Varenicline
smoking cessation
"After 40 years of smoking - the last 10 at 3 packs a day - I finally tried Champix. After patches, gum, spray, lozenges all didn't work, I experienced very strong withdrawal symptoms with all three. I got a Rx and began taking them. After about 3 - 4 days I started to feel quite sick to my stomach. I read the info about side effects and there it was: nausea is the first and most common side effect. My doc recommended an anti nausea pill commonly called Gravol and after taking both, the nausea disappeared. 
What's very important to know about Champix is that it removes the withdrawal symptoms. Completely!
Try it, it sure worked for me and I hope it works for you.
Cheers and good luck!"