Varenicline
"I just reached day 28. I have insomnia and the occasional stomach ache.  I do have the occasional "vivid dream" but not too much out of the ordinary. I was a pack  a day smoker for about 10 years. Since the end of week one I have had maybe 4 cigarettes. By day seven I was down to 4 a day. This worked great for me and I plan on taking it till month three then I'm going to go it on my own."