Varenicline
"Today is day 3 on Chantix. I have smoked 1-2 packs per day for 18 years. I have only had 2 cigarettes today and my desire for them has already greatly diminished.  When I think I need one, I just keep thinking of all that I am without it and it helps me through.  My quit date is 8/21 and I really feel that I will have no problem being smoke-free by then.  I am experiencing a few side effects, constipation which I've cured by taking an herbal detox supplement, gas and bloating, some fuzzy feelings, and vivid dreams, which do not seem to bother me.  Today I'm taking over my "smoking porch", repainting it to make it smoke-free, so I do not associate my favorite place in my house with cigarettes. I am so ready to quit!"