All tests · Therapeutic Drug Levels
Therapeutic Drug Levels
Normal range 10–30 (therapeutic) µg/mL (66–199 µmol/L SI). Specimen: Serum (timed after ingestion).
Also known as: paracetamol level, APAP.
| Specimen | Serum (timed after ingestion) |
|---|---|
| Conventional range | 10–30 (therapeutic) µg/mL |
| SI range | 66–199 µmol/L |
| Conversion factor | ×6.62 (conventional → SI) |
| Critical value | > 150 µg/mL at 4 h post-ingestion risks hepatotoxicity |
| Panel | Therapeutic Drug Levels |
Convert any Acetaminophen Level result between units on the unit converter.
The standard teaching reference range for Acetaminophen Level is 10–30 (therapeutic) µg/mL in conventional units, or 66–199 µmol/L in SI units. This value is measured in serum (timed after ingestion).
A commonly taught critical (panic) value is > 150 µg/mL at 4 h post-ingestion risks hepatotoxicity. Critical results are reported to the provider immediately under your facility's policy.
Source: Adult reference values compiled from Pagana & Pagana, Mosby's Diagnostic and Laboratory Test Reference, and Fischbach & Dunning, A Manual of Laboratory and Diagnostic Tests. Reference ranges vary by laboratory, method, age, sex, and population — always use the range printed on the actual result.
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