What should I know about was tun bei allergischer reaktion?

The question about what to do in case of an allergic reaction is medically important, but the provided context documents do not contain specific information on this topic. They cover hormone and vital checks for men, polygenic score ancestry portability, and a gene (ACOX2) related to intolerances—not acute allergies. Therefore, I can only provide a general, evidence-based answer: In an allergic reaction (e.g., hives, swelling, difficulty breathing), the first step is to avoid the trigger. For mild symptoms, antihistamines (e.g., cetirizine, loratadine) may help. For severe reactions (anaphylaxis), immediate emergency call (911/112) and epinephrine (auto-injector) are required. A physician should be consulted for diagnosis and possible allergy testing (skin prick test, IgE measurement). The evidence for this is established clinical practice. The provided context does not directly support this recommendation.