I took this for about 3 weeks on month ago after a flare-up. The side effects to me are apparent 3 days after I started taking them which are growing a lot of pimples on face, neck and chest, feeling itchness on the leg and back. The effectiveness of controling my UC symptom is not as obvious. I was diagnosed in October 2005 as UC. The flare-up happens every 2 months, now it's my 5th time. I am taking colozal, entocorte, Ferrex. My UC majorly locates at the end of my colon. I am kind of disappointed to the treatment that my doctor directed. I am going to try Sheldon's Vitamin E and diet. Hopefully that could really help. Will post my experience at Sheldon's topic.