Which medication is specifically used to treat severe allergic reactions and anaphylaxis in EMS?

Which medication is specifically used to treat severe allergic reactions and anaphylaxis in EMS?

• A. Diphenhydramine
• B. Nitroglycerin
• C. Epinephrine
• D. Albuterol

Answer: (C)

In severe allergic reactions and anaphylaxis, the immediate priority is to reverse airway swelling, relieve bronchospasm, and support blood pressure. Epinephrine does all of this at once because it acts on multiple receptor systems: alpha-1 effects cause vasoconstriction to reduce swelling and raise blood pressure, beta-1 effects increase heart rate and contractility to improve circulation, and beta-2 effects dilate the airways and help limit further mediator release from mast cells. This rapid, multi-faceted action makes it the most effective initial treatment in EMS for anaphylaxis. Other drugs have useful roles in specific aspects—antihistamines can help with itching and hives but don’t reverse airway obstruction or hypotension quickly; nitroglycerin can lower blood pressure and is not appropriate in this context; albuterol may help with bronchospasm but doesn’t address the life-threatening circulatory component. Epinephrine is the cornerstone because it tackles the critical problems driving the emergency in a single, fast-acting dose.

In severe allergic reactions and anaphylaxis, the immediate priority is to reverse airway swelling, relieve bronchospasm, and support blood pressure. Epinephrine does all of this at once because it acts on multiple receptor systems: alpha-1 effects cause vasoconstriction to reduce swelling and raise blood pressure, beta-1 effects increase heart rate and contractility to improve circulation, and beta-2 effects dilate the airways and help limit further mediator release from mast cells. This rapid, multi-faceted action makes it the most effective initial treatment in EMS for anaphylaxis. Other drugs have useful roles in specific aspects—antihistamines can help with itching and hives but don’t reverse airway obstruction or hypotension quickly; nitroglycerin can lower blood pressure and is not appropriate in this context; albuterol may help with bronchospasm but doesn’t address the life-threatening circulatory component. Epinephrine is the cornerstone because it tackles the critical problems driving the emergency in a single, fast-acting dose.