Debbi,
Fran is absolutely right.
COPD (chronic obstructive pulmonary disease) is divided into emphysema, chronic bronchitis and asthma. Which do you have? Emphysema is not reversible, although its progression can certainly be retarded. Most frequently this is due to smoking.
Regarding prescription medication, I'd say whatever works. But if I can get by without, then all the better. There are so many cross reactions and conflicting physiologic changes that I'd rather keep the table clear for something only a med can help.
Just be sure to work with your local MD.
PC