wie lange vor allergietest keine antihistaminika — what can you do yourself?

How long to stop antihistamines before an allergy test depends on the test type. For skin prick tests, antihistamines can suppress the wheal reaction and should be discontinued 3–7 days beforehand (e.g., cetirizine 3 days, loratadine 7 days). For a blood IgE test (like the MyBody-X AllergieCheck), antihistamines do not interfere because the test measures antibodies in serum – you can continue taking them. What you can do yourself: Confirm with your doctor which test will be performed. If a skin test is planned, list your current medications and only stop antihistamines after medical advice. If you cannot pause them due to severe symptoms, ask if a blood test is an option. Important: Do not stop antihistamines on your own if you have a history of anaphylaxis or severe urticaria. The evidence is based on clinical practice guidelines, not on the provided context.