AKT-5681

A 63-year-old man with newly diagnosed chronic obstructive pulmonary disease (COPD) comes in for a follow-up appointment. His FEV1 is 60% of the predicted value. He has successfully quit smoking and has been using a salbutamol inhaler as needed. However, he still experiences wheezing and difficulty breathing. There is no indication of asthma, eosinophilia, or FEV1 fluctuations.

What would be the best course of action at this point?