Acetaminophen Quantitative, Urine
Also known as: ACETA U
Use
The Acetaminophen Quantitative, Urine test is used to assess exposure to acetaminophen and monitor patient adherence to drug therapy. By measuring the concentration of acetaminophen in urine, healthcare providers can determine if a patient has been taking their medication as prescribed and assess the risk of overdose or liver toxicity. It is an important test for managing patients who are on acetaminophen therapy for pain relief or other indications.
Special Instructions
This test is performed by NMS Labs and not at ARUP, so separate specimens must be submitted when multiple tests are ordered. Test results are typically reported within a timeframe dependent on the lab but involve high-performance methodology for accuracy.
Limitations
As acetaminophen is rapidly metabolized and excreted as conjugates in urine, this test measures only a small fraction of the dose that is excreted unchanged. Therefore, a non-detection does not necessarily indicate no exposure or ingestion, but rather that levels are below the limit of detection. It is important to consider additional clinical information and patient history for accurate interpretation.
New York Approved
Methodology
Mass Spectrometry
Biomarkers
LOINC Codes
- 13622-6
Result Turnaround Time
5-8 days
Related Documents
For more information, please review the documents below
Specimen
Urine
Volume
1 mL
Minimum Volume
0.3 mL
Container
ARUP standard transport tube
Collection Instructions
Collect a random urine sample and transfer it to an ARUP standard transport tube.
Storage Instructions
Refrigerated; also acceptable at room temperature or frozen.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 1 month |
| Refrigerated | 1 month |
| Frozen | 1 month |