The PharmChek® Sweat Patch is exclusively screened by ELISA and confirmed by LC/MS/MS at our contract laboratory, Clinical Reference Lab, located in Lenexa, KS.

All PharmChek® Sweat Patches must be sent to Clinical Reference Lab (CRL) for analysis. No other lab is approved or certified to test the PharmChek® Sweat Patch.

Standard Panel:

Cocaine, Benzoylecgonine
Opiates (Heroin, 6-AM; Morphine, codeine)
Marijuana, THC
Phencyclidine, PCP

Expanded Opiate Panel:


*This panel cannot be purchased independent of the Standard Panel.*

Sweat analysis allows the laboratory to identify both the parent drug and metabolite. With urine, the laboratory usually identifies only drug metabolites to determine if drug use occurred.

PharmChek® functions as a storage device where drugs are retained on the absorbent pad for detection at the laboratory.

Download the PharmChek® Sweat Patch Technical FAQ Download the PharmChek® Sweat Patch Training Manual