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Efficacy and tolerability of extended-release niacin/laropiprant in dyslipidemic patients with metabolic syndrome.

Author(s): Bays HE, Shah A, Lin J, McCrary Sisk C, Paolini JF, Maccubbin D.

Affiliation(s): Louisville Metabolic and Atherosclerosis Research Center, Louisville, KY 40213, USA. hbaysmd@aol.com

Publication date & source: 2010, J Clin Lipidol. , 4(6):515-21

OBJECTIVE: Patients with metabolic syndrome (MetS) are at increased risk for cardiovascular disease. Niacin improves lipid abnormalities associated with MetS, but is underused, mainly because of flushing. Laropiprant (LRPT) reduces niacin-induced flushing and, in combination with extended-release niacin (ERN/LRPT), improves lipid levels. METHODS: In this post-hoc subgroup analysis of a phase 3 randomized, double-blind, placebo-controlled, 24-week study (n = 1613), we evaluated the efficacy and safety of ERN/LRPT in dyslipidemic patients with MetS. Dyslipidemic patients were randomized 3:2:1 to ERN/LRPT 1 g, ERN 1 g, or placebo. After 4 weeks, active treatment doses were doubled (2 tablets) for 20 weeks. RESULTS: Relative to placebo, ERN/LRPT significantly lowered low-density lipoprotein cholesterol and increased high-density lipoprotein cholesterol levels to a similar degree in MetS and non-MetS cohorts. ERN/LRPT significantly (P < .001) lowered triglyceride levels versus placebo in patients with MetS and without MetS (-30.2% vs -22.2%, respectively). The between subgroup difference in triglyceride lowering was not significant. For all lipid parameters, ERN/LRPT and ERN produced similar magnitude changes. ERN/LRPT and ERN produced similar increases in median fasting blood glucose levels versus placebo in patients with MetS (2.0 and 4.0 mg/dL, respectively) and without MetS (4.0 mg/dL for both groups), consistent with a known effect of niacin. CONCLUSION: In patients with MetS, ERN/LRPT improves multiple lipid parameters associated with increased cardiovascular disease risk. ERN/LRPT numerically improved triglyceride levels more in patients with versus without MetS, which is likely related to greater baseline triglycerides in MetS patients.

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