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Chantix Side Effects Center
Medically reviewed by Dr. Otari Nergadze, Neurosurgeon | Updated: January 2026
Chantix (Varenicline) side effects drug center
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Chantix Side Effects Center
What Is Chantix?
Chantix (varenicline) is a partial agonist selective for a4ß2 nicotinic acetylcholine receptor subtypes used for cessation of smoking.
What Are Side Effects of Chantix?
Common side effects of Chantix include
- nausea (may persist for several months),
- stomach pain,
- indigestion,
- constipation,
- gas,