No. 1 Dentist recommended dry mouth brand. Soothing. Moisturization. Long lasting relief. Locks in moisture. Dry Mouth could be caused by: Medications. Diabetes. Head and Neck Cancer Radiation Therapy. Sjogren's Syndrome. Contains a mouth moisturizing system Symptom relief for up to 4 hours (As measured in a 28 day clinical study). Helps soothe oral tissues. Helps maintain a healthy oral environment. Questions or comments? 1-800-922-5886. Also look for other biotene products including: biotene Fluoride Toothpaste, biotene Mouth Spray, and biotene Oral Rinse.