Gordon R. Greenberg, Brian G. Feagan, Francois Martin, Lloyd R. Sutherland, Alan Thomson, C. Noel Williams, Lars-Goran Nilsson, Tore Persson, for The Canadian Inflammatory Bowel Disease Study Group
Background Corticosteroids are the most efficacious drugs forinducing remission in active Crohn's disease, but their benefitsare frequently offset by serious side effects. Budesonide isa corticosteroid with high topical antiinflammatory activitybut low systemic activity because of extensive hepatic metabolism.We investigated the efficacy and safety of an oral controlled-ileal-releasepreparation of budesonide in patients with active Crohn's diseaseinvolving the ileum or ileum and proximal colon.
Methods In a double-blind, multicenter trial, 258 patients wererandomly assigned to receive placebo or one of three doses ofbudesonide -- 3, 9, or 15 mg daily. The primary outcome measurewas clinical remission, as defined by a score of 150 or lesson the Crohn's disease activity index.
Results After eight weeks of treatment, remission occurred in51 percent of the patients in the group receiving 9 mg of budesonide(95 percent confidence interval, 39 to 63 percent), 43 percentof those receiving 15 mg (95 percent confidence interval, 31to 55 percent), and 33 percent of those receiving 3 mg (95 percentconfidence interval, 21 to 44 percent), as compared with 20percent of those receiving placebo (P<0.001, P = 0.009, andP = 0.13, respectively). Improvements in the quality of life,as measured by the patients' responses to the inflammatory boweldisease questionnaire, parallelled these remission rates. Locationof disease, prior surgical resection, and previous use of corticosteroidsdid not affect the outcome. A total of 119 patients (46 percent)were withdrawn from the study before the trial ended, 96 becauseof insufficient therapeutic effects, 13 because of adverse reactions,and 10 because of noncompliance. Budesonide caused a dose-relatedreduction in basal and corticotropin-stimulated plasma cortisolconcentrations but was not associated with clinically importantcorticosteroid-related symptoms or other toxic effects.
Conclusions In an eight-week trial, an oral controlled-releasepreparation of budesonide at an optimal daily dose of 9 mg waswell tolerated and effective against active Crohn's diseaseof the ileum and proximal colon.
Source Information
From the Department of Medicine, University of Toronto, Toronto (G.R.G.); the Departments of Medicine and Epidemiology and Biostatistics, University of Western Ontario, London (B.G.F.); the Department of Medicine, University of Montreal, Montreal (F.M.); the Department of Medicine, University of Calgary, Calgary, Alta. (L.R.S.); the Department of Medicine, University of Alberta, Edmonton (A.B.R.T.); the Department of Medicine, Dalhousie University, Halifax, N.S. (C.N.W.); and the Departments of Clinical Research and Development and Biostatistics and Data Processing, Astra Draco, Lund, Sweden (L.-G.N., T.P.). Members of the study group are listed in the Appendix.
Address reprint requests to Dr. Greenberg at Mount Sinai Hospital, 600 University Ave., Rm. 445, Toronto, ON M5G 1X5, Canada.
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