Journal Article

Interindividual Dose/Concentration Relationship for Methadone in Hair

Sue Paterson, Rosa Cordero, Mike McPhillips and Suzannah Carman

in Journal of Analytical Toxicology

Volume 27, issue 1, pages 20-23
Published in print January 2003 | ISSN: 0146-4760
Published online January 2003 | e-ISSN: 1945-2403 | DOI:
Interindividual Dose/Concentration Relationship for Methadone in Hair

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Hair samples were collected from 60 patients receiving long-term methadone maintenance: 50 were taking the drug orally and 10 were receiving the drug by intravenous injection. The amount of methadone present in the hair samples was measured using methanolic extraction, derivatization of the extracts with MTBSTFA, followed by electron impact gas chromatography-mass spectrometry operating in selected ion monitoring mode. The limit of quantitation for the assay was 0.4 ng/mg hair. The dose/concentration relationship for methadone in hair was investigated. No interindividual correlation between prescribed dose and concentration of methadone in hair was observed.

Journal Article.  0 words. 

Subjects: Medical Toxicology ; Toxicology (Non-medical)

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