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A Survey of Drug-Induced Extrapyramidal Reactions

Ayd, Frank J.·1961·JAMA

Abstract

Among 3,775 patients treated with tranquilizers of the phenothiazine group, 1,472 developed extrapyramidal reactions; 21.2% had akathisia, 15.4% parkinsonism, and 2.3% dyskinesia. There was correlation between the absolute frequency of these reactions and the chemical structure and milligram potency of the phenothiazine derivative used. Akathisia and parkinsonism occurred twice as often in women as in men, but dyskinesia happened twice as often in men. Dyskinesia was most prevalent between ages 5 and 45, akathisia between 12 and 65, and parkinsonism between 15 and 80. Dyskinesia occurred the earliest, akathisia next, and parkinsonism last in the course of treatment. These reactions appeared only in neurologically susceptible patients. A close parallel was found between drug-induced and naturally occurring extrapyramidal reactions. Drug-induced striopallidal symptoms can be adequately treated with antiparkinsonian drugs.

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Metadata

Authors
Ayd, F. J.
Venue
JAMA
Published
1961-03-25
Volume
175
Issue
12
Pages
1054
ISSN
  • 0002-9955 (ISSN-L)
  • 0098-7484
OpenAlex
W2069837065
Cited by
753
References
0
FWCI
47.75
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: A Survey of Drug-Induced Extrapyramidal Reactions. https://app.cochat.ai/papers/10.1001/jama.1961.03040120016004
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Ayd, F. J. (1961). A Survey of Drug-Induced Extrapyramidal Reactions. JAMA. https://doi.org/10.1001/jama.1961.03040120016004

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