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Statins, which are used as first-line drugs in the prevention of cardiovascular disease, are usually safe, but in some cases there may be muscular toxicity. Statin-associated myopathy, can present as myalgia, myositis or rhabdomyolysis. Only 0.44 per 10,000 treated and per year, develop rhabdomyolysis. There are many risk factors associated with the patient and with the pharmacological treatment. A risk of muscle injury of 1-5% has been reported with some statins combined with fibrates. The fibrate with the highest risk of myopathy in combination with statins is gemfibrozil, while phenofibrate seems to be the safest. The case is presented of a 60 year-old woman with clinical symptoms and laboratory findings that suggested rhabdomyolysis secondary to a combination of simvastatin and phenofibrate. This case reminds physicians of the need to closely monitor these patients, in addition to alert them to the onset of muscle pain or weakness., (Copyright © 2013 Sociedad Española de Médicos de Atención Primaria (SEMERGEN). Publicado por Elsevier España. All rights reserved.)