I had a co-worker that used chantix, quit smoking for about 2-3 months, hit a rough patch in his life, and was back on stinkies again. He's now going
through a second try of it, and the worst he said he's had was really vivid dreams.
That said, I don't think I would feel comfortable taking something where a whole saddlebag full of psychiatric problems are pretty high up on the list of side effects.
-X