I've been on Chantix twice, first time I was smoke free for 8 months and I relapsed. Now is my second time and I have to say that if it wasn't for this medication I would still be smoking. You have to follow the directions and give yourself at least 2 weeks to stop smoking, it took me 3 weeks. As far as the side effects, yes I had them, in fact I'm still having the dreams, no big deal, the nausia passed after about 1 week. I'll be 6 weeks clean on Thurs., it works, just give it a shot.