Atorvastatin-Specific Neutralizing IgM Antibodies, Serum/Plasma — Qualitative
A qualitative blood test that looks for atorvastatin-specific neutralizing IgM antibodies in serum or plasma.
["Detecting these antibodies means the blood contains immune proteins directed against atorvastatin."]
Key facts at a glance
- LOINC
- 73053-1
- Short code
- Atorvastatin (neut) IgM SerPl Ql FC
- Synonyms
- Atorvastatin (neut) IgM SerPl Ql FC
- Category
- liver
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Ref low
- 10
- Ref high
- 40
- Critical range
- — – 500 N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- flow-cytometry
- CPT
- 84484
- SNOMED
- 302774002
- 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
What is this test?
This test looks for IgM antibodies directed against atorvastatin that can neutralize the drug. The result is reported qualitatively as detected or not detected.
Why might I need this test?
This specialized test may be ordered when an unusual immune-mediated reaction to atorvastatin or an unexpected response to treatment is suspected. It is different from routine tests that measure cholesterol, liver enzymes, muscle injury, or atorvastatin drug levels.
How is the test performed?
A blood sample is collected, and the serum or plasma is examined in the laboratory for evidence of atorvastatin-specific neutralizing IgM antibodies. The final report indicates whether the antibodies were detected.
How do I prepare for the test?
Fasting is usually not required, but tell the healthcare professional which medicines and supplements you take. Do not stop atorvastatin or any other prescribed medicine unless your clinician instructs you to do so.
Reference range
Adult: 10-40 U/LN/A
No special preparation required. Avoid fatty meals before the test if possible.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
A detected result means the blood contains atorvastatin-specific IgM antibodies capable of neutralizing the drug. Depending on the clinical situation, this may support evaluation of an immune-mediated adverse reaction or an unusual response to atorvastatin. A negative result does not completely exclude an atorvastatin-related reaction, so results must be interpreted with symptoms, medication history, and other tests.
Short name
Atorvastatin neutralizing IgM antibodies
Frequently asked questions
What does a positive result mean?
Is this the same as an atorvastatin blood level or cholesterol test?
Should I stop taking atorvastatin because of this test?
Sources
- 1
- 2Lab Tests OnlineSource
- 3
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.
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