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Am Heart J. 2001 Sep;142(3):489-97.

Effects of sibutramine on body weight and serum lipids: a double-blind, randomized, placebo-controlled study in 322 overweight and obese patients with dyslipidemia.

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  • 1Kansas Foundation for Clinical Pharmacology, Radiant Research-Kansas City, Overland Park, Kan, USA.



Cardiovascular risk factors associated with obesity, including dyslipidemia, can be improved by weight loss. The main dyslipidemia associated with obesity is elevated serum triglyceride and decreased serum high-density lipoprotein cholesterol (HDL-C) levels.


A total of 322 obese patients (body mass index > or = 27) with serum triglyceride levels > or = 250 mg/dL and < or = 1000 mg/dL and serum HDL-C levels < or = 45 mg/dL (women) and < or = 40 mg/dL (men) were placed on a step I American Heart Association diet and subsequently randomized to sibutramine 20 mg (n = 162) or placebo (n = 160) once daily for 24 weeks.


Patients taking sibutramine had significantly greater mean weight loss than those receiving placebo (-4.9 kg vs -0.6 kg, P < or = .05). Forty-two percent of the sibutramine group lost > or = 5% of baseline weight and 12% lost > or = 10% compared with 8% and 3%, respectively, of the placebo group (P < or = .05). Mean decreases in serum triglyceride levels among 5% and 10% weight-loss responders in the sibutramine group were 33.4 mg/dL and 72.3 mg/dL, respectively, compared with an increase of 31.7 mg/dL among all patients receiving placebo (P < or = .05). Mean increases in serum HDL-C levels for 5% and 10% weight-loss responders in the sibutramine group were 4.9 mg/dL and 6.7 mg/dL, respectively, compared with an increase of 1.7 mg/dL among all patients in the placebo group (P < or = .05). Adverse events and discontinuation rates were similar in the sibutramine and placebo groups, although sibutramine-treated patients had mean increases in systolic and diastolic blood pressure of 2 to 3 mm Hg relative to placebo.


In overweight and obese patients with high serum triglyceride levels and low serum HDL-C levels, treatment with sibutramine was associated with significant improvements in body weight and in serum triglyceride and HDL-C levels.

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