Incorporation of drugs for the treatment of substance abuse into pigmented and nonpigmented hair

Journal of Pharmaceutical Sciences
D G WilkinsD E Rollins

Abstract

Hair analysis for drugs may be useful for the long-term monitoring of recidivism and treatment compliance. L-alpha-Acetylmethadol, buprenorphine, and methadone are drugs that are used for the treatment of substance abuse. The purpose of this study was to study the relationship between dose, plasma concentration, hair concentration, and hair pigmentation for these compounds and their major metabolites in an animal model. Male Long-Evans rats received either L-alpha-acetylmethadol (1 and 3 mg/kg; n = 6), buprenorphine (1 and 3 mg/kg; n = 5), or methadone (4 and 8 mg/kg; n = 5) by intraperitoneal injection daily for 5 days. Fourteen days after beginning drug administration, newly grown hair was collected and analyzed for either L-alpha-acetylmethadol and two metabolites (L-alpha-acetyl-N-normethadol and L-alpha-acetyl-N,N-dinormethadol), methadone and two metabolites (D,L-2-ethyl-1,5-dimethyl-3,3-diphenylpyrrolinium and D,L-2-ethyl-5-methyl-3,3-diphenyl-1-pyrroline), or buprenorphine and one metabolite (norbuprenorphine). The plasma time course (AUC) for each compound was also determined after a single administration of each drug at the specified doses. There was an approximate dose-dependent increase in measured hair concentratio...Continue Reading

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Citations

Feb 9, 2011·International Journal of Legal Medicine·Gisela SkoppDerik Hermann
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Apr 7, 2011·Chemical Society Reviews·Ivan M Kempson, Enzo Lombi

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