A Case Report of Methylphenidate-Induced Dyskinesia

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Sir: Movement disorders have long been associated with awide variety of medications and illicit drugs. Dopaminergicagents are well-known precipitants of various dyskinesias, includingchorea, choreoathetosis, dystonia, and ballism. For example,levodopa-induced dyskinesias are a relatively commonside effect of the treatment of Parkinson’s disease, with up to45% of patients affected after 5 years of such treatment.¹