Chantix
"Smoker of 35 years.  2 packs a day the past 2 years.  This product definitely curbed the urge enough to help get me off of them.  Did experience nausea and diarrhea the first 2 days.  Then trouble sleeping.  LOTS of trouble sleeping, still on the pill (1 month now) and averaging 3-3.5 hours a day at most, but WORTH losing the habit.  Rated this drug a 9 only because of the sleeping side effect.  It WORKS."