Despite undeniable progress in the reduction of morbidity and mortality of coronary heart disease (CHD) prevention is a mainstay for medical intervention. The importance of elevated serum cholesterol for the formation and progress of CHD can be regarded as proved after the results of the major intervention studies became available. These studies have provided key evidence for a positive correlation of lipid lowering and decreased mortality. Other studies in patients with established CHD have shown that stabilization and regression of atherosclerotic lesions is possible with lowering of cholesterol using a variety of agents. Different studies have also investigated the long-term effects of lipid lowering strategies on atherosclerosis by means of coronary angiography and have demonstrated that lipid reduction reduces progression of atherosclerosis and can promote atherosclerosis regression. Thus, it has been demonstrated that cholesterol lowering therapy reduces the risk of CHD and diminishes cardiovascular morbidity and mortality.