Can anyone shed light on this for me?

Medical Advice

It is not our intention to serve as a substitute for medical advice and any content posted should not be used for medical advice, diagnosis or treatment. We make every effort to support our members, our medical professionals cannot and will not provide a diagnosis or suggest a specific medication; those decisions should be left to your personal medical team. While we encourage individuals to share their personal experiences with COPD, please consult a physician before making changes to your own COPD management plan.