The drug name for Chantix is varenicline. This drug is taken orally to help people stop smoking. It is usually taken one or two times per day with food and water. People typically start taking this medication one week before they want to quit smoking. It can take several weeks before users feel the full effect of the drug. Most people do not take the drug for more than 12 weeks. As with any medication, Chantix must be taken with your doctor's approval and exactly as prescribed.
Common Side Effects
Chantix can cause digestive issues such as gas, constipation, nausea, vomiting and heartburn. Chantix can also cause a bad taste in the mouth, headaches, difficulty staying or falling asleep, unusual nightmares or dreams, fatigue or drowsiness and changes in appetite. Many people find these side effects to be minimal.
Serious Side Effects
In serious cases, Chantix can cause skin effects such as rash or swollen, red, blistering or peeling skin. Chantix can also cause serious swelling of the face, tongue, lips, gums, arms, legs or throat. It can also cause blisters in the mouth. If you experience any of these symptoms, call your doctor or go to an emergency room immediately.
FDA Warning
The FDA warns that some people taking this medication have had behavior or mood changes, including hostility, aggression, depressed mood and suicidal thoughts. They note that the role of Chantix in this is unclear because it is hard to differentiate whether these issues are from taking Chantix or from nicotine withdrawl. If you have any suicidal thoughts or behavior changes, stop taking this medication and cal your doctor immediately. For the full warning, review the Chantix Medication Guide provided by the FDA (see Resources). If you are taking this medication, ask your doctor or pharmacist to provide you with the patient information packet about Chantix.
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