The PharmChek® Drugs of Abuse Sweat Patch is a collection device designed to retain evidence of drug use over the course of 1-14 days. Detection Periods in sweat differ from those in urine

Results cannot be used to:

  • Reflect the dose of drugs taken.
  • Reflect the time of use.
  • Determine if multiple small doses or one large dose of drug is 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
    Morphine
: 10 ng/mL
    Codeine
: 10 ng/mL
    Hydrocodone
: 10 ng/mL
    Hydromorphone
: 10 ng/mL
    Oxycodone
: 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® Drugs of Abuse Sweat Patch Training Manual Download the PharmChek® Drugs of Abuse Sweat Patch Technical FAQ