Skin prick tests are immediate, cheaper, and slightly more sensitive. Blood tests (specific IgE) are excellent when skin testing is impossible, such as when a patient is taking antihistamines or has severe, widespread eczema. Dr. Shukla will recommend the most appropriate option for you.
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Diagnostic Test
Allergy Blood Test
A simple blood draw to measure specific IgE levels, suitable when skin tests aren't possible.
Duration:Blood draw
Overview
An Allergy Blood Test measures the concentration of allergen-specific IgE antibodies in your blood. Unlike skin tests, blood testing (specifically using the gold-standard ImmunoCAP platform) does not require pricking the skin and is not affected by medications. It is a vital tool for patients who cannot undergo skin prick testing.
How It Works
- Blood Draw: A standard, quick blood sample is collected from a vein.
- Laboratory Analysis: The sample is analyzed using quantitative specific IgE assays (such as ImmunoCAP).
- Component Diagnostics: Evaluating specific molecular components of allergens to predict reaction severity and cross-reactivity.
What to Expect
- A simple blood draw that takes less than 5 minutes.
- No need to stop antihistamines or allergy medications before the test.
- Results returned from the laboratory within a few days.
Who Is It For?
- Patients with severe eczema or skin conditions where skin prick testing is not feasible.
- Individuals who cannot stop taking daily antihistamines.
- Uncooperative young children or infants.
- Patients with a history of life-threatening anaphylaxis where skin tests pose a slight risk.
Frequently Asked Questions
No. You do not need to fast. You can eat, drink, and take your regular medications (including antihistamines and nasal sprays) before the test.
Take the next step
Interested in booking a allergy blood test? Consult our specialists.
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