Cholesterol Lowering Level of MK0653A+Simvastatin in Patients With Hypercholesterolemia and Atherosclerotic or Coronary Vascular Disease (0653A-806)(COMPLETED)

A Multicenter Study to Assess the Cholesterol Lowering Level of Switching to an Investigational Drug Compared to Doubling the Dose of an Investigational Drug in Patients With Hypercholesterolemia and Atherosclerotic or Coronary Vascular Disease

A 6-week treatment study to compare the reduction in cholesterol of two drugs MK0653A+Simvastatin for high cholesterol, in patients with hypercholesterolemia and atherosclerotic or coronary vascular disease.

- Men and women greater than or equal to 18 years of age with elevated cholesterol levels and coronary heart disease (CHD), or atherosclerotic vascular disease may be eligible to participate in this study.