Bupropion
"I started smoking when I was 15 and quit when I was 25. I started again at age 42 and was unable to quit on my own. I used Chantix successfully for a year, but relapsed.  Subsequent quits would last a few weeks, then I would go back to a pack a day. I got a Rx for Wellbutrin.  It made me feel high at first but that has gone away.  No other side effects.  



With Wellbutrin SR, 150mg 2 X day, I was able to quit for 60 days.  After 60 days, I gradually worked up to a pack every 3 days.  That's right, a pack every 3 days.  Since I couldn't give it up completely, I am now on Chantix and Wellbutrin and have been smoke free for 3 weeks and 3 days without cheating.  Never stop trying to quit."