I have been taking Paxil 20 mg for panic disorder for approximately five years. It has worked very well. Additionally I take Wellbutrin for depression. Is the Paxil causing the 20-pound weight gain around my midsection? Is there something similar that I can take that may work as well, and not cause weight gain? I've also been less active due to a hip injury, but I feel that the Paxil has been a contributor. Yes?