I just had my first colonoscopy after dealing with ibs for 4yrs! I had it yesterday and everything looked normal but they took a biopsy so im waiting for those results. I had gotten my hopes up that maybe they would find the problem and am pretty annoyed that things look normal. ANyways i was looking online and came across an artical for a drug called ketotifen the artical seems pretty new but i was wondering if anyone has tried it and if its helped??