Atorvastatin 40 Tablet belongs to a group of medicines called statins. It is used to lower cholesterol and to reduce the risk of heart diseases. Cholesterol is a fatty substance that builds up in your blood vessels and causes narrowing, which may lead to a heart attack or stroke .It works by blocking an enzyme (HMG-CoA-reductase) that is required in the body to make cholesterol. It thus lowers "bad" cholesterol (LDL) and triglycerides, raising the level of "good" cholesterol (HDL).. Atorvastatin 40mg Tablets belong to a class of medications known as HMG-CoA reductase inhibitors, commonly referred to as statins. They are prescription drugs used to lower cholesterol levels in the blood. Key functions: 1.Reduce "bad" cholesterol (LDL) levels. 2.May slightly increase "good" cholesterol (HDL) levels. 3.May help prevent plaque buildup in arteries (atherosclerosis). Possible uses: Lower the risk of heart attack, stroke, and other cardiovascular problems in people with high cholesterol or at high risk for these conditions. Important Information: 1.Atorvastatin 40mg tablets are available by prescription only. 2.It is crucial to follow your doctor's instructions regarding dosage and duration of use. 3.Atorvastatin can interact with other medications. Inform your doctor about all medications you are taking, including prescription and over-the-counter drugs, vitamins, and herbal supplements. 4.Atorvastatin can cause side effects. Common side effects include muscle pain, weakness, constipation, headache, upset stomach, and diarrhea. More serious side effects are possible but less common. It is important to discuss potential side effects with your doctor..