How do saliva substitutes work for dry mouth (xerostomia)?

Saliva substitutes are products designed to moisten the mouth. They may come as sprays, gels, or rinses. Unlike medicines that stimulate saliva glands, these products mainly provide moisture and lubrication. They do not fully replace all the protective roles of natural saliva.

Some people use a spray during the day or a gel at bedtime for temporary comfort. Results vary. Follow the product label for how much to use and how often. Check whether a rinse should be spit out. Ask a pharmacist or dentist if you have trouble understanding the directions or choosing between products.

Look for products made for dry mouth rather than using a regular mouthwash as a substitute. Sugar-free, nonacidic options are generally better for teeth. Tell your clinician about ingredient allergies or irritation after use. Even if a product makes your mouth feel better, you still need regular dental care and fluoride toothpaste. Saliva substitutes do not address causes such as a medicine side effect, dehydration, or an immune system condition.