PharmChek® is a collection device designed to retain evidence of drug use over the course of wear-time. Detection Periods in sweat differ from those in urine.

Results cannot be used to:

  • Determine the dose of drugs taken
  • Determine the exact time of usage
  • Determine if multiple small doses or one large dose of drug was ingested

Testing Methods & Cutoff levels

Drug or Drug Class Analyte

Cocaine: EIA 10 ng/mL
Benzoylecgonine: 10 ng/mL

Opiates: EIA 10 ng/mL
6-MAM: 10 ng/mL
: 10 ng/mL
: 10 ng/mL
: 10 ng/mL
: 10 ng/mL
: 10 ng/mL
Oxymorphone: 10 ng/mL

Amphetamines: EIA 
10 ng/mL
Amphetamine: 10 ng/mL
Methamphetamine: 10 ng/mL

Marijuana: EIA 1.5 ng/mL
THC: 0.5 ng/mL

Phencyclidine: EIA 7.5 ng/mL
Phencyclidine: 7.5 ng/mL

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