Were positive for cocaine in urine, sweat, and hair while others were positive for cocaine in only one of those samples. Sweat patch analysis was positive for methadone and its metabolite EDDP in 100% of patients. Samples collected at the beginning of the study and after 7 days, as well as those from the analysis of hair collected on The results were compared to those from the analysis of urine The Public Service for the Treatment of Drug Dependence of Perugia (Italy) were monitored for 14 days by the analysis of methadoneĪnd cocaine present in two sweat patches, each worn for 7 days. Forty-eight patients receiving methadone at It may be advantageous to use sweat, rather than blood or urine, to monitor individuals' drug exposure for the purposes ofĭrug treatment programs, employment initiatives, and forensic investigations.
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