Statins (HMG-CoA reductase inhibitors) are used widely for the treatment of
hypercholesterolemia. They inhibit HMG-CoA reductase competitively, reduce
LDL levels more than other cholesterol-lowering drugs, and lower triglycer
ide levels in hypertriglyceridemic patients. Statins are well tolerated and
have an excellent safety record. Clinical trials in patients with and with
out coronary heart disease and with and without high cholesterol have demon
strated consistently that statins reduce the-relative risk of major coronar
y events by approximate to 30% and produce a greater absolute benefit in pa
tients with higher baseline risk. Proposed mechanisms include favorable eff
ects on plasma lipoproteins, endothelial function, plaque architecture and
stability, thrombosis, and inflammation. Mechanisms independent of LDL lowe
ring may play an important role in the clinical benefits conferred by these
drugs and may ultimately broaden their indication from lipid-lowering to a
ntiatherogenic agents.