A patient presenting with anaphylaxis after exposure to a bee sting. What is the first-line management?

• A. Intravenous fluids only
• B. Antihistamines alone
• C. Corticosteroids only
• D. Immediate intramuscular epinephrine and airway support as needed; monitor and treat with adjunctive therapies

Answer: (D)

Anaphylaxis is a medical emergency where rapid reversal of airway, breathing, and circulation problems is vital. The primary treatment is prompt administration of epinephrine, given by intramuscular injection into the mid-outer thigh, with airway support ready if needed. Epinephrine works quickly by constricting swollen blood vessels to reduce airway edema and hypotension, and by relaxing bronchial smooth muscle to relieve bronchospasm, while also improving cardiac output. Because time matters, administer it as soon as anaphylaxis is suspected and provide ongoing monitoring and support.

After epinephrine, airway management and supportive measures (such as oxygen and IV access for fluids) should be continued. Adjunct therapies like antihistamines and corticosteroids play a role in symptom control or prevention of biphasic reactions but do not address the life-threatening aspects fast enough to be the sole treatment. Antihistamines help with itching and hives; corticosteroids have a delayed onset and limited immediate effect. IV fluids are important for hypotension but do not reverse airway compromise as rapidly as epinephrine, so they are supportive rather than the primary treatment.