which could get worse while taking chantix. don't take chantix if you've had a serious allergic or skin reactioto it. if you develop these, stop taking chantix and see your doctor right away as some can be life-threatening. if you have a history of heart orlood vessel problems, tell your doctor if you have new or worse symptoms. get medical help right away if you have symptoms of a heart attack. use caution when driving or operating machinery. common side effects include nausea, trouble sleeping and unusual dreams. my inspiration for quitting were my sons. they were my little cheering squad. [ laughs ] [ male announcer ] ask your doctor if chantix is right for you.