@skylark1 The thinking by the docs is that GERD may be a contributing factor to bronchiectasis - the long-term entrance of the acid into the lungs can cause damage. So the advice is to treat the GERD to prevent further damage. I am not a doctor, so I cannot tell you what is the best approach for you. In my case, I don't seem to have it, and have only taken acid-reducing meds briefly to control acid when the antibiotics for MAC were causing a great deal of stomach distress. My primary physician was trying everything to heal my stomach where 18 months of meds had irritated it to the point of constant pain.