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A member asked:
Why would a narcotic drug test (both urine and blood) come back negative when the person is taking the prescribed narcotics?
4 doctors weighed in across 2 answers
Sensitivity: Depends on sensitivity of test. Also, some opioids like hydrocodone need gas chromatography to be detected sometimes.
Answered 5/1/2016
5.3k views
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See below: A common error occurs when a patient is prescribed an oxycodone preparation and they are tested for opioids only. The opioid test in urine will not test positive when a patient is on oxycodone or many other synthetics or semi-synthetic agents.
Answered 5/1/2016
5.3k views
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