Is topical therapy necessary in acute distal colitis? Double‐blind comparison of high‐dose oral mesalazine versus steroid enemas in the treatment of active distal ulcerative colitis

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Abstract
Thirty-seven patients suffering an attack of acute distal ulcerative colitis of mild or moderate severity were randomized in a double-blind, double-dummy fashion to receive either 800 mg oral mesalazine four times daily (18 patients) or steroid enemas twice daily (19 patients) for 4 weeks. Both treatments were well tolerated with no adverse effects. Three patients in each group were withdrawn because of clinical deterioration but both treatments produced significant clinical improvement with decreases in stool frequency and scores for urgency, bleeding and tenesmus. There were no significant differences between the treatments although there was a slight trend in favour of the enemas for reduction in rectal bleeding. Activity of the colitis as graded at sigmoidoscopy also decreased significantly with both treatments and there were corresponding improvements in histological parameters of inflammatory activity assessed with the aid of a computerized morphometric system. Little correlation was seen between clinical, sigmoidoscopic and histological changes.