Efficacy of benfluorex in combination with sulfonylurea in type 2 diabetic patients: an 18-week, randomized, double-blind study.

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Moulin P, Andre M, Alawi H, dos Santos LC, Khalid AK, Koev D, Moore R, Serban V, Picandet B, Francillard M

Efficacy of benfluorex in combination with sulfonylurea in type 2 diabetic patients: an 18-week, randomized, double-blind study.

Diabetes Care. 2006 Mar;29(3):515-20.

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16505498 [ View in PubMed
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Abstract

OBJECTIVE: The aim of this study was to demonstrate the superiority of benfluorex over placebo as an add-on therapy in type 2 diabetic patients in whom diabetes is insufficiently controlled by sulfonylurea monotherapy and who have a limitation for the use of metformin. RESEARCH DESIGN AND METHODS: Type 2 diabetic patients with HbA(1c) (A1C) (7-10%) who were receiving the maximum tolerated sulfonylurea dose and had a contraindication to or poor tolerance of metformin were randomly assigned (double blind) to receive benfluorex 450 mg/day (n = 165) or placebo (n = 160) for 18 weeks. The main efficacy criterion was A1C, analyzed as the change from baseline to the end of treatment using ANCOVA with baseline and country as covariates. Secondary criteria were fasting plasma glucose (FPG), insulin resistance, and plasma lipid level. RESULTS: Both groups were similar at baseline in the intention-to-treat population. A1C significantly decreased with benfluorex from 8.34 +/- 0.83 to 7.52 +/- 1.04% (P < 0.001) and tended to increase with placebo from 8.33 +/- 0.87 to 8.52 +/- 1.36% (NS), resulting in a mean adjusted difference between groups of -1.01% (95% CI -1.26 to -0.76; P < 0.001). The target A1C (< or =7%) was achieved in 34% of patients receiving benfluorex versus 12% of patients receiving placebo. Significant between-group differences in favor of benfluorex were observed for mean FPG (-1.65 mmol/l) (P < 0.001) and for homeostasis model assessment of insulin resistance. Overall tolerance was similar in both groups. Serious adverse events were more frequent in the benfluorex group, without evidence of causality relationship. CONCLUSIONS: Benfluorex as an add-on therapy was superior to placebo in lowering A1C with a between-group difference of 1% in type 2 diabetic patients whose disease was insufficiently controlled with sulfonylurea alone and in whom metformin was contraindicated or not tolerated.

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