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Therapeutic Drug Levels

Salicylate Level

Normal range 15-30 (anti-inflammatory) mg/dL (1.1-2.2 mmol/L SI). Specimen: Serum.

Also known as: aspirin level, ASA level.

15-30 (anti-inflammatory) mg/dLToxicity threshold: read below

Reference range

Conventionalmg/dL
1530
SImmol/L
1.12.2

Combined adult band. LabVals does not publish separate men's, women's, or pediatric ranges for Salicylate Level; those can be narrower than the band shown.

Salicylate Level reference range, specimen, and conversion details
SpecimenSerum
Conventional range15-30 (anti-inflammatory) mg/dL
SI range1.1-2.2 mmol/L
Conversion factor×0.0724 (conventional → SI)
Toxicity threshold> 40-50 mg/dL (tinnitus, tachypnea, acid-base disturbance)
PanelTherapeutic Drug Levels

Convert any Salicylate Level result between units on the unit converter.

What is the normal range for Salicylate Level?

The standard teaching reference range for Salicylate Level is 15-30 (anti-inflammatory) mg/dL in conventional units, or 1.1-2.2 mmol/L in SI units. This value is measured in serum.

What toxicity threshold is taught for Salicylate Level?

For Salicylate Level, the commonly taught toxicity threshold is: > 40-50 mg/dL (tinnitus, tachypnea, acid-base disturbance).

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.

At the bedside

Nursing considerations

  • Toxicity causes tinnitus and a mixed respiratory alkalosis with metabolic acidosis; monitor ABGs.
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