Clozapine Treatment for Impulse Control Disorders in Parkinson's Disease Patients: A Case Series.

Impulse control disorders (ICDs) are nonmotor complications of dopaminergic medications characterized by problems in behavioral self-control. Common management involves discontinuing or lowering dopaminergic medication, often producing motor worsening. We performed a retrospective chart review of Parkinson's disease (PD) patients treated with clozapine for ICDs. Four patients treated with clozapine for ICD were identified. Three patients were men. All 4 took dopaminergic medications at the time that ICDs developed; all received dopamine agonist therapy. ICDs included compulsive shopping, binge drinking, and hypersexuality. All 4 patients had complete resolution of symptoms while taking clozapine (12.5-37.5 mg). Two patients discontinued clozapine because of side effects. Larger studies are needed to further evaluate clozapine's role in treating PD patients with ICD.