positive or negative

  1. A

    Bath salts (bk-MDMA, 4-MMC, MDPV...) give positive results in anti-drug tests for substances such as MDMA, amphetamine...?

    Question 
    I have doubts as to whether bath salts (bk-MDMA, 4-MMC, MDPV...) give positive results in the reactive anti-drug tests used to detect MDMA, Amphetamine...) or not... Thank you all!!
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