@hydrang3a Hi. I never did the Big 3 antibiotics. In 2013, I went on cipro and doxycycline for 10 days a month on alternating months. My mac tested neg after one year on it. I stayed on that regimen as a preventative measure for three yrs. I then caught pseudomonas in 2016 and got that treated w/tobramycin. That knocked it out after 30 days, plus, as a bonus knocked out the constant cough I had foe 10 yrs. I have been on the toby and cipro on alternating months ever since. I still test neg for mac and pseudo. That doesn't mean that I am cured, it just means there is no detectable amount. Though infection free: I still have bad fatigue that is due to having bronchiectasis.