http://www.nlm.nih.gov/medlineplus/druginfo/medmaster/a695033.html
National Library of Medicine, National Institutes of Health
Bupropion (byoo-PROE-pee-on) is used to relieve mental depression and is used as part of a support program to help you stop smoking. Bupropion is sold under different brand names for different uses. If you are already taking medicine for mental depression or to help you stop smoking, discuss this with your health care professional before taking bupropion. It is very important that you receive only one prescription for bupropion at a time . Some commonly used brand names are Wellbutrin, Wellbutrin SR, Zyban (in the US). In Canada - Wellbutrin SR and Zyban. Another commonly used name is amfebutamone.