What is one key symptom of anaphylaxis that EMS should be aware of?

Severe wheezing or difficulty breathing is a key symptom of anaphylaxis that EMS should be acutely aware of because it results from the acute airway constriction and acute bronchospasm caused by the body's severe allergic reaction. Anaphylaxis triggers the release of histamine and other mediators that lead to airway swelling and smooth muscle contraction, directly impacting the respiratory system. This symptom is critical because respiratory distress can escalate quickly and may become life-threatening if not addressed promptly.

While elevated blood sugar, headache, and nausea may occur in various conditions, they are not hallmark symptoms of anaphylaxis. In contrast, respiratory difficulties are evident signs of the systemic effects of anaphylaxis, necessitating immediate medical intervention to ensure the airway remains patent and to provide oxygen support as needed. Recognizing and responding to difficulty breathing is vital for the effective management of a patient experiencing an anaphylactic reaction.