Uptake of Drugs Different for Cosmetically Treated Hair

Is Uptake of Drugs Different for Cosmetically Treated Hair  

Hair washing survey. Results of a convenience sample of 74 middle-class high school students who were asked How often do you wash your hair . The distributions were normalized for each sex and ethnicity. The total number of individuals of each type is given in the inset table. (Data from Blank, D. L. and Kidwell, D. A., Forensic Sci. Int., 70, 13, 1995.) 

Henderson and co-workers demonstrated an even more pronounced effect on the retention of cocaine after a permanent wave solution was applied. The amounts of cocaine incorporated from crack cocaine smoke prior to treatment were as follows Asian, 52.6ng/mg hair Caucasian brown, 22.7 ng/mg hair and Caucasian blond, 14.9ng/mg hair. After treatment, these concentrations drop to Asian, 8.2 ng/mg hair Caucasian brown, 2.2 ng/mg hair and Caucasian blond, 0.8 ng/mg hair. The percentage decreases from the untreated hair were similar Asian, 84% Caucasian 

Marques and colleagues also suggest the loss of drugs from the hair matrix due to cosmetic treatments. In studying the concentration of cocaine in the hair of mother/ infant pairs, they found that it was possible to increase the correlation between the amount of cocaine in the mother s hair and the infant s hair by eliminating 

Are there Inaccessible Regions in Hair, and Why Are They Important  

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