Has anyone else quit with Wellbutrin? Was it helpful? How long did it take to work? I'm on 150 mg once a day of Wellbutrin XL. My new family doctor just prescribed it to me for depression and to help me quit smoking again. She is also switchinf me from xanax to klonopin which I'm worried wont work as well. Been on .5 mg xanax most days for years, never increased my dose.