We suggest that you try the following solutions: Humidifier. Using a PAP therapy device or other sleep apnoea therapy device can sometimes lead to drying and congestion of the throat, nose, and mouth. This is because the airflow generated by the machine is often greater than your patient’s body is accustomed to humidifying on its own. Humidifiers and heated tubes can increase the amount of humidity in the air your patient breathes in, which can help to reduce these symptoms and make therapy more comfortable. Nasal decongestant. Nasal allergies and congestion can result in patients breathing through their mouth during the night. This dries the throat and mouth and can negatively affect their sleep apnoea therapy. A nasal decongestant or antihistamine could help to alleviate this issue. Chinstrap. If your patient has a dry nose and mouth during sleep apnoea treatment, it might be because of an open mouth during sleep. A chinstrap could resolve this issue by keeping your patient’s mouth closed throughout the night. Full face mask. Chronic nasal allergies or other nasal problems such as a deviated septum can make it difficult to breathe through the nose. Full face masks, which ensure your patients receive their treatment whether they breathe through their nose or mouth, could be the answer.