CCRN Critical Care Nursing

Answer: B - The most urgent action is to maintain an airway, particularly with visible oral swelling, followed by the administration of epinephrine by subcutaneous injection. The patient may be experiencing an anaphylactic reaction. The physician will see the patient as soon as possible with the above actions underway. Oral diphenhydramine is indicated for mild allergic reactions and is not appropriate for anaphylaxis.