Does Tylenol 3 (acetaminophen with codeine) show up as opioids on a Urine Drug Screen (UDS)?

Tylenol 3 Detection on Urine Drug Screens

Yes, Tylenol 3 (acetaminophen with codeine) will show up as an opioid on standard urine drug screens because codeine is detected by the opiate immunoassay panel of most standard urine drug tests. 1, 2

How Codeine is Detected on UDS

• Standard urine drug screens (UDS) use immunoassay technology that detects morphine and codeine in the "opiates" category 1, 2
• Codeine is the active opioid ingredient in Tylenol 3 3
• Detection window for codeine in urine is typically 1-3 days after use 2
• The standard 10-panel urine drug screen includes testing for opiates, which will detect codeine 2

Important Considerations for Interpretation

Metabolic Pathways

• Codeine is metabolized to morphine in the body, so both substances may appear in the urine 4
• Interestingly, codeine can also be metabolized to hydrocodone in small amounts (up to 11% of parent drug concentration) 4
• This means a patient taking only Tylenol 3 might test positive for:
  • Codeine (primary drug)
  • Morphine (major metabolite)
  • Hydrocodone (minor metabolite) 4

Potential Pitfalls in Interpretation

• False positives are possible with immunoassay screening tests 2
• The acetaminophen component of Tylenol 3 will not affect the opiate portion of the UDS 5
• Standard opiate screens detect morphine and codeine but may not detect synthetic opioids like oxycodone or hydrocodone without specific testing 1
• Confirmatory testing using gas chromatography-mass spectrometry (GC-MS) or liquid chromatography-mass spectrometry (LC-MS) is recommended to verify positive screening results 2, 6

Clinical Implications

• When monitoring patients on chronic opioid therapy, UDS should be performed at baseline and at least annually 1, 2

• Finding codeine in a UDS indicates either:

  1. Prescribed use of codeine-containing products like Tylenol 3
  2. Illicit/non-prescribed codeine use
  3. Possible heroin use (as heroin metabolizes to morphine with possible codeine impurities) 7

• Unexpected UDS results should prompt a conversation with the patient rather than immediate punitive action 1, 2

• Clinicians should establish a working relationship with laboratory toxicologists to assist with result interpretation 1, 2

Bottom Line

For healthcare providers interpreting UDS results, a positive opiate test in a patient taking Tylenol 3 is expected and consistent with appropriate medication use. Confirmatory testing can differentiate between various opioids when needed for clinical decision-making.