulty sleeping (insomnia or vivid dreams)
- Dizziness
Serious side effects, such as mood changes, suicidal thoughts, or severe allergic reactions, require urgent medical attention.
How should I take varenicline?
Varenicline is taken as tablets, usually for 12 weeks, with or without food.
When should varenicline be taken?
Varenicline should be taken at the same time each day, usually in the morning and evening.
What are the brand names for varenicline?
Varenicline is available under the brand name:
- Champix
Final thoughts
Varenicline is an effective treatment for quitting smoking, but it should be taken exactly as prescribed. Combining it with behavioural support can improve your chances of success. If side effects occur, speak to your doctor or pharmacist.
