ATOCOR 10mg tablets contain atorvastatin, a statin medication. It is used to lower levels of LDL cholesterol ("bad" cholesterol) and triglycerides in the blood while increasing HDL cholesterol ("good" cholesterol). Atorvastatin works by inhibiting the enzyme HMG-CoA reductase, which is responsible for cholesterol production in the liver. This helps reduce the risk of heart disease, stroke, and other cardiovascular problems.