OTC HAIR test for illicit drugs, PDT-90

May 1997

    There's also an OTC hair test for illicit drugs, PDT-90.

    Hair testing is easier than urine testing...and it's more likely to detect occasional drug use.

    Urine tests only detect drug use in the past 3 to 4 days... hair tests can detect drug use during the past 3 months.

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