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A member asked:
Does a negative drug test mean you are clean from drugs? pictures? explanation.
A doctor has provided 1 answer
Not necessarily: A drug test can have false negative results: sometimes a person can add chemicals to a urine sample to "hide" the drugs you are testing for. Sometimes people can substitute another person's urine or dilute urine. There are ways to get around a urine drug test. A sophisticated during testing facility will witness the provision of a urine sample and maintain the integrity of the chain of possession.
Answered 4/7/2013
5.2k views
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