PharmChem Inc, based in Fort Worth, TX, holds worldwide marketing and sole distribution rights to the FDA Cleared PharmChek® Drugs of Abuse Sweat Patch. The Sweat Patch uses sweat as the specimen source to test for Methamphetamine, Amphetamine, Cocaine, THC, PCP, and Opiates, in addition to offering an expanded panel for synthetic opiates. Worn on the body for 7-10 days, the Sweat Patch provides 24/7 monitoring for drugs of abuse. The wear-time can also be extended up to 14 monitoring days with the use of our Sweat Patch Overlay, (optional). The Sweat Patch technology is tamper-evident, cannot be diluted, substituted, or adulterated without detection, and is confirmed by LC/MS/MS for both parent drug and drug metabolite.