Lipid altering-efficacy of ezetimibe co-administered with simvastatin compared with rosuvastatin: a meta-analysis of pooled data from 14 clinical trials

Alberico Catapano, William E Brady, Thomas R King, Joanne Palmisano
Current Medical Research and Opinion 2005, 21 (7): 1123-30

OBJECTIVE: Results of direct comparative studies between ezetimibe/simvastatin and rosuvastatin therapies have not been reported. Both of these treatment options offer significant reductions in LDL-C. To evaluate the lipid efficacy of each of these therapies relative to each other, a meta-analysis of data from 14 randomized, double-blind clinical trials that compared the effectiveness of two new options for cholesterol lowering was performed.

DATA SOURCES: PubMed, EMBASE and BIOSIS databases were searched up to March 14, 2004.

METHODS OF STUDY SELECTION: Efficacy results from clinical trials with the co-administration of ezetimibe 10 mg with simvastatin or with the ezetimibe/simvastatin combination product (ezetimibe/simvastatin 10/10 mg, 10/20 mg, 10/40 mg, and 10/80 mg) were compared with efficacy results from clinical trials of rosuvastatin 5 mg, 10 mg, 20 mg, and 40 mg in patients with primary hypercholesterolemia. Trials in healthy patients, heterozygous familial hypercholesterolemia or combined hyperlipidemia, and pharmacokinetic trials were excluded.

DATA EXTRACTION AND SYNTHESIS: This analysis used pooled data for LDL-C, HDL-C, non-HDL-C, triglycerides, total cholesterol, apolipoprotein (apo) A-I, and apo B for the two therapies at their lowest doses (ezetimibe/simvastatin 10/10 mg and rosuvastatin 5 mg) through their highest doses (ezetimibe/simvastatin 10/80 mg and rosuvastatin 40 mg), and estimated within-treatment percentage changes in these parameters. Percentage reductions from baseline in LDL-C for the pooled data were 46.2% and 41.8% for ezetimibe/simvastatin 10/10 mg and rosuvastatin 5 mg, respectively; 50.6% and 47.4% for ezetimibe/simvastatin 10/20 mg and rosuvastatin 10 mg, respectively; 55.9% and 52.1% for ezetimibe/simvastatin 10/40 mg and rosuvastatin 20 mg, respectively; and 59.7% and 58.5% for ezetimibe/simvastatin 10/80 mg and rosuvastatin 40 mg, respectively.

CONCLUSIONS: The results of this meta-analysis suggest greater LDL-C lowering with ezetimibe/simvastatin compared with rosuvastatin. These results need to be confirmed in a head-to-head comparison of both therapies.

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