Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Email this article to a Colleague Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Add to My Articles & Searches Download to citation manager Articles by de Leon, J. Articles by Cozza, K. L. PubMed Citation Articles by de Leon, J. Articles by Cozza, K. L. Atypical Neuroleptics

A Preliminary Attempt to Personalize Risperidone Dosing Using Drug–Drug Interactions and Genetics: Part I

From the University of Kentucky Mental Health Research Center, Eastern State Hospital, Lexington, KY; Eastern State Hospital, Lexington, KY; and the College of Medicine, University of Kentucky, Lexington, KY. Send correspondence and reprint requests to Jose de Leon, M.D., Mental Health Research Center at Eastern State Hospital, 627 West 4th St., Lexington, KY 40508. e-mail: jdeleon{at}uky.edu
© 2008 The Academy of Psychosomatic Medicine

BACKGROUND: Personalized prescription is described even in lay journals, but there has been no attempt to propose personalizing dosing for any specific psychiatric drug. OBJECTIVE: Any attempt to develop personalized dosing needs to be anchored in our understanding of the pharmacological response of each drug in each person’s environment, particularly drug–drug interactions (DDIs) and how genetic make-up influences drug response. METHOD: Risperidone (R) is used as an example. R’s pharmacologic response is reviewed in detail by focusing on our current knowledge of its pharmacodynamic and pharmacokinetic actions. The influences of the environment and genetics on these two actions are reviewed. RESULTS: R’s antipsychotic action is probably mainly explained by the blocking of dopamine receptors, particularly D₂ receptors. There are polymorphic variations of this gene (DRD₂), but it is not clear that they have clinical relevance in predicting adverse drug reactions (ADRs) or antipsychotic response. CONCLUSION: Previous exposure to antipsychotics increases the need for higher R dosing, but the mechanism for this tolerance is not well understood. Other brain receptors, such as other dopamine, serotonin, and adrenergic receptors may explain some of these ADRs. Some polymorphic variations in these receptors have been described, but they cannot yet be used to personalize R dosing.

Key Words: Risperidone • Dosing • Genetics

Get information about faster international access.

Privacy Policy

Copyright © 2008 Academy of Psychosomatic Medicine. All rights reserved.

Home | Search | Current Issue | Past Issues | Subscribe | All APPI Journals | Help | Contact Us