Immunoassay for Anti-Drug Antibodies (e.g., for Drug Resistance or Allergy Monitoring)
This test checks for antibodies your body may produce in response to certain medications, which could affect how well they work or cause allergic reactions.
["Helps determine if medications may not work as expected or if side effects like allergies are due to your immune response."]
Key facts at a glance
- LOINC
- 17723-8
- Short code
- T palldm Ab Ser Ql Immob
- Synonyms
- T palldm Ab Ser Ql Immob
- Category
- chemistry
- Sample
- serum
- Container
- Red-top tube (SST)
- Units
- N/A
- Fasting
- false
- Population
- adult
- Sex
- all
- Age range
- 18–65 years
- Method
- immobilization
- 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 Might Be Ordered
Your healthcare provider may recommend this test if you’re taking medications that can sometimes trigger an immune response, such as certain chemotherapy drugs, biologics, or other targeted therapies. It’s also used to monitor for drug resistance in conditions like cancer or autoimmune diseases.
How the Test Works
A small blood sample is taken to detect specific antibodies against the medication. The test uses an immunoassay method to measure these antibodies in your serum or plasma.
What to Expect Before the Test
No special preparation is usually needed, but you may be asked to avoid certain medications or foods for a short time if instructed by your provider. Bring a list of all medications you’re taking to your appointment.
What the Results Mean
Results can be positive (meaning antibodies were detected) or negative (meaning no antibodies were found). Positive results may indicate an allergic reaction risk or reduced medication effectiveness, but results should always be interpreted by your healthcare provider.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
Short name
Anti-drug antibody test
Frequently asked questions
If antibodies are found, it may mean your body is reacting to the medication, which could affect treatment plans. This can help doctors adjust your therapy to improve effectiveness or reduce side effects.
Negative results mean no antibodies were detected, but this doesn’t guarantee the medication will work perfectly—other factors may still influence its effectiveness.
How often will I need 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 16, 2026. · Read our editorial policy