Which option best describes signs of an allergic reaction and the recommended initial treatment if airway involvement is present?

• A. No airway symptoms; treat with antihistamines only
• B. Mild symptoms; observe
• C. Signs include increased respiration, increased heart rate, low blood pressure; epinephrine first if airway involvement
• D. Cough and sneezing only

Answer: (C)

The key idea is recognizing anaphylaxis with airway involvement and acting quickly with the treatment that can reverse life-threatening airway and circulatory symptoms. When the airway is affected, you’re dealing with swelling of airway tissues and bronchospasm that can rapidly worsen. Signs like faster breathing, a fast heart rate, and falling blood pressure point to this more serious reaction rather than a mild allergic reaction. In this situation the first and most critical intervention is epinephrine given promptly, because it acts on multiple fronts: it constricts swollen blood vessels to reduce airway edema, relaxes airway smooth muscle to relieve bronchospasm, and supports heart rate and blood pressure. This combination helps stabilize the patient and buys time for transport and further care.

Antihistamines or observing alone are not adequate when there is airway involvement, since they don’t reliably reverse airway obstruction or shock. Cough and sneezing can occur with simple allergic symptoms but do not reflect the potential severity of anaphylaxis. So the best choice is the one that acknowledges airway involvement and prioritizes epinephrine as the initial treatment to halt progression and protect breathing and perfusion.