I've heard there are some bad side effect like deep depression and you should talk to your Dr. I know, you can't run to your Dr for every little thing, but sounds like the Chantix can be dangerous for some people. I took it with no problems, but I am glad that you have stopped it. I took a prescribed sleeping med before chantix so I was OK with the sleep thing, but seems to affect everyone else. Don't take the Chantix, find another way to quit. Have you read the Alan Carr book?