Serum IgE testing is a form of allergy testing that requires a blood draw. IgE is an antibody that your body’s immune system makes to allergens.
Serum IgE testing is used to evaluate for environmental allergies and food allergies . Antihistamines do not interfere with blood testing.
Your test results are best explained by an allergist, because an abnormal IgE level does not always indicate you have an allergy.