Hi Ricanbabe,
Thanks for posting your question. While we cannot give medical advice via the internet (for your husband's safety) we do hear you on your concern. We encourage you to ask the prescribing doctor this good question, if you haven't already. If for some reason you do not feel comfortable with the answer provided by this doctor, please know that many in the community find it helpful to get a second opinion. Additionally, here is our COPD treatment page, which you might find interesting based on your question: https://copd.net/treatment . I hope this helps!
Best,
Jenn (Team Member)