Can a bipap cause pneumonitis?

Haven't heard of it: Anything is possible so it's best to check with the pulmonary or sleep medicine doctor who started the bipap. Bipap can cause stomach bloating, so if one were to reflux acidic fluid more easily, he could get chemical pneumonitis if small amounts of the fluid got into the lungs. Maybe the outward flow of lung mucus is altered, which might decrease his ability to prevent viral/bacterial pneumonitis.

No: Bipap is used every day by millions of people safely without any increased risk of pneumonia.