A 9-year-old boy is agitated and leaning forward on the bed in obvious respiratory distress. The patient is speaking in short phrases and tells you that he has asthma but does not carry an inhaler. He has nasal flaring, severe suprasternal and intercostal retractions, and decreased air movement with prolonged expiratory time and wheezing. You administer 100% oxygen by a nonrebreathing mask. His POx is 92%. Which medication do you prepare to give to this patient?
A) Albuterol
B) Adenosine
C) Amiodarone
D) Procainamide