You are outside at a picnic when a person shouts, "Do we have a doctor here?" You rush over to see a young man with visible dyspnea. He is using his accessory muscles and audibly wheezing. You notice the rash shown below. The person also has periorbital edema and conjunctival swelling. A bystander says that the person is otherwise healthy and has no past medical history and takes no medications.
Challenge: What is your next step in management?
Image is in the public domain.