Lipitor is a cholesterol lowering medication that blocks the manufacture of cholesterol in the body. Lipitor decrease low-density lipoprotein (LDL) cholesterol and total cholesterol in the blood. Lowering your cholesterol can help avoid heart disease and hardening of the arteries, situation that can lead to heart attack, stroke, and vascular disease. Lipitor is use to treat high cholesterol. It is also used to lesser the risk of stroke, heart attack, or other heart difficulty in people with coronary heart disease or type 2 diabetes.