Clozapine for psychosis in Parkinson's disease

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Abstract
The clinical efficacy of clozapine, an atypical antipsychotic, in treating levodopa‐induced hallucinations was investigated in five patients with Parkinson's disease under open label conditions. Two patients could not tolerate clozapine, even in doses as low as 12.5–25 mg daily, because of extreme sedation. Three patients could tolerate clozapine and experienced improvement or elimination of their hallucinations at doses below 100 mg daily. Despite a significant risk of adverse effects, cautious use of clozapine in low doses may be beneficial for patients with levodopa‐induced psychosis who do not respond to more conservative measures.

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