Chantix
"This is my second go around with Chantix -- the last time being 7 or so years ago.  I'm on my second day with no smoking, (9th day on drug) and I feel like I have more energy, and generally feel like some cloud (no pun) has been lifted -- I haven't felt like this since I was 14 (started smoking a pack a day at 15).  I've been a smoker for 30 years.  I fear I'm on some kind of "pink cloud" that addicts often refer to.  I've had some strange dreams, and had trouble falling asleep last night -- but aside from that, no other side effects.  I'm hoping the dreams don't turn into nightmares, as they were so terrible 7 years ago when I first tried Chantix, that I had to stop."