Thank you @sldrx, I very much appreciate your quick reply and most excellent suggestion. I did try Wellbutrin, twice, and you are right, both times it worked very well. For a few weeks. I had zero G/I issues, zero diarrhea and my mood lifted significantly. Unfortunately, no matter how much water I drank, for some odd reason buproprion dried me out so much that I had the opposite problem. Dry mouth and constipation. I developed blockages that required Miralax to move along, and some days not even Miralax worked. I ended up being x-rayed for an SBO both times, only for the x-ray to show that the blockage was not in what remains of my small bowel, it was in my pouch and no evidence of a stricture or adhesions causing the problem. The only change I had made was taking Wellbutrin, and the problem resolved when I stopped.
I really do appreciate your taking the time to reply. It's uplifting and comforting not to be alone with this stuff!