Budesonide vs. Mesalazine vs. Budesonide/Mesalazine Suppository Combination Therapy in Acute Ulcerative Proctitis

Inclusion Criteria: * Active ulcerative proctitis * Diagnosis confirmed by endoscopy * Established disease or new diagnosis Exclusion Criteria: * Crohn's disease, indeterminate colitis, ischemic colitis, radiation colitis, diverticular assoc. colitis, microscopic colitis * Presence of proctitis of a different origin * Prior bowel resection * Presence of symptomatic organic disease of the gastrointestinal tract * Asthma, tuberculosis, cardiovascular disease, diabetes mellitus, osteoporosis, active peptic ulcer disease, glaucoma, cataract, infection if careful medical monitoring is not ensured * Local intestinal infection * Abnormal hepatic or renal function * Oral/rectal/intravenous corticosteroids therapy * Existing or intended pregnancy or breast-feeding * Participation in another clinical trial within the last 30 days, simultaneous participation in another clinical trial, or previous participation in this trial