It is amazing the different ways patients are advised and what they take and don't take. I also take NAC 600 mg twice a day. Can't pinpoint if it makes any difference because I do so much other stuff. I was hospitalized eight days for COVID and because my cough was so bad they gave me Mucinex which helped settle it down. My post-hospital pulm doc visit said he did not recommend taking Mucinex regularly because it might suppress the cough when you actually need to cough to expel sputum. I neb twice daily with 3.5% sodium chloride and am inhaling Tobramycin (2 weeks on and 2 weeks off). Have had pseudomonous A. return over and over for more than four years. It's a battle and we just need to find our best weapons. Best to everyone.