--- title: "Dry mouth (xerostomia): causes, night dryness, relief" description: "Why your mouth stays dry, from medicines to Sjögren's, what the NIH says brings relief, and where the xylitol in tooth supplements fits." canonical: https://oralbench.com/dry-mouth alternate_html: https://oralbench.com/dry-mouth language: en-US last_updated: 2026-09-27 type: guia --- # Dry mouth: find the cause first, then the relief 1. [Home](https://oralbench.com/) 2. [Mouth & gums](https://oralbench.com/oral-health) 3. Dry mouth: find the cause first, then the relief A dry mouth now and then is normal, say when you're nervous. One that sticks around usually has a reason, and the reason decides what helps. By **OralBench editorial team**Updated September 27, 2026 ![Dry mouth: find the cause first, then the relief](https://oralbench.com/img/guia-dry-mouth-640.webp) Short answer Xerostomia is the technical term for dry mouth: not having enough saliva to keep your mouth wet. The NIH's dental institute (NIDCR) says it "is not a normal part of aging," and its dry mouth brochure counts "more than 400 medicines" that can make the salivary glands produce less saliva. For relief, it lists water, sugarless gum or hard candy, a humidifier at night and artificial saliva, while a dentist or doctor works out the cause. None of the supplements on this site is sold as artificial saliva, and the seven that contain xylitol don't say how much. ## What dries a mouth out ### Medicines "Hundreds of medicines can cause the salivary glands to make less saliva," says the NIDCR, and ones for high blood pressure, depression and bladder control "often cause dry mouth." Its caregiver sheet warns that "taking more than one of these can make dry mouth even worse." ### Health conditions "Sjögren's disease, HIV/AIDS, and diabetes can all cause dry mouth," says the NIDCR, and its dry mouth brochure adds Hepatitis C. In Sjögren's the main symptoms are a dry mouth and dry eyes, and "women are nine times more likely to have Sjögren's disease than men." ### Cancer care Radiation to the head and neck can damage the salivary glands, and chemotherapy can make saliva thicker, per the NIDCR. ### Everyday habits MedlinePlus lists breathing through your mouth and using alcohol or tobacco. The NIDCR adds caffeine, which "can dry out the mouth," and not drinking enough: "Older adults are more prone to dehydration than younger people." ### Age, but not really The NIDCR is firm that dry mouth "is not a part of the aging process itself." Older adults are simply more likely to take medicines that dry the mouth and to have conditions that do. ### Feeling dry with working glands Some people feel a dry mouth even when their salivary glands work correctly. The NIDCR says people with Alzheimer's disease or who have had a stroke "may not be able to feel wetness in their mouth." ## Why a dry mouth is a teeth problem too Saliva does more than keep things comfortable. The NIDCR says it washes food off your teeth and gums and "contains minerals such as calcium and phosphate that help keep teeth strong and fight tooth decay." Take it away and the balance tips. "Dry mouth also increases the risk for tooth decay or fungal infections in the mouth because saliva helps keep harmful germs in check," the NIDCR writes. Dentures suffer too: without enough saliva they can rub and cause sore spots. So the NIDCR's advice for people with dry mouth reads like a cavity-prevention plan: brush gently at least twice a day with a soft-bristled brush and fluoride toothpaste, floss, avoid sticky, sugary foods, see the dentist at least twice a year, and ask whether you need a prescription-strength fluoride gel or rinse. ## Remedies the NIH lists Most of these cost little or nothing. They ease the dryness; they don't replace finding out why it's happening. What to try What the source says Worth knowing Water, and lots of it NIDCR: "8 to 12 cups per day", plus sipping water or a sugarless drink with meals For Sjögren's, the NIDCR suggests a glass of water nearby "day and night" Sugarless gum or hard candy NIDCR: to "stimulate saliva flow"; "citrus, cinnamon, or mint-flavored candies are good choices" The NIDCR adds that some "contain xylitol and may help prevent cavities" A humidifier at night NIDCR and MedlinePlus The NIDCR notes that "saliva flow decreases during sleep" Artificial saliva The NIDCR: "sold in most drug stores/pharmacies" A dentist or doctor may suggest it, or a medicine that helps the glands work better A rinse made for dry mouth MedlinePlus: "a mouthwash made for dry mouth" The NIDCR's caregiver sheet says to pick a fluoride rinse "that does not contain alcohol" Less caffeine, alcohol and tobacco NIDCR: caffeine "can dry out the mouth"; tobacco and alcohol "dry out the mouth" Spicy or salty foods can also hurt a dry mouth (NIDCR) A change of medicine NIDCR: the doctor or dentist "may advise changing medications or adjusting the dosages" "Do not make any changes to your medications, though, without first talking to your physician." (NIDCR) From NIDCR, "Dry Mouth", "Dry Mouth: Questions and Answers", "Dry Mouth & Older Adults", "Older Adults and Oral Health", "Sjögren's Disease" and "The Tooth Decay Process", and the MedlinePlus health topic "Dry Mouth". All read on September 27, 2026. ## Where the supplements on this site fit Mostly, they don't. DentiCore comes closest on paper: one of its digital bonus guides promises to "get rid of canker sores, ulcers, dry mouth and candida". That promise sits in a free guide, not on the label, and nothing on the label is artificial saliva. Then there's xylitol. Seven of the 12 products list it among their ingredients (BioDentex, DentaSmile Pro, DentaTonic, DentiCore, OxyDental, Power Bite and Synadentix), and not one says how much. In the NIDCR's advice, it's the sugarless gum or candy that gets saliva flowing, and xylitol comes up for cavities. Our xylitol guide goes through what's known about it. Power Bite is sold as a candy with xylitol, which sounds like the NIDCR's suggestion until you look for the word sugarless: its page says nothing about sugar or any sweetener besides xylitol. That matters more than it sounds. The NIDCR's caregiver sheet says to "select sugarless cough drops, vitamins, and antacid tablets," so a candy you dissolve in your mouth every night that won't state its sugar content is a gap, not a detail. Synadentix and DentaTonic list lysozyme, lactoferrin and lactoperoxidase among eight enzymes and proteins in a 400 mg blend, with no amount for any of them, and their pitches are about other things ("repair teeth while you sleep" and a "Dental Filtration Breakthrough"). If a medicine is drying your mouth, no supplement changes that; the route the NIDCR describes goes through the prescriber. ## When dry mouth needs a doctor or dentist "If you think you have dry mouth, see your dentist or doctor to find out why your mouth is dry," the NIDCR advises. Its brochure adds that dry mouth "can also be a sign of certain diseases and conditions," which is the real reason not to just live with it. At the visit, MedlinePlus says, your provider or dentist "will review your medical history, examine your mouth, and ask about any medicines you take," and may suggest blood tests or a test that measures how much saliva you make. Bring the bottles of anything you take, supplements included. ## Frequently asked questions **What causes dry mouth?** The NIDCR lists side effects of some medicines, diseases such as Sjögren's, diabetes and HIV/AIDS, radiation or chemotherapy for cancer, and nerve damage from a head or neck injury. Its caregiver sheet adds dehydration. **Why is my mouth so dry at night?** Part of it is biology: "saliva flow decreases during sleep," the NIDCR notes. Breathing through your mouth is also on MedlinePlus's list of causes. The NIDCR suggests a humidifier at night, and for Sjögren's, a glass of water nearby "day and night". **What is the best remedy for dry mouth?** The one that fits the cause. For day-to-day relief the NIDCR lists water, sugarless gum or hard candy, less caffeine, no tobacco or alcohol, and a humidifier at night. If a medicine is the cause, your doctor or dentist may change the drug or the dose. **Do dry mouth lozenges help?** The NIDCR's version is sugarless hard candy, sucked "to stimulate saliva flow," and its caregiver sheet says to choose sugarless cough drops. None of the sources we read rates specific lozenge brands, so sugarless is the part to check on the pack. **Does xylitol help dry mouth?** The NIDCR mentions it because some sugarless gums and candies contain it, and says those "may help prevent cavities." The saliva comes from chewing gum or sucking on candy. The seven supplements on this site that list xylitol don't say how much is in them. **Is dry mouth a sign of diabetes?** It can be. The NIDDK lists "dry mouth, an important sign of diabetes" among the mouth problems diabetes can cause, and the NIDCR lists diabetes among the causes of dry mouth. A dry mouth that doesn't go away is worth raising with your doctor, who can check. ## Related pages Guides ### [Xylitol for teeth: seven products, zero amounts](https://oralbench.com/xylitol-for-teeth) Xylitol is a sugar alcohol used as a sweetener. Read more Mouth & gums ### [Tooth decay, from white spot to cavity](https://oralbench.com/tooth-decay) By the time there's a hole in your tooth, decay has been at work for a while. Read more Reviews ### [DentiCore review: a readable label with an odd sales pitch](https://oralbench.com/denticore) DentiCore isn't a probiotic. Read more Updated September 27, 2026. 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