Taking the Azithromycin 3 times a week is a prophylactic treatment for chronic Pseudomonas. For me it had an anti inflammatory effect and made the mucus very easy to expel. BUT after only taking it for one day i had heart symptoms. So i never took it again. I do not see how people can tolerate it ongoing but some people do just fine on it. I have read that you should NOT take it alone if you have MAC .