Bupropion
"I was prescibed bupropion for depression and anxiety and I had no idea it could help with smoking cessation as well, but within a couple weeks I had noticed that my cravings had decreased and that I no longer enjoyed smoking my cigarettes.  They pretty much became a chore.  I went from smoking 8 a day to maybe 1 or 2 before I decided to quit, about three months after I started taking bupropion.  It's been over five weeks and I do crave them very seldomly but its not a nagging craving and it goes away pretty fast.  Sometimes I give into stealing a few drags from a friend when I'm out drinking but even when I'm drunk, it doesn't feel good.  I could never finish another cigarette!"