Atorvastatin Hemicalcium salt Sesquihydrate;阿托伐他汀钙;344423-98-9 FormulaC66H74CaF2N4O13 Atorvastatin is used primarily for lowering blood cholesterol and for prevention of events associated with cardiovascular disease. Like all statins, atorvastatin works by inhibiting HMG-CoA reductase, an enzyme found in liver tissue that plays a key role in production of cholesterol in the body.Atorvastatin is also used for the treatment of dyslipidemia.