question: I am on bi-pap 18/14 with a ramp setting of 5 for 45 minutes, I have the humidifier at the lowest setting, over the past 6 weeks I have been on steroids and 3 different antibiotics. When I use the bi-pap after 2 hours start coughing, sort of a barking sound that won t stop until I turn off the bi-pap machine. I am concerned witChatDoctorpliance issues, I have contacted the hotline for bi-pap and my pulmonary doctor with no answers. I tried the machine again around 11 p.m. and to turn it off, I had not used the machine for the past 3 days and had no coughing attacks. I have COPD, I also use Flonase with no relief please any suggestions