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    frannygirl's Avatar
    frannygirl Posts: 1, Reputation: 1
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    #1

    May 25, 2010, 07:06 AM
    What can cause a false positive taking a saylvia swab drug test
    My last swab test came up positive for methadone and its been weeks since I took it how could be
    JudyKayTee's Avatar
    JudyKayTee Posts: 46,503, Reputation: 4600
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    #2

    May 25, 2010, 08:12 AM

    An expert will come along with more info than I have but have you seen this? [url]http://www.passthetest.com/false_positives.htm
    sarsface's Avatar
    sarsface Posts: 3, Reputation: 2
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    #3

    Nov 4, 2011, 08:51 PM
    In all likeliness, it wasn't a false positive. With a saliva test, methadone can typically be detected up to 10 days after ingestion. Everyone's metabolism is different, and with prolonged heavy use, I'd say it's quite possible that they found trace amounts in your saliva. All I can suggest is to request another test run on the sample they took. In most cases, protocol for suspected false positives is to retest the original sample at the subject's expense.
    sarsface's Avatar
    sarsface Posts: 3, Reputation: 2
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    #4

    Nov 4, 2011, 08:53 PM
    How long exactly had it been from the last dose you took and the swabbing?
    JudyKayTee's Avatar
    JudyKayTee Posts: 46,503, Reputation: 4600
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    #5

    Nov 5, 2011, 05:41 AM
    This is from May 2010 and the person who asked has not been back.

    Please keep an eye on the dates.

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