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Background  Aripiprazole can cause irreversible tardive dystonia in some individuals, and additional intervention is sometimes needed. Here, we report the first case of aripiprazole-induced irreversible tardive dystonia in which complete recovery of motor function was achieved using the antipsychotic drug clozapine.    Case presentation  A 24-year-old man with bipolar disorder was treated with aripiprazole and gradually developed tardive dystonia. Thorough medical and neurological examinations were performed to rule out other possible causes of tardive dystonia. Clozapine was administered when the patient did not improve following long-term withdrawal of aripiprazole or adjuvant medications. Before administration of clozapine, the patient was experiencing severe dystonia as assessed by the Extrapyramidal Symptom Rating Scale. Dystonic symptoms began to improve about 1 month after starting administration of clozapine and were completely resolved 3 months after clozapine administration.    Conclusions  Clinicians should note the risk of aripiprazole-induced tardive dystonia and consider clozapine as an alternative and effective treatment modality in cases of irreversible tardive dystonia, particularly when concomitant treatment of psychotic symptoms is required.

Remission of irreversible aripiprazole-induced tardive dystonia with clozapine: a case report