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Blood Sciences Test



Special Instructions

Units mg/L

Reference Range

Interpretation of serum salicylate levels

Salicylate (mmol/L) Salicylate (mg/L) Interpretation
Less than 2.2 mmol/L Less than 300 mg/L “Therapeutic”
2.3 – 3.6 mmol/L 301 – 500 mg/L Mild toxicity
3.7 – 5.5 mmol/L 501 – 750 mg/L Moderate toxicity
More than 5.6 mmol/L More than 750 mg/L Severe toxicity

N.B. In children, lower levels should be considered to be toxic.

Test Usage

Samples from patients receiving N-acetyl cysteine therapy for paracetamol poisoning will invalidate the salicylate result.

Samples that contain paracetamol may produce a positive bias on the measured salicylate level.

Please contact the laboratory for further advice. ext 2935

Turnaround Time

1 day


Local test

Can be added on to an existing request up to 4 days following sample receipt

Specimen Labelling Procedure
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