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Background: Multi-matrix (MMx), a new delivery system for mesalazine. seems to release 5-aminosalicyclic acid (5-ASA) preferentially in the sigmoid colon. This Study had 2 objectives: (1) to evaluate the therapeutic response to MMx in patients with active left-sided disease and (2) to gain additional insights as to how the therapy would compare with topical 5-ASA. Methods: Patients received either 1.2 g of 5-ASA MMx three times per day plus placebo enema or 4, of 5-ASA enema Plus placebo tablets for 8 weeks. The primary endpoint was clinical remission (clinical activity index ≤ 4) at 8 weeks. Secondary endpoints were endoscopic and histologic remissions. Results: Seventy-nine patients were enrolled. Clinical remission rates at 4 and 8 weeks were 57.5% and 60.0% for patients treated with MMx and 68.4% and 50.0% for patients randomized to 5-ASA enemas, respectively (95% confidence interval for the difference at 8 weeks, - 12 to + 32). Endoscopic remission was achieved by 45.0% of patients on 5-ASA MMx and by 36.8% of those on enema, whereas 15.0% and 8% of patients, respectively, showed histologic remission. Compliance was 97.0% for oral and 87.5% for topical therapy. In the enema group, compliance was 88.0% for the patients in remission and 65.5% for those with active disease. Conclusions: Preliminary studies suggest that similar rates for induction of remission can be expected from 5-ASA enemas and MMx for patients with left-sided Ulcerative colitis.

Prantera C., V.A. (2005). A new oral delivery system for 5-ASA: Preliminary clinical findings for MMx. INFLAMMATORY BOWEL DISEASES, 11(5), 421-427 [10.1097/01.MIB.0000158386.25660.1e].

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