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John M. Davis, MD

Arch Gen Psychiatry. 1976;33(7):858-861.

Abstract
• It is clinically useful to have a table listing the equivalent doses of the various neuroleptics to a standard, such as chlorpromazine. This article derives such data by reviewing doubleblind controlled studies that used a flexible dosage schedule of neuroleptics in treating schizophrenic patients. Each neuroleptic is then converted to 100-mg chlorpromazine equivalents. This empirically derived dosage comparability table is compared with a similar table derived from the opinions of experts. Since these comparable doses produce equivalent amounts of antipsychotic activity, the cost to provide such medication was then calculated, and a table comparing the costs of the different neuroleptics was constructed. In absolute amounts, the cost differences between drugs are small. However, for any drug, large savings accrue when the largest possible capsule or tablet to achieve the desired dose is prescribed.

Author Affiliations
From the Illinois State Psychiatric Institute, Chicago, and the Pritzker School of Medicine, University of Chicago.

Footnotes
Accepted for publication July 8, 1975.

Reprint requests to Illinois State Psychiatric Institute, 1601 W Taylor St, Chicago, IL 60612 (Dr Davis).

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