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Varenicline
Pronounced vah-REN-i-kleen
Brand names: Chantix
Type: Smoking cessation medicine · All Other Medicines
What Varenicline is used for
- Helping people quit smoking
- Reducing nicotine craving during quit attempts
◆ Kidney note
Dose is lowered when kidney function is severely reduced.
Common side effects
- Nausea
- Vivid or abnormal dreams
- Headache
- Trouble sleeping
- Constipation
Important cautions
- Mood and behavior changes have been reported — new agitation, depression, or suicidal thoughts should be reported promptly
- Quitting smoking changes how several medicines are handled by the body, so doses of some drugs (such as insulin or blood thinners) may need review after quitting
How it comes
Tablets, nasal spray (for dry eye, a separate product). This guide lists forms only — it never lists strengths or doses.
Related medicines — Other Medicines
Please note: This page is a patient-education summary, not medical advice, and it deliberately contains no doses. Medicines affect everyone differently — always follow your own prescription and talk to your doctor or pharmacist before starting, stopping or changing any medicine.