OTC HAIR test for illicit drugs, PDT-90

    You'll also see an OTC HAIR test for illicit drugs, PDT-90. It's being stocked now by Walgreens and Eckerds.

    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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