wie lange kein cetirizin vor allergietest — when to see a doctor?

Cetirizine is an antihistamine that blocks histamine release and can interfere with skin prick tests. The recommended washout period before allergy testing is typically 3 to 7 days, depending on dosage and individual half-life (about 8–9 hours). For long-term use or depot formulations, up to 14 days may be required – always follow your doctor's instructions. For blood tests (specific IgE), stopping is unnecessary because antihistamines do not affect antibody levels. You should see a doctor if allergy symptoms are severe (e.g., difficulty breathing, anaphylaxis), if you are unsure about pausing medication, or if test results need professional interpretation. MyBody-X does not offer allergy tests; this advice is based on clinical practice (EAACI guidelines).