Lovastatin is primarily used to lower cholesterol levels in the blood. It works by inhibiting an enzyme in the liver that is responsible for producing cholesterol. This helps reduce the risk of heart disease, stroke, and other cardiovascular conditions. It is often prescribed to patients with high levels of low-density lipoprotein (LDL) cholesterol, commonly referred to as "bad" cholesterol. Additionally, lovastatin may be used in combination with diet, exercise, and other lifestyle changes to improve overall lipid profiles. In some cases, it is also used to slow the progression of atherosclerosis, a condition where arteries become narrowed and hardened due to plaque buildup.