Movement disorders associated with aripiprazole use: a case series.

Aripiprazole is an atypical antipsychotic that is a partial agonist at the D2 and 5HT1a receptors and an antagonist at 5HT2a receptors. Despite previous hypotheses that it would be less likely to cause movement disorders, recent reports suggest it actually may be more likely to cause movement disorders than other atypical antipsychotics. This case series illustrates the variety of movement disorders associated with aripiprazole use at three movement disorder clinics. It also suggests that aripiprazole be used with caution in patients with a prior history of dystonia, parkinsonism, or previous tardive dyskinesia.