Allergy Blood Tests & Challenge Tests
Challenge Tests
A very minute quantity of an allergen is inhaled or taken by mouth. Challenges are done mostly with potential food or medication allergies. It is of utmost importance that they should be supervised by a physician with specialized training and experience,such as an allergist.
Blood Tests
This test involves drawing blood, so results aren't available as easily and fast as with skin tests. Blood tests are generally used when skin tests are unsafe or won't work, such as in infants, if you are taking certain antiallergy medications, or have an active skin condition that may interfere with skin testing.