What should I know about allergietest antihistaminika vorbereitung?

The question about allergy test preparation regarding antihistamines is not directly addressed in the provided knowledge sources. In general medical practice, antihistamines can suppress skin reactions in prick or intradermal tests, so they should be discontinued before testing. The required washout period depends on the specific antihistamine: short-acting ones typically need 3–5 days, while long-acting ones (e.g., cetirizine, loratadine) may require 7–10 days. Some antidepressants and stomach medications can also interfere. This advice is based on clinical guidelines and practice, not on the MyBody-X documents provided. Therefore, the evidence level is 'practice'. Always consult your doctor or the testing laboratory for personalized instructions, as individual conditions (e.g., asthma, skin diseases) may alter preparation. The context snippets (e.g., MTHFR, microbiome) are not applicable to this specific query.