Side effects of Arikayce

I've been taking the "3" antibiotics, Azithromycin, Rifampin and Ethambutol for about six weeks now with few side effects. Now I'm supposed to begin Arikayce via an inhaler, but when I read that a serious and common side effect is the worsening of COPD I was stunned. I was hospitalized twice last summer with COPD exacerbations. It's in my medical records both at National Jewish
and Beth Israel yet both Infectious Disease doctors okayed this drug for my use. I wonder what others have experienced with this drug.