Caution! I did successfully stop smoking using Chantix four years ago. BUT: And that's a BIG BUT: Chantix acts on dopamine in the brain. Most people do very well with it. Dopamine is the neurotransmitter that receives the nicotine buzz. But, people who are taking medications for depression or bipolar illness must be very careful. It made me slightly manic, which turned out great because I wallpapered my mother's entire bathroom in three days!!! It did not unleash a full manic episode and I have known others who are not on psychoactive medications who said it made them feel funny so they didn't continue it. But, even with paying for it out of pocket (if you have no insurance) it is cheaper than cigarettes. You start taking it one week before quitting cigs and by that time, your craving for nicotine has started to decline already. I am giving you an A+ for effort right now for wanting to quit even if you smoke one less cigarette each day than you really want, you are a winner. Tomorrow make it two less. Keep at it, kid.