I keep seeing the excessive mucus /saliva / sputum causing choking symptom on this site. I hope what worked for my dad might work for someone else. My dad had this problem a couple of years ago and the doctor had x-rays taken a couple of times thinking it might be pneumonia which it wasn't. I was just giving my dad Muscinex to loosen the phlegm, but it didn't do much good. Then I saw a post on a Parkinson's website that an antacid had cured someone of the problem so I gave it a shot. It really worked for my dad! Since then I have given my dad Ranitidine (Zantac) 150 mg twice a day and he no longer gets the thick strings of mucus he used to choke on. Between the antacid and his albuterol for wheezing, the choking is totally under control for now. The doctor says the antacid keeps the stomach from producing so much mucus. Hope this helps someone.
As my dad and his friends used to say, stay vertical and keep taking nourishment!