PharmChem Inc. Federal Drug Patch  http://www.ncbi.nlm.nih.gov/pubmed/24071814 Application     of Sweat Patch Screening for 16 Drugs and Metabolites Using a Fast and Highly Selective LC-MS/MS Method.

PharmChek™' sweat collection patch. The patch is unique in that it is tamper-evident and adulteration is not possible.

PharmChek drugs of abuse sweat patches :

This is a state of the art, Tamper-resistant patch that ensures a successful reading every time. This new-age patch detects cocaine, opiates (heroin, morphine, codine), amphetamines, PCP, and marijuana, testing 24 hours a day and provides a sanitary, non-urine approach to drug testing.

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