Varenicline
"51 years old. This last week marked my 1st year in 36 years as a smoke free year. Still taking Chantix. Scared to stop but no side effects. Ok I felt  nauseous for a min or 2 once or twice a week but I did used to stick an ash tray in my mouth so I will pay that price. Anyways if it works for you and you still think you need to take it that's ok.   This is what works for me. Just putting it out there."