Comparison of Haloperidol and Chlorpromazine in the Treatment of Phencyclidine Psychosis

Abstract
Two neuroleptics, haloperidol and chlorpromazine, have been reported to be effective in the treatment of phencyclidine (PCP) psychosis. Both neuroleptics are thought to exert their antipsychotic PCP effects by blockade of central dopamine receptors. They have been studied extensively in animal populations and less extensively in human populations. There has, however, been no comparison of their relative effects in human populations. We describe such a study below.

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