toxic myopathy; drug-induced myopathy
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Etiology
- statins, see statin myopathy
- ethanol
- interferons
- antiretroviral agents
- antimalarials[1]
- cocaine (can occur after single use)[1]
- colchicine (usually after months-years)[1]
- glucocorticoids (long-term use)[1]
Clinical manifestations
- muscle tenderness
Differential diagnosis
- muscle tenderness distinguishes from inflammatory myopathy*
* polymyositis, dermatomyositis, inclusion body myositis, immune-mediated necrotizing myopathy