I am 63 and have severe COPD from smoking since I was about 16. I've had chronic bronchitis for a number of years and recently found some articles on using N-Acetyl Cysteine (NAC) for clearing phlem, so I bought some from a local health food store. I've been taking 1200mg/day and am amazed at the results - after just one day I was coughing up a lot, but the phlem was foamy rather than thick and sticky. It's been over a week now that I've been taking the NAC and my coughing has lessened significantly. I am now also taking serrapeptase and niacin.
I was recently given a nebulizer machine by someone who's friend passed away from his COPD (he was 81 and had three nasty bouts of pneumonia) and have ordered some hoses/mouthpieces and some liquid DMSO, MSM and colloidal silver to try Ted's DMSO treatments to further help clear my lungs. I'll post an update after a few weeks.