I think some of the pain I've been having is from Wellbutrin. It's not the whole story, but I've had gassy intestinal pain for several months. I've been taking Wellbutrin for about 1 year. I just tried stopping it for a few days and voila, the gassy crampy stuff is almost gone. Have other people had this? If that's the problem, I'm bummed because it has been a good anti-depressent. I think I may need to talk with the doc about doing some combination of meds.