J Neuropsychiatry Clin Neurosci 1996; 8:276-280
Copyright © 1996 by American Neuropsychiatric Association
Clozapine for the treatment of psychosis in Parkinson's disease: chart review of 49 patients
ML Wagner, JL Defilippi, MA Menza and JI Sage
Department of Pharmacy Practice, Rutgers, State University of New Jersey, Piscataway 08855-0789, USA.
The records of 49 patients with Parkinson's disease and psychosis who were
treated with clozapine for up to 18 months were reviewed. Average starting
dose of clozapine was 16 mg. Average maximum dose was 39 mg. The psychotic
symptoms improved in 76% of the patients at 3 months, and response to
clozapine within the first year ranged from 71% to 80%. This response
allowed a maximization of levodopa dose. Improvements in scores on the
Unified Parkinson's Disease Rating Scale and tremor subscale were seen in
some patients but were not statistically significant. This study, the
largest of its kind to date, suggests that clozapine is well tolerated and
effective in treating psychosis in patients with Parkinson's disease.