Review Question - QID 212633

A 55-year-old woman presents to her primary care physician for a worsening cough. She states that she has had a cough for 5 months. Over the past 2 weeks, the cough has become more frequent and produces yellow sputum. She has dyspnea on exertion at baseline, which she feels is also worsening. She denies fever, hemoptysis, or chest pain. She has chronic obstructive pulmonary disease and mild osteoarthritis. She uses inhaled ipratropium and takes ibuprofen as needed. She received the influenza vaccine 2 months ago. She smokes a half pack a day, and denies alcohol or recreational drug use. In addition to broad-spectrum antibiotics, which of the following is indicated?