Aims: To evaluate the efficacy of switching from a previous statin monotherapy to ezetimibe/simvastatin (EZE/SIMVA) 10/20 mg vs. rosuvastatin (ROSUVA) 10 mg.
Methods: In this randomised, double-blind study, 618 patients with documented hypercholesterolaemia [low-density lipoprotein cholesterol (LDL-C) > or = 2.59 and < or = 4.92 mmol/l] and with high cardiovascular risk who were taking a stable daily dose of one of several statin medications for > or = 6 weeks prior to the study randomisation visit entered a 6-week open-label stabilisation/screening period during which they continued to receive their prestudy statin dose. Following stratification by study site and statin dose/potency, patients were randomised to EZE/SIMVA 10/20 mg (n = 314) or ROSUVA 10 mg (n = 304) for 6 weeks.
Results: EZE/SIMVA produced greater reductions in LDL-C (-27.7% vs. -16.9%; p < or = 0.001), total cholesterol (-17.5% vs. -10.3%; p < or = 0.001), non-high-density lipoprotein cholesterol (HDL-C) (-23.4% vs. -14.0%; p < or = 0.001) and apolipoprotein B (-17.9% vs. -9.8%; p < or = 0.001) compared with ROSUVA, while both treatments were equally effective at increasing HDL-C (2.1% vs. 3.0%; p = 0.433). More patients achieved LDL-C levels < 2.59 mmol/l (73% vs. 56%), < 2.00 mmol/l (38% vs. 19%) and < 1.81 mmol/l (25% vs. 11%) with EZE/SIMVA than ROSUVA (p < or = 0.001). A borderline significantly greater reduction in triglycerides (p = 0.056) was observed for EZE/SIMVA (-11.0%) vs. ROSUVA (-5.3%). There were no between-group differences in the incidences of adverse events or liver transaminase and creatine kinase elevations.
Conclusion: EZE/SIMVA 10/20 mg produced greater improvements in LDL-C, total cholesterol, non-HDL-C and apoB with a similar safety profile as for ROSUVA 10 mg.