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- W2078341552 abstract "The accurate interpretation of analytical results from hair testing for drugs of abuse continues to be a complex and difficult problem since many questions still remain unanswered. In this paper an animal model was developed to ascertain the time course for the appearance and disappearance of cocaine and its metabolite benzoylecgonine (BE) in hair. Female Fauve Bourgogne red-haired rabbits (n = 6) were intraperitoneally administered a single dose of cocaine at 5 mg/kg. Animal hair was shaved just before drug administration and the newly grown back hair was subsequently shaved and collected daily over a period of two weeks. Samples were analyzed for cocaine and BE by gas chromatography-mass spectrometry (GC-MS). The profiles were quite similar for parent drug and metabolite. Cocaine and BE appeared in the first sampling (day 1), with peak concentration appearing that same day: 1.01 ng/mg and 0.51 ng/mg for cocaine and BE, respectively. Levels declined rapidly on day 2, remaining detectable for ten days after drug administration. This study demonstrates that the initial incorporation of cocaine compounds in rabbit hair is very rapid (24 h). A small fraction of the drug is detected ten days after exposure, at a time when concentrations in other biological specimens (blood or urine) are not detectable." @default.
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- W2078341552 date "1997-01-01" @default.
- W2078341552 modified "2023-10-16" @default.
- W2078341552 title "Time course of cocaine in rabbit hair" @default.
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- W2078341552 doi "https://doi.org/10.1016/s0379-0738(96)02049-x" @default.
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