You are called to the emergency room to treat an 18-year-old…

You are called to the emergency room to treat an 18-year-old female who has been admitted in an acute asthma attack. She received two albuterol treatments prior to entering the emergency room. The patient’s breath sounds reveal wheezes bilaterally, and she is unable to perform a PEFR. The physician asks you to recommend treatment. Which of the following would you suggest?