Calculate Antipscyhotic Dose Equivalents with chlorpromazineR

This calculator can be used to calculate antipsychotic dose equivalents based on the reported literature (see references below).

*This is beta software and may contain errors. It is not meant to be used to guide clinical decisions. Interpretation of the conversion depends on understanding the methods and limitations of the underlying research (see references below).

For bulk calculation or research use, the R package chlorpromazineR is more appropriate. Please see the documentation for data sources and references, limitations and other important details.

Shiny App Author: Eric E. Brown


Brown, Eric, Parita Shah, and Julia Kim. ChlorpromazineR: Convert Antipsychotic Doses to Chlorpromazine Equivalents. (2019). Comprehensive R Archive Network. <>
Davis, J. (1974). Dose equivalence of the anti-psychotic drugs. Journal of Psychiatric Research, 11, 65-69. <>
Gardner, D. M., Murphy, A. L., O’Donnell, H., Centorrino, F., & Baldessarini, R. J. (2010). International consensus study of antipsychotic dosing. The American Journal of Psychiatry, 167(6), 686–693. <>
Leucht, S., Samara, M., Heres, S., & Davis, J. M. (2016). Dose Equivalents for Antipsychotic Drugs: The DDD Method. Schizophrenia Bulletin, 42(suppl_1), S90–S94. <>
Leucht, S., Crippa, A., Siafis, S., Patel, M., Orsini, N. & Davis, J. M. (2020). Dose-Response Meta-Analysis of Antipsychotic Drugs for Acute Schizophrenia. American Journal of Psychiatry. 117(4) <>
Woods, S. (2003). Chlorpromazine Equivalent Doses for the Newer Atypical Antipsychotics. Journal of Clinical Psychiatry. 64(6). 663-667. <>