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Salicylate concentration in serum/plasma

Published: August 9, 2026Updated: August 17, 2026

This test measures the amount of salicylate (aspirin) in your blood, often checked if you’ve taken high doses or experienced poisoning.

Quick summary

["Salicylate levels help assess overdose risk or monitor long-term aspirin use."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 17, 2026Editorial policy

Key facts at a glance

LOINC
35130-4
Short code
Salicylates Spec Ql
Synonyms
Salicylates Spec Ql
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Critical range
— – 50 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your healthcare provider may order this test if you’ve accidentally taken too much aspirin, have symptoms like nausea, ringing in your ears, or confusion. It’s also used in cases of suspected aspirin toxicity, especially in children or people with liver/kidney issues.

What to Expect Before the Test

No special preparation is needed. You’ll have a small needle inserted into your arm or vein to draw blood. The process takes a few minutes, and you may feel a brief pinch.

What the Results Mean

Salicylate levels above normal can indicate overdose or improper metabolism. Very high levels may require immediate medical attention. Your provider will interpret results based on your symptoms and medical history.

Common Causes of Abnormal Results

Elevated salicylate levels often result from accidental overdose (e.g., child ingesting aspirin), intentional poisoning, or excessive long-term use (e.g., in high-dose pain relievers). Kidney/liver problems can also affect how aspirin is processed in your body.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Salicylate Level

Frequently asked questions

How is this test different from other aspirin-related tests?
This test specifically measures the direct salicylate (aspirin) concentration in your blood, unlike other tests that may assess related markers like uric acid or kidney function indirectly.
Can I eat or drink before this test?
You can eat and drink normally unless your provider specifies otherwise. Most blood tests don’t require fasting.
What if my results are high?
If your salicylate levels are high, your provider will review your symptoms, dose history, and lab results to determine next steps. Treatment may include supportive care, activated charcoal, or dialysis if needed.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 17, 2026. · Read our editorial policy