Do you have An autoimmune diagnosis? You need to find the cause of the dry mouth. Meanwhile, keep hydrated and use biotene products: toothpaste, Dry mouth Spray. And mouthwash. They are highly recommended and help me. Many autoimmune illnesses have dry mouth as a symptom. I have mixed connective tissue disease . Plaquinil (hydroxychloroquine) has really helped the dry mouth. It's important for you to find out the cause and treat the symptoms. Dry mouth neglected can really screw up your teeth and gums .