Acetaminophen Level Test
This test measures the amount of acetaminophen in your blood to check for an overdose, which can cause serious liver damage.
What this test measures
This test measures the amount of acetaminophen in your blood. Acetaminophen is a medicine used to relieve pain and reduce fever, found in many over-the-counter and prescription medicines.
What your results mean
Reference ranges vary by laboratory and by your age and sex. MedlinePlus does not publish a single normal range for this test — always read your result against the range printed on your own lab report and discuss it with your provider.
Higher-than-normal results
If results show a high level of acetaminophen, you or your child may be at risk for liver damage and may need immediate treatment.
Frequently asked questions
What is an acetaminophen level test?
It measures the amount of acetaminophen in your blood to check for an overdose.
Why might I need this test?
To find out if you or your child has taken too much acetaminophen.
How can an accidental overdose happen?
It can happen if you take more than one medicine containing acetaminophen or don't follow dose instructions.
What does a high result mean?
A high level may mean you are at risk for liver damage and need immediate treatment.
Will the test be repeated?
Yes, your provider may repeat the test every four to six hours to make sure you are out of danger.
Related lab tests
Sources
- MedlinePlus: Acetaminophen Level — NIH MedlinePlus
Last updated . Information is aggregated from official public sources and is not a substitute for professional medical care.