wie lange kein cetirizin vor allergietest — what does this mean exactly?

The question asks how long to stop cetirizine before an allergy test (skin prick or intradermal). Cetirizine is a second-generation antihistamine that blocks histamine release and can suppress skin reactions to allergens. For reliable test results, a washout period of 3–7 days is generally recommended, with 5 days being a common safe standard. The exact duration depends on the drug's half-life (~8–10 hours) and dosage; longer use or higher doses may require a longer pause. Important: This is not medical advice. Consult your doctor before the test, as they will provide a personalized recommendation based on the specific medication and test method. Some allergists advise 7 days, others 3–5 days. The evidence is based on clinical practice and guidelines, not large randomized trials. Note: No sources were provided in the given context.