Atorvastatin-induced Myositis and Drug-induced Liver Injury

Statins are drugs for preventing cardiac events in the elderly population. Statins are well tolerated with a lower reported incidence of serious side effects (<0.15%) like myopathy and elevated transaminases [>3× upper limit of normal (ULN)]. Serious adverse effects of statins like statin-associated myopathy range from mild muscle pain to rhabdomyolysis. Drug-induced liver injury (DILI) is another adverse effect of statin use, typically presenting with an acute hepatocellular liver injury pattern as mixed or cholestatic injury. Symptoms usually disappear after 3 months of discontinuation of statins. Some patients require immunosuppression with steroids, intravenous immunoglobulin, or rituximab for management of rhabdomyolysis. DILI can be rapidly reversed by the stoppage of the statins if the enzyme elevation is more than twice the normal. Elderly patients are particularly at increased risk of such adverse effects, emphasizing a need for rational prescription of statins in older adults and close monitoring. We report a case of an elderly presenting with paraparesis and later diagnosed to be a case of statin-induced myositis that significantly improved with prompt management. How to cite this article: Kashyap K, Bisht K, Dhar M, et al. Atorvastatin-induced Myositis and Drug-induced Liver Injury. J Assoc Physicians India 2023;71(10):96-98.