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    What common substances can cause false positives on urine screens for drugs of abuse?

    Vincent, E. Chris
    Zebelman, Arthur
    Goodwin, Cheryl
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    [PDF] WhatSubstancesFalsePositivesUrine.pdf (64.15Kb)
    Date
    2006
    Format
    Article
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    Abstract
    False-positive reports on urine drug screens by immunoassay are rare (strength of recommendation [SOR]: C, small controlled-exposure studies, small case series). Nonsteroidal anti-inflammatory drugs, fluoroquinolones, and Vicks Inhaler are most frequently implicated (TABLE). Ruling out a false-positive result requires confirmation with a more specific test, usually gas chromatography/mass spectrometry (GC-MS). A true-positive drug screen may occur in a urine specimen from a patient who legally or unknowingly ingests a product that is metabolized to a drug of abuse. Passive exposure to a substance is unlikely to cause a positive drug screen (SOR: B, small controlled-exposure studies).
    URI
    http://hdl.handle.net/10355/3543
    Part of
    Journal of family practice, 55, no. 10 (October 2006): 893+
    Rights
    OpenAccess.
    This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License.
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    • Clinical Inquiries, 2006

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