Lovastatin is primarily used to lower high levels of cholesterol and low-density lipoprotein (LDL) in the blood. It helps reduce the risk of cardiovascular diseases such as heart attack and stroke by inhibiting an enzyme involved in cholesterol production in the liver. It is commonly prescribed to patients with hypercholesterolemia and those with a history of coronary heart disease. Lovastatin is also used in combination with lifestyle changes like diet and exercise to manage lipid levels effectively. Additionally, it may have beneficial effects in slowing the progression of atherosclerosis.