Statin-induced myositis migrans.

Muscle related side effects of statins might be more frequent than once considered. Without affecting CK, they appear in various forms. Here, for the first time, we describe a new appearance we call "Statin-induced myositis migrans" in a 74-year-old female. Symptoms appeared more during the day and were not related to exercise. They were seen after simvastatin, pravastatin and--most intensively--after atorvastatin, but not on lovastatin, which the patient took for about 7 years without any problem. The clinical consequence (to withdraw the drug or not) of these milder statin side effects are discussed.