Here's my personal experience taking Chantix in case anyone is considering using it to quit smoking. I'd tried several times to quit in the past few years. After a few days, the crushing depression would drive me back to them. (Nicotine would seem to be an anti-depressant) I started taking Chantix during the last week in June. You take it for a week, gradually building up the levels in your body, then you quit smoking. I quit on June 29. By June 30 I was on this forum and posting my suicidal thoughts. I blamed the Chantix, but now I wonder if it wasn't the nicotine withdrawal. And maybe it was joining this forum, but by July 1 or 2 I was feeling much better. I'm in my 3rd week of Chantix, and it's starting to feel very much like I'm on a regular anti-depressant. I was told that it was not the same sort of medication at all, although I got the same warnings about an increase in suicidal thoughts that I got with other anti-depressants. I'm very "up" emotionally, but it doesn't feel quite real as the problems I had that made me suicidal are still there. I'll let everyone know how it's going when I have something new to report. I'm most interested in what will happen in two weeks, when I try to stop taking the Chantix. In the past, stopping anti-depressants caused me to have anxiety attacks. We'll see.