@garry When I was taking the antibiotics, it was azithromycin, rifampin & ethambutol. At first it was 3X/wk, but my lungs actually continued to get worse (though my cough improved) and the ID doc increased it to daily for 6 months. Lungs cleared of MAC spots and I am now on a daily maintenance regimen of 7% saline nebs with airway clearance device (Aerobika) plus the asthma meds montelukast (singulair) and Flovent. We shall see in April if it is working. Sue