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Acetaminophen
Test Code3536
Alias/See Also
Datril; Tylenol
Preferred Specimen
One 5 mL plain red.
Minimum Volume
1 mL serum at 2-8°C. (Min: 0.5 mL) Submit specimen in an ARUP Standard Transport Tube.
Transport Temperature
1 mL serum at 2-8°C. (Min: 0.5 mL) Submit specimen in an ARUP Standard Transport Tube.
Specimen Stability
After separation from cells: Ambient: 2 weeks; Refrigerated: 2 weeks; Frozen: 45 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Plasma. Specimens collected in separator tubes, sodium fluoride/potassium oxalate, or sodium citrate anticoagulants.
Methodology
Spectrophotometry
Setup Schedule
Sun-Sat
Report Available
Within 24 hours
Limitations
Avoid use of separator tubes.
Clinical Significance
Acetaminophen concentrations greater than 150 µg/mL at four hours after ingestion and 40 µg/mL at 12 hours after ingestion are often associated with toxicity.
