A nurse is caring for Joseph, a patient who developed mucosal swelling, urticaria, and swollen face and eyes after starting amoxicillin. His respiratory rate is 24/min, heart rate is 110/min, and lungs are clear but breathing is labored. What nursing action should have the highest priority?

Obtain a complete allergy history and monitor vital signs every 30 minutes.

Apply a cool compress to swollen areas to reduce edema and provide comfort.

Administer epinephrine immediately and prepare for possible airway management.

Administer oral antihistamines to relieve urticaria and monitor for progression.