Simvastatin is the active ingredient in Zocor helps to lower high cholesterol and triglyceride levels. Generic Zocor is used in people who have coronary heart disease (CHD) or who are at high risk of CHD (for example, if they have diabetes, a history of stroke, or other blood vessel disease). Zocor Simvastatin may be used in these people, regardless of their cholesterol level to help prolong life by reducing the risk of a heart attack, reduce the risk of stroke, reduce the need for surgery to increase blood flow to the heart, reduce the need for hospitalisation due to angina.