According to my GI it's very common to have both conditions. I had both. I could never really determine the difference between the two, was my UC more bothersome than the IBS?, but I think in retrospect that the discomfort I felt when I was in remssion was the IBS and the last flare I had before surgery was defintely the UC.
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