Saliva substitutes for dry mouth after radiation

This page is for people with dry mouth after head and neck radiation. It covers whether saliva comes back, saliva substitute products, and how to protect your teeth.

People finishing head and neck radiation usually want to know one thing. Does saliva come back? It is a fair question to ask early, and NCI's answer is careful, not comforting.

Salivary glands may not fully recover after radiation therapy ends. Glands may partly recover during the first year after treatment, but recovery is usually not complete.

How much function comes back depends on the radiation dose and how many glands were directly exposed to it. That is why two people who had radiation to the same area can end up in very different places.

NCI notes a contrast with dry mouth caused by chemotherapy for a stem cell transplant, which is usually temporary: those salivary glands often recover two to three months after the chemotherapy ends. Radiation works differently.

It helps more to plan for a lasting change than to wait for a recovery that may never fully arrive.

Dry mouth often gets treated as just an inconvenience. It is more than that, because saliva protects your teeth and tissue all day long.

NCI advises sipping water often to relieve dryness. MedlinePlus says dry mouth raises the risk of tooth decay, which is why dental follow-up matters so much after head and neck radiation.

NCI describes two different approaches, and they are not the same thing.

Saliva substitutes stand in for the real thing. They are used in place of natural saliva. NCI and MedlinePlus list them as a dry mouth treatment.

Medicines that stimulate the glands work the other way. They prompt whatever gland tissue is left to make more saliva. NCI notes that dentists may provide saliva substitutes or medicines that help the glands produce more.

Which one fits you depends on how much working gland tissue you still have. That is a question for the team who treated you.

NCI's dental advice here goes further than ordinary dental care.

• Brush and floss regularly, and see your dentist
• Use fluoride as your dental team directs
• Rinse with a mix of salt and baking soda, as NCI describes
• Avoid foods and drinks with a lot of sugar
• Sip water often to ease dryness

NCI says a dentist may also give rinses that replace minerals in the teeth and rinses that fight infection in the mouth.

Avoiding sugary foods matters even more here. A dry mouth makes sweet things tempting, and the usual protection from saliva is no longer there.

These ideas for handling dryness through the day are simple, and you can combine several at once.

• Keep water within reach and sip often
• Chew sugarless gum or suck sugarless hard candy (MedlinePlus, NIDCR)
• Ask your team about lip care products

NCI says acupuncture may also help relieve dry mouth.

Choose sugarless over sugary. With less saliva, sugary candy sitting in the mouth raises the risk of tooth decay.

If saliva does not fully come back, managing it does not stop. It just becomes routine: water always nearby, dental checks kept up, fluoride used as directed, and food chosen partly for how easy it is to swallow.

NCI's guidance also covers swallowing trouble, and suggests serving food chopped, ground, or blended so it spends less time in the mouth. Many people with lasting dry mouth find that advice fits them too.

The single most useful step is making sure your dentist knows exactly what radiation you had and where. NCI says dentists may give mineral-replacing rinses and may provide saliva substitutes or medicines that help the glands make saliva.

A dentist who does not know your history will treat you like anyone with an ordinary dry mouth. Your teeth need closer attention than that.

• NCI: Oral Complications of Chemotherapy and Head/Neck Radiation (PDQ)
• MedlinePlus: Dry Mouth
• NIDCR: Dry Mouth