Gosh, with both UC and diverticulitis I think I would skip all treatment and go straight to surgery!! Well, not really. But it is NOT common to have both diseases. I think you are maybe the second person I have heard of this happening too, but that's just based on internet discussion sites. Hopefully you can keep both conditions in remission.
dx proctitis in 1987
dx UC in 1991, was stable until 1998
1998 started prednisone, asacol, pentasa, nortriptylene, ativan, 6MP, rowasa enemas and suppositories, hydrocortisone enemas, tried the SCD diet, being a vegetarian, omega 3s, flax, pranic healing, yoga, acupuncture, probiotics
2000 lost all my B-12 stores and became anemic
2001 opted for j-pouch surgery- now living life med-free