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Original Articles

Cocaine as a Risk Factor for Neuroleptic-Induced Acute Dystonia

Peter N. van Harten, Jan C. A. M. van Trier, Ernst H. Horwitz, Glenn E. Matroos, and Hans W. Hoek

Published: March 15, 1998

Article Abstract

Background: A prospective study was conducted totest the hypothesis that cocaine use is a risk factor forneuroleptic-induced acute dystonia (NIAD).

Method: The study sample consisted of ahigh-risk group for NIAD, males aged 17_45 years who had receivedhigh-potency neuroleptics within 24 hours of admission and hadnot used neuroleptics in the month prior to admission. Patientswere excluded if they suffered from a neurodegenerative disorderor were exposed to anticholinergics, benzodiazepines,promethazine, carbamazepine, phenytoin, or levodopa during thestudy. Twenty-nine patients—9 cocaine users and 20nonusers—entered the study, which lasted 2 years. Patientswere followed for 7 days.

Results: Cocaine-using psychiatric patientsdeveloped significantly more NIAD than did nonusers (relativerisk=4.4, 95% CI=1.4 to 13.9).

Conclusion: Cocaine use is a major risk factorfor NIAD and should be added to the list of well-known riskfactors. The authors strongly suggest that cocaine-usingpsychiatric patients who are started on a regimen of neurolepticsshould also be administered an anticholinergic for at least 7days to prevent NIAD.

Volume: 59

Quick Links: Neurologic and Neurocognitive , Neurology

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