Intest Res  
Comparison of efficacy of once daily multimatrix mesalazine 2.4 g/day and 4.8 g/day with other 5-aminosalicylic acid preparation in active ulcerative colitis: a randomized, double-blind study
Haruhiko Ogata1, Tadashi Yokoyama, Seiichi Mizushima3, Atsushi Hagino3, Toshifumi Hibi4
1Center for Diagnostic and Therapeutic Endoscopy, Keio University Hospital, Tokyo, 2Yokoyama Hospital for Gastroenterological Diseases, Nagoya, 3Clinical Development Department, Mochida Pharmaceutical Co., Ltd., Tokyo, 4Center for Advanced IBD Research and Treatment, Kitasato Institute Hospital, Kitasato University, Tokyo, Japan
Correspondence to: Haruhiko Ogata, Center for Diagnostic and Therapeutic Endoscopy, Keio University Hospital, 35 Shinanomachi, Shinjuku-ku, Tokyo 160-8582, Japan. Tel: +81-3-3353-1211, Fax: +81-3-3353-3536, E-mail:
§Current affiliation: Yokoyama IBD Clinic, Nagoya, Japan
Received: June 30, 2017; Revised: November 20, 2017; Accepted: November 21, 2017; Published online: January 25, 2018.
© Korean Association for the Study of Intestinal Diseases. All rights reserved.

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Background/Aims: This study compared the efficacy of multimatrix mesalazine 2.4 g/day and 4.8 g/day with controlled-release mesalazine 2.25 g/day. Methods: In this multicenter, randomized, double-blind study, 251 patients with mildly to moderately active ulcerative colitis received multimatrix mesalazine 2.4 g/day once daily (Multimatrix-2.4), 4.8 g/day once daily (Multimatrix-4.8), or controlled-release (time-dependent) mesalazine 2.25 g/day 3 times daily (Time-2.25) for 8 weeks. The primary efficacy endpoint was the change in the ulcerative colitis-disease activity index (UC-DAI) score. Results: The mean change in the UC-DAI score and standard deviation in the per protocol set was −1.9±2.54 for Multimatrix-2.4 and −2.4±2.79 for Time-2.25. The difference between Multimatrix-2.4 and Time-2.25 was 0.3 (two-sided 95% confidence interval [CI], −0.5 to 1.1), thus non-inferiority was not demonstrated based on the pre-defined non-inferiority margin (1.0). In the full analysis set, the difference between Multimatrix-4.8 and Time-2.25 was −1.2 (two-sided 95% CI, −2.0 to −0.5), and the mean change in UC-DAI score in the FAS was −3.3 (two-sided 95% CI, −3.9 to −2.8) for Multimatrix-4.8 and −1.9 (two-sided 95% CI, −2.5 to −1.3) for Multimatrix-2.4, indicating that Multimatrix-4.8 was more effective than Time-2.25 and Multimatrix-2.4. There was no difference among the treatment groups in terms of safety. Conclusions: This study showed that the efficacy of multimatrix mesalazine 2.4 g/day was comparable to controlled release mesalazine 2.25 g/day, although non-inferiority was not demonstrated. Importantly, this was the first study to indicate that multimatrix mesalazine 4.8 g/day was more effective than 2.4g/day with no associated safety concerns.
Keywords: Colitis, ulcerative; Active; Mesalazine; Multimatrix

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