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A 48-year-old female asked:

Can tylenol (acetaminophen) with codeine show as coke in a drug test my sister in law to a drug test, she was taking tylenol (acetaminophen) with codeine, the test came out positive for cocaine, can this happen?

3 doctor answers4 doctors weighed in
Dr. Laura McMullen
Pediatrics 23 years experience
Codeine : Codeine is in the opiate class of drugs such as heroin, oxycodone, and morphine so it would cause a drug test to be positive for opiates. Codeine would not cause a test to be positive for cocaine.
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Dr. Adam Front
Clinical Psychology 29 years experience
Not likely: Most drug tests use a first test, TLC or thin layer chromatography, as an initial screen. This test is prone to cross-reaction or "false positive" results for some substances. Usually if the TLC is positive, a second test, gcms or gas chromatography mass spectroscopy is used to confirm. This test is much more specific for specific molecules and not likely to yield false positive results.
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Dr. Bahman Omrani
Pain Management 19 years experience
Cocaine is cocaine: If Cocaine is positive on a confirmatory urine drug screen (e.g.Lc/ms), 99.99% it is cocaine. Specificity for both screening & confirmatory urine tests for Cocaine is very high, thanks to its unique molecular structure. Even similar substances in the -caine class such as lidocaie, marcaine, etc. Do not cause a false positive Cocaine on a urine drug screen.
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Similar questions

Jeannette, PA
A member asked:

Can tylenol (acetaminophen) with codeine show as coke in a drug test my sister in law to a drug test, she was taking tylenol (acetaminophen) with code?

1 doctor answer1 doctor weighed in
Dr. Richard Zimon
Internal Medicine 61 years experience
NOT: AS "COKE" (I assume you mean Cocaine..BUT a POSITIVE TEST for OPIATES will result! Hope this helpos! Dr Z
Created for people with ongoing healthcare needs but benefits everyone.
Last updated Dec 19, 2017

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