system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 30-year-old woman presents to an urgent care center with progressively worsening cough and difficulty breathing. She has had similar prior episodes since childhood, one of which required intubation with mechanical ventilation. On physical exam, she appears anxious and diaphoretic, with diffuse wheezes and diminished breath sounds bilaterally. First-line treatment for this patient’s symptoms acts by which of the following mechanisms of action?
assistant
Beta-2 agonist