A nine-year-old child is brought to the emergency room by his parents, who report that after playing outside, he complained of a stomachache and then developed facial swelling, hives, and started having trouble breathing. On exam, he has moderate angioedema to the face, wheezing, and tachycardia. What is the first medication that the nurse expects to administer?
1. Albuterol via nebulizer
2. Epinephrine
3. Diphenhydramine
4. Oral corticosteroids
