Zocor is a prescription drug that treats high cholesterol and triglyceride levels in the blood. It lowers the risk of heart attack, stroke, and blood vessel problems in people with certain risk factors. It is in the category of medicine called a statin, or a HMG-CoA reductase inhibitor. It reduces the amount of cholesterol in the blood by blocking an enzyme that is needed to make cholesterol.


Side effects of Zocor may include an allergic reaction, muscle pain, dark-colored urine, nausea, unusual tiredness or yellowing of the skin or whites of the eyes. The most common side effects is myopathy, or muscle injury. There is also a risk of rhabdomyolysis resulting in kidney failure or death if the drug is used with amiodarone. When taking Zocor grapefruit or grapefruit containing products should be avoided.


The use of Zocor has led to lawsuits due to problems from patients prescribed the 80mg pill, as they have an increased risk of developing rhabdomyolysis. In a clinical trial where 41,050 patients were treated with Zocor, more patients that received 80mg of Zocor developed myopathy than those that received 20 mg. This has led to serious side effects weakening of the muscles to such as extent that daily tasks become very difficult to perform.