Clinical efficacy of orlistat therapy in overweight and obese patients with insulin-treated type 2 diabetes: A 1-year randomized controlled trial.
OBJECTIVE; Weight loss improves glycemic control, lipid profiles, and blood pressure in patients with type 2 diabetes. However, successful long-term weight loss is difficult for these patients, particularly those treated with insulin. The aim of this study was to assess the effect of orlistat, a gastrointestinal lipase inhibitor, on weight loss, glycemic control, and cardiovascular risk factors in overweight or obese insulin-treated type 2 diabetic patients. RESEARCH DESIGN AND METHODS: This study was a 1-year multicenter, randomized, double-blind, placebo-controlled trial of orlistat (120 mg three times a day) or placebo combined with a reduced-calorie diet in overweight or obese adults (BMI 28-40 kg/m(2)) with type 2 diabetes treated with insulin alone or combined with oral agents, but with suboptimal metabolic control (HbA(1c) 7.5-12.0%). Outcome measurements included changes in body weight, glycemic control, blood pressure, and serum lipids. RESULTS; After 1 year, the orlistat group lost significantly more weight (-3.89 +/- 0.3% of baseline body weight, means +/- SE) than the placebo group (-1.27 +/- 0.3%, P < 0.001). Orlistat treatment, compared with placebo, produced greater decreases in HbA(1c) (-0.62 +/- 0.08 vs. -0.27 +/- 0.08%, P = 0.002), fasting serum glucose (-1.63 +/- 0.3 vs. -1.08 +/- 0.3 mmol/l, P = 0.02), and the required doses of insulin and other diabetic medications. Orlistat also produced greater improvements than placebo in serum total cholesterol (P = 0.0002) and LDL cholesterol concentrations (P = 0.001) and LDL/ HDL ratio (P = 0.01). CONCLUSIONS; Orlistat therapy produces clinically significant weight loss, with improvements in glycemic control and cardiovascular disease risk factors, in overweight or obese patients with type 2 diabetes who have suboptimal metabolic control with insulin therapy.[1]References
- Clinical efficacy of orlistat therapy in overweight and obese patients with insulin-treated type 2 diabetes: A 1-year randomized controlled trial. Kelley, D.E., Bray, G.A., Pi-Sunyer, F.X., Klein, S., Hill, J., Miles, J., Hollander, P. Diabetes Care (2002) [Pubmed]
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