I have Bronchiectasis in my lungs. i use serrapeptase enzymes to clear mucus in my lungs. i don't cough it up at all. it breaks it down and the body clears away in a few weeks. please google Serrapeptase enzyme and read about. as it also can prevent the blood from clotting which is not good before surgery. also if you cut yourself, you need to clot. I take a lower dose. initially I took a larger dose and it worked VERY VERY well at reducing mucus in my lungs. as soon as I felt better, I lowered the dose and now I am maintaining very well.