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The PharmChek® Drugs of Abuse Detection Patch acts as a collector for nonvolatile components of sweat, including drugs of abuse. It consists of an adhesive plastic film that holds an absorption pad in place against the skin.

The adhesive film of the patch is a semi-permeable barrier that allows oxygen, carbon dioxide, and water vapor to pass through so that the skin can breathe normally. Larger molecules (such as drugs) are trapped in the absorption pad portion of the patch. Contaminants from the environment cannot penetrate the adhesive barrier from the outside, so the patch can be worn during normal activities including bathing, swimming, and athletics.

  • Features


    • Tests for both the drug metabolite and the parent drug
    • 24 hours per day, up to 14 days continuous wear time
    • Retains drugs used any time during wear period
    • Cannot be diluted and is tamper-evident
    • Tests for:
      • Cocaine
      • Opiates
      • Amphetamines
      • PCP
      • Marijuana (THC)

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