A 60-year-old man comes to your office because of a persistent cough that has been bothering him for the past 3 months. His cough is dry and is more frequent during the evenings. He also notes frequent nasal congestion, especially when he is exposed to dust and cold weather. He reports no hemoptysis, weight loss, wheezing, fever, or changes in his appetite. He reports he is taking medication for his cholesterol as well as his blood pressure but he cannot remember the name of the medications.