A 7-Year-Old Boy Is Brought to the Emergency Department by His

A 7-year-old boy is brought to the emergency department by his mother because of difficulty breathing for 20 minutes. He was having lunch with his mother when she noticed a rash and swelling of his tongue and lips. Two years ago, he was diagnosed with asthma. His mother has had atopic dermatitis since she was 12 years old. The patient's only medications are inhaled beclomethasone and inhaled albuterol. His temperature is 37°C (98.6°F) , pulse is 169/min, respirations are 28/min, and blood pressure is 90/50 mmHg. Pulse oximetry on room air shows an oxygen saturation of 92%. Examination shows generalized hives, swelling of his tongue and lips, and labored breathing with intercostal retractions.Which of the following drugs should be administered next to this patient?

A) Corticosteroids
B) Epinephrine
C) Norepinephrine
D) Dobutamine
E) Diphenhydramine