Antischizophrenic Drugs and Brain Cholinergic Receptors: Affinity for Muscarinic Sites Predicts Extrapyramidal Effects

Solomon Snyder, David Greenberg, Henry I. Yamamura

Research output: Contribution to journalArticlepeer-review

Abstract

With only a few exceptions, the phenothiazines and butyrophenones used in the treatment of schizophrenia appear to exert antischizophrenic actions to the same or closely similar degrees. Both antischizophrenic and extrapyramidal effects apparently result from dopamine receptor blockade. Here, we report the influence of a variety of such antischizophrenic drugs on the brain's receptor for the muscarinic action of acetylcholine. Extrapyramidal effects are inversely proportional to affinity for the muscarinic receptor. Thus, drugs such as clozapine and thioridazine hydrochloride apparently owe their low incidence of extrapyramidal effects to anticholinergic properties that compensate for their intrinsic extrapyramidal effects. Our findings provide a means to predict extrapyramidal actions of new potential antischizophrenic drugs.

Original languageEnglish (US)
Pages (from-to)58-61
Number of pages4
JournalArchives of general psychiatry
Volume31
Issue number1
DOIs
StatePublished - Jul 1974

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Psychiatry and Mental health

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