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[Therapeutic drug monitoring: A pharmacotherapeutic tool in psychiatry]

Author(s): Stephan PL, Etzensberger M, Sirot EJ

Affiliation(s): Psychiatrische Dienste Aargau AG, Klinik Konigsfelden, Brugg.

Publication date & source: 2006-04-26, Schweiz Rundsch Med Prax., 95(17):671-8.

Publication type: Case Reports

Therapeutic drug monitoring (TDM) is used increasingly for managing psychiatric outpatients, where the preanalytic error risk is high. Blood samples must be collected under steady-state conditions immediately before ingestion of the morning dose or before the next injection. In order to interpret the plasma levels accurately, age, gender, ethnicity, compliance, drug dosage, renal and hepatic function and comedication incl. smoking habits and diet (esp. caffeine intake and consumption of grapefruit juice) have to be taken into account. If in doubt, aberrant plasma levels should be confirmed by a second control under optimized conditions. Pharmacogenetic testing enables the identification of abnormal metabolizers. TDM and pharmacogenetic tests are useful tools to improve pharmacotherapy by preventing dose-dependent adverse drug events, optimizing dosage during long-term treatment and identifying ultrarapid metabolizers and malcompliance.

Page last updated: 2006-11-04

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