The principle of Simvastatin in lowering blood lipids is to inhibit the enzyme of cholesterol synthesizing enzyme, so that the synthesis of cholesterol in the body will be reduced. Simvastatin has an inhibitory effect on cholesterol synthesizing enzyme, which can make the rate of cholesterol synthesis in the body decrease, and eventually reduce the level of cholesterol in the blood. The main indication of simvastatin is hypercholesterolemia, it also has a certain lowering effect on triglycerides, and can also be used in the treatment of mixed hypercholesterolemia. Simvastatin belongs to the western prescription drugs, the adverse effects of the drug are dizziness, nausea, diarrhea, rash, muscle aches, joint pain, etc. Allergy to the drug components, unexplained elevation of liver enzymes, severe hepatic impairment, lactation and pregnancy women are prohibited. Clinical oral simvastatin to lower blood lipids, should be used under the guidance of a physician.