BioXtra Dry Mouth Oral Gel 40ml BioXtra Dry Mouth Oral Gel 40ml BioXtra Dry Mouth Oral Gel 40ml is a long-lasting moisturising oral gel designed to help relieve the discomfort of dry mouth. Its gentle formula helps lubricate the mouth, soothe dry gums and tongue, and provide lasting comfort, especially at night or whenever the mouth feels dry. Suitable for people experiencing symptoms of xerostomia, this oral gel helps support oral comfort by acting as a saliva substitute. It can also be applied under dentures for added moisture and lubrication.