Chantix
"I'm on day 7 of using Chantix.  I'm using it to quit a smokeless tobacco habit.  I was using about a tin a day and wanted to share my experience as reading through the reviews it seamed like they were all for smokers.
On day 2 Copenhagen started to taste nasty, and make me nauseous having one it.  I "powered through" this for 3 more days, as I wasn't quite ready to give up my buddy.  I'm now into day 2 without a "dip" and I really don't have the desire for one.  I still have triggers, but I can rationalize and overcome with logic that these are just cravings and ignore them.  
As far as side effects I do have some nausea  after taking the pill, but with food and a glass of water its not bad.  Like most very vivid dreams, but no nightmares."