depression
"Wellbutrin has helped me a great deal. In response to one person who said they are having trouble sleeping...after 10 years on this anti-depressant with doses going up and down by 100 mg a day.  Difficulty sleeping has always been a  sign of a dosage that was too high.  If I have trouble sleeping, and headaches that feel tight in the back of my head, and feel easily irritated, lowering my dose by 50mg usually fixes the situation within 3 weeks."