In the emergency setting, how is anaphylaxis managed?

• A. Immediate epinephrine (IM), call for help, secure airway, high-flow oxygen, IV fluids, antihistamines and corticosteroids as adjuncts; monitor vital signs.
• B. Start IV diuretics and observe.
• C. Place patient supine and wait for symptoms to subside.
• D. Administer broad-spectrum antibiotics.

Answer: (A)

Anaphylaxis in the emergency setting is a life-threatening reaction that can progress quickly, so rapid, decisive treatment is essential. The first and most crucial step is immediate intramuscular epinephrine because it rapidly constricts blood vessels to raise blood pressure, reduces airway swelling, and opens the airways. This effect addresses the major threats of airway obstruction and shock right away. After giving epinephrine, call for help and activate emergency response so advanced care can be on the scene quickly.

At the same time, securing the airway and providing high-flow oxygen are key to ensuring adequate breathing and oxygen delivery as the reaction can worsen airway swelling and bronchospasm. Establishing intravenous access and giving IV fluids helps counteract the distributive shock from the reaction and supports circulation.

Antihistamines and corticosteroids are helpful as adjuncts. They can help with rash and itching and may reduce the risk of a biphasic reaction, but they do not reverse the life-threatening airway or circulatory problems as promptly as epinephrine. Continuous monitoring of vital signs is essential to track response and guide any need for additional epinephrine doses or further interventions.