I wish someone other than I had responded to your question because I, too am looking for a solution to excessive phlegm. My husband does not have a PEG, indeed refuses to have a PEG but the excess phlegm prevents him from being able to eat or drink. He has an IV every evening for hydration. In his nursing home where he is staying during radiation he has a machine that sucks the mouth phlegm out, but it doesn't reach the throat phlegm. He has swabs he can dip into a liquid and run around the inside of his mouth and he has two kinds of prescription and he has Biotene from Wal-Mart. But right now, with 5 radiation treatments to go, phlegm is is biggest problem.