An 8-year-old child with a history of asthma presents to the emergency department with acute onset wheezing, tachypnea, and accessory muscle use, despite using their home albuterol inhaler several times. Their peak expiratory flow (PEF) is 60% of their personal best. What is the most appropriate initial pharmacologic intervention in the emergency department?

The correct answer to the question "An 8-year-old child with a history of asthma presents to the emergency department with acute onset wheezing, tachypnea, and accessory muscle use, despite using their home albuterol inhaler several times. Their peak expiratory flow (PEF) is 60% of their personal best. What is the most appropriate initial pharmacologic intervention in the emergency department?" is Option B: Continuous inhaled albuterol.

The other options — A) Oral prednisone, C) Intravenous magnesium sulfate, D) Inhaled ipratropium bromide — are incorrect for this USMLE Exam Prep question. As explained above: For moderate to severe asthma exacerbations unresponsive to initial home therapy, continuous inhaled albuterol is the most appropriate initial treatment to achieve rapid bronchodilation. Systemic cor…