Q. A 35-year-old man presents to the clinic with a chronic, dry cough for more than a month. He says that the cough is more severe at night and disturbs his sleep. He does not have wheezing, shortness of breath, or weight loss. He mentions occasional heartburn. He is a non-smoker. His vitals are normal and the physical examination is unremarkable. His body mass index (BMI) is 30 kg/m2. His forced expiratory volume in 1 second (FEV1) is >100%. What is the most appropriate next step in his management?