smoking cessation
"I took Chantix for three weeks.  I stopped smoking after week one. Then I continued to take the drug for two more weeks.  Then one day I forgot to take it and realized that I had no desire to take it.  That was the last day that I took it and I have not had a single craving for a cigarette or a single side effect, as far as I can tell.  It's been over a month now and it was the best $100 I ever spent.  Thank you Chantix."