Helpus,
I was on Welbutrin for a very short stint...I am now on Lithium and don't really know if it's any better at all. Each time it gets upped, I seem to have these (or similar) rollercoaster emotions...I haven't had the rage before - at least not in sobriety, but I will be talking to a Dr. about it soon...
Good luck to you going off the meds...
Peace.