Eligible patients were at least 18 years of age and had a confirmed diagnosis of ulcerative colitis. Patients had a Mayo Score of 4– 1 0 points (1 1) and mildly to moderately active disease on sigmoidoscopy (endoscopic subscore of at least 1) while receiving either oral mesalamine (or equivalent medications sulfasalazine, balsalazide, and olsalazine) for at least 4 weeks or no medical therapy.