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  • Title: Colesevelam hydrochloride therapy in patients with type 2 diabetes mellitus treated with metformin: glucose and lipid effects.
    Author: Bays HE, Goldberg RB, Truitt KE, Jones MR.
    Journal: Arch Intern Med; 2008 Oct 13; 168(18):1975-83. PubMed ID: 18852398.
    Abstract:
    BACKGROUND: Bile acid sequestrants are a well-accepted class of cholesterol-lowering drugs. Over the last decade, small studies have indicated that these agents may also lower glucose levels in patients with type 2 diabetes mellitus (T2DM). METHODS: This 26-week, randomized, double-blind, placebo-controlled, parallel-group study was conducted between August 2004 and July 2006 at 54 sites in the United States and 2 in Mexico to determine the effects of colesevelam hydrochloride, a bile acid sequestrant, in patients with inadequately controlled T2DM (hemoglobin A(1c) [HbA(1c)] level, 7.5%-9.5% [baseline HbA(1c) level, 8.1%]), who were receiving metformin monotherapy or metformin combined with additional oral anti-diabetes mellitus drugs. In total, 316 subjects were randomized (159 to colesevelam hydrochloride, 3.75 g/d, and 157 to matching placebo). The primary efficacy parameter was mean placebo-corrected change in HbA(1c) level from baseline to week 26 (analysis was on an intent-to-treat population using a last-observation-carried-forward approach). RESULTS: Colesevelam lowered the mean HbA(1c) level compared with placebo at week 26 (-0.54%; P < .001). Similar results were observed in the metformin monotherapy (-0.47%; P = .002) and combination therapy cohorts (-0.62%; P < .001). In addition, colesevelam significantly (1) lowered fasting plasma glucose (-13.9 mg/dL P = .01), fructosamine (-23.2 micromol/L; P < .001), total cholesterol (TC) (-7.2%; P < .001), low-density lipoprotein cholesterol (LDL-C) (-15.9%; P < .001), apolipoprotein B (-7.9%; P < .001), non-high-density lipoprotein cholesterol (HDL-C) (-10.3%; P < .001), and high-sensitivity C-reactive protein (-14.4%; P = .02) levels and (2) improved other measures of glycemic response, as well as TC/HDL-C, LDL-C/HDL-C, non-HDL-C/HDL-C, and apolipoprotein B/apolipoprotein A-I ratios (P < .003 for all). Triglyceride, HDL-C, and apolipoprotein A-I levels were not statistically significantly increased. CONCLUSION: Colesevelam improves glycemic and lipid parameters in patients with T2DM inadequately controlled with metformin-based therapy.
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