Rosuvastatin belongs to a group of medicines known as statins or HMG CoA reductase inhibitors. It helps in reducing levels of "bad" cholesterol (LDL) as well as triglycerides in the blood. It also helps in increasing levels of "good" cholesterol (HDL).It does this by blocking the action of a certain enzyme knownas HMG-CoA reductase, which is needed by your body to make the fats. It is also used to lower the risk of a heart attack and stroke as well as other heart complications in certain people with coronary heart disease, diabetes, or other risk factors. Rosuvastatin is also used in children who are at least 10 years of age.