Usefulness of Sweat Testing for the Detection of MDMA after a Single-Dose Administration*
Journal of Analytical Toxicology July 1, 2003 Simona Pichini, M.d. Sánchez Navarro, Roberta Pacifici et al. 66 citations
After a single 100-mg dose of MDMA, the drug appears in sweat within 1.5 hours and peaks at 24 hours, but the amount varies up to 30-fold between individuals, ranging from 3.2 to 1326.1 ng per patch. Only traces of the metabolite MDA are detected. An onsite sweat strip test is positive at 1.5 hours, though 18% false-negative results occur in the first 6 hours. Sweat patch and onsite strip testing offer noninvasive ways to monitor MDMA use.