wie lange kein cetirizin vor allergietest — can a microbiome test help?

For allergy skin prick testing, cetirizine should be stopped at least 3–5 days beforehand because it suppresses histamine-induced skin reactions. The exact washout period depends on the specific antihistamine and individual metabolism; longer use may require 5–7 days. A microbiome test cannot directly help with allergy diagnostics. Allergy tests rely on IgE antibodies or skin responses, whereas microbiome analysis characterizes gut or skin flora. While some evidence links gut dysbiosis to allergic conditions, a microbiome test does not replace standardized allergy testing. The evidence for microbiome testing in allergy management is primarily mechanistic and insufficient for clinical recommendations. Always consult your doctor about medication cessation before allergy testing and do not let microbiome results deter you from necessary diagnostic procedures.