Do not drink large amounts alcohol while taking  varenicline. Varenicline can increase the effects of alcohol or change the way you react to it. Some people taking varenicline have had unusual or aggressive behavior or forgetfulness while drinking alcohol.
Do not use other medicines to quit smoking, unless your doctor tells you to. Using varenicline while wearing a nicotine patch can cause unpleasant side effects.
Avoid driving or hazardous activity until you know how this medicine will affect you. Your reactions could be impaired.
