mrcem2-1850

mrcem2-1850

A 40-year-old man presents with a sudden worsening of his asthma symptoms. His heart rate is 110 bpm, respiratory rate 30/min, and his oxygen saturations are 88% on room air. He is feeling fatigued, and his breathing sounds weak, with no audible sounds in his chest. He has already received two consecutive nebulizers of salbutamol, 40 mg, one nebulizer of ipratropium bromide, and 40 mg of prednisolone orally. The ICU outreach team has been notified and will arrive soon.
Which of the following medications would be most appropriate to administer while waiting for the ICU outreach team to arrive?