• Am. J. Gastroenterol. · Jun 2002

    Randomized Controlled Trial Multicenter Study Comparative Study Clinical Trial

    A randomized, double blind, dose-response comparison of balsalazide (6.75 g), balsalazide (2.25 g), and mesalamine (2.4 g) in the treatment of active, mild-to-moderate ulcerative colitis.

    • Douglas S Levine, Dennis S Riff, Ronald Pruitt, Lawrence Wruble, George Koval, David Sales, John K Bell, and Lorin K Johnson.
    • Division of Gastroenterology, University of Washington School of Medicine, Seattle, USA.
    • Am. J. Gastroenterol. 2002 Jun 1; 97 (6): 1398-407.

    ObjectiveBalsalazide is a new innovative, mesalamine-containing prodrug that is activated by bacteria in the colon. Balsalazide has been shown previously to be well tolerated and effective in the treatment of acute ulcerative colitis. The aim of this study was to determine the dose-response of balsalazide for efficacy and safety in active, mild-to-moderate ulcerative colitis and to compare this profile with that of mesalamine, pH-dependent, delayed-release tablets.MethodsA multicenter, randomized, active control, double-blind, double-dummy, dose-response, parallel-group study was performed comparing balsalazide (6.75 g daily), balsalazide (2.25 g daily), and mesalamine (2.4 g daily), administered for 8 wk to 154 patients with active, mild-to-moderate ulcerative colitis as verified by sigmoidoscopy.ResultsEight weeks of treatment with 6.75 g of balsalazide daily provided significantly greater improvement than did balsalazide (2.25 g daily) in rectal bleeding (64.7% [6.75-g balsalazide] vs 32.4% [2.25-g balsalazide], p < 0.006), stool frequency (58.8% vs 29.4%, p < 0.006), sigmoidoscopic score (78.9% vs 52.5%, p < 0.015), and Physician's Global Assessment (73.7% vs 51.3%, p < 0.03). The efficacy of balsalazide showed a significantly more rapid onset of action than that of mesalamine (2.4 g daily) (2-wk sigmoidocopic score improvement, 54.7% [6.75-g balsalazide] vs 29.4% [2.4-g mesalamine], p = 0.006) with numerically greater improvement at 8 wk in five of seven measured signs and symptoms. Balsalazide (6.75 g daily) was well tolerated, and the safety profile did not differ significantly from that of balsalazide (2.25 g daily) or mesalamine.ConclusionsEight weeks of treatment with balsalazide (6.75 g daily) is significantly more effective than balsalazide (2.25 g daily) and more rapid in onset than mesalamine (2.4 g daily) in improving signs and symptoms of acute ulcerative colitis. Balsalazide (6.75 g daily) is well tolerated, and the safety profile does not differ from that of balsalazide (2.25 g daily) and mesalamine (2.4 g daily).

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