I will never take Zyban, a.k.a. Wellbutrin again. Yes it killed my appetite, but the sudden violent eruption of digustingly itchy hives that sent me to the emergency room at 1:30 AM on Christmas Day convinced me I didn't need to take it. Watch out for those side efects!! I was taking it not to stop smoking, but to help me sleep at night/depression. I would rather sleep badly than itch all the time lol!!