Simvastatin is used to decrease cholesterol and triglycerides in the blood. The drug is also used to curtail the risk of stroke, heart attack and other heart problems in those with diabetes or other risk factors. According to Drugs.com, Simvastatin is in a group of drugs referred to as statins.
Drugs.com notes that Simvastatin is intended to be used by adults and children who are at least 10. Common side effects from taking this medication include constipation, nausea, stomach pain, headache, stuffy nose, sneezing or sore throat. Grapefruit products should not be consumed while taking Simvastatin, as the interaction may result in dangerous effects. Simvastatin should not be taken during pregnancy, as it can cause harm to an unborn baby or birth defects.