smoking cessation
"Here is what nicotine does to your brain...
Nicotine also can have effects on the parts of the brain that sense pleasure. When nicotine gets into the brain, it is able to stimulate the release of a neurotransmitter called dopamine. Dopamine activates some of the neurons in the part of the brain that register pleasure. As a result, nicotine triggers a chemical sensation of pleasure, which causes people to associate tobacco use with a feeling of pleasure.
Here is what Chantix does to it...
Chantix messes with the part of the brain that senses pleasure, looks forward to things, has hope for tomorrow.  It takes that all away. I took Chantix and the effects were catastrophic.  Needed three meds to counter it.  Stay away!"