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HelpTest Code ACMP Acetaminophen
Laboratory Code
LAB43
Specimen Requirements
Submit only one of the following:
Preferred
Specimen Type: Serum
Container/Tube: Gold Top (SSTII)
Volume: 5.0 mL
Minimum Volume: 0.5 mL serum
Collection Instructions: Allow specimen to clot for 30 mins and centrifuge within 2 hrs.
Acceptable
Specimen Type: Plasma
Container/Tube: Green Top (Li Heparin/PST)
Volume: 4.5 mL
Minimum Volume: 0.5 mL plasma
Collection Instructions: Centrifuge within 2 hrs.
Specimen Stability
| Specimen Type | Serum/Plasma |
|---|---|
| Ambient | 24 hours |
| Refrigerate | 24 days |
| Frozen | 50 days |
Methodology
Enzymatic Assay
Days and Times Performed
24 hrs, TAT 1 day
Specimen Condition
| Gross Haemolysis | Alert/Reject |
|---|---|
| Icterus | OK |
| Gross Lipaemia | Alert/Reject |
| Others | Not applicable |
Reference Interval
| Toxic concentrations |
|---|
| > 50 mg/L after 12 hours |
| > 100 mg/L after 8 hours |
| > 200 mg/L after 4 hours |
Refer to Matthew Rumack normogram for specific timings.
Critical value: > 200 mg/L
Testing Laboratory
National University Hospital
Clinical Chemistry, 67724346
Useful For
Determination of toxicity.
Service Code
31801
LOINC Code Information
3298-7
Alias
Paracetamol
Panadol
Tylenol
Update
Last updated 10/03/2025