My husband had moderate to severe obstructive sleep apnea before being treated for oral cancer. After losing 50 lbs. from treatment and the issues that go along with the disease, he now has mild to moderate sleep apnea. He used a CPAP years ago but no longer does. What works for him is to sleep with his head elevated at a 45 degree angle. When he falls asleep flat on his back....YIKES!!! Choking, snorting, coughing! I have to wake him up, it is so unsettling to hear him struggle to breathe. He also has lots of excess mucus and always seems to have a bubbly wet throat. We even bought a dual adjustable bed so that he can sleep at the angle that works for him, and I can sleep flat. He gets a restful night's sleep and so do I!