Creatine phosphokinase (CPK) is an enzyme in the body. It is found mainly in the heart, brain, and skeletal muscle. This article discusses the test to measure the amount of CPK in the blood.
Certain drugs such as cholesterol lowering drugs (statins) can damage muscle and elevate CPK. Other causes are alcohol, viruses, hereditary conditions. Finally CPKcan be elevated in certain autoimmune diseases that cause inflammation in the muscle such as polymyositis or dermatomyositis