Dry mouth (xerostomia) happens when your mouth does not make enough saliva. In older adults, the most frequent cause is usually medication: drugs for blood pressure, depression, bladder control or allergies, among hundreds of others. Diabetes, Sjögren's disease, radiation treatment and mouth breathing can also cause it, and it is not a normal part of getting older.
If you wake up with your tongue stuck to the roof of your mouth, or bread is suddenly hard to swallow, you are not alone. There is a reason for it, and there is a lot you can do to feel better and protect your teeth.
Everyone gets a dry mouth now and then, for example when nervous. It becomes a problem when it happens all or most of the time, according to the National Institute of Dental and Craniofacial Research (NIDCR). Then chewing, swallowing and even talking can get harder.
Saliva does more work than most people realize. MedlinePlus explains that it:
With too little saliva, the risk of cavities and fungal (yeast) infections goes up (NIDCR).
With age, many people have some gum recession, which leaves the root of the tooth exposed. The MedlinePlus medical encyclopedia notes that this is why cavities in older adults are more likely to form on the root. A dry mouth also lets bacteria build up more easily. If you notice your gums pulling back, read receding gums and loose teeth.
In older adults, medication is probably the most common cause (MedlinePlus). The NIDCR's Dry Mouth: Questions and Answers guide says more than 400 medicines can make the salivary glands produce less saliva. These are the ones the NIDCR and the MedlinePlus encyclopedia mention most, prescription and over-the-counter alike:
Important: never stop or change a medication on your own. Talk to your doctor or pharmacist about alternatives. Sometimes there are options, but that decision belongs to your doctor.
Radiation to the head and neck can damage the salivary glands, and chemotherapy can make saliva thicker (NIDCR). If you are about to start radiation, ask for a dental checkup first.
Sleeping with your mouth open, smoking and drinking alcohol all dry the mouth. MedlinePlus also lists dehydration and stress.
Aging by itself does not cause dry mouth. But older adults tend to have more health conditions and take more medicines, and that raises the risk (MedlinePlus). Taking several drugs that dry the mouth adds up.
The NIDCR describes these signs:
These steps bring relief. They do not fix the cause, but they make the day easier:
Keep your expectations realistic. A Cochrane review of 36 trials found no strong evidence that any product applied in the mouth reliably relieves dryness. Gum does increase saliva in people who still make some.
If your glands still make some saliva, your doctor or dentist may prescribe a medicine that helps them work better (NIDCR).
Many people notice it most when they wake up. What helps:
With a dry mouth, daily care matters even more. The NIDCR recommends brushing gently at least twice a day with fluoride toothpaste, flossing and avoiding sticky, sugary foods. If you do eat them, brush soon after.
If your dry mouth comes from medication, your cavity risk is higher. At the office, your dentist or hygienist may apply a fluoride varnish or foam (NIDCR, Older Adults and Oral Health). For home, they may suggest a prescription fluoride gel or a fluoride rinse. More in fluoride in Florida's water.
A dry mouth can make dentures feel uncomfortable and fit less well. Without saliva, they can rub your gums or the roof of your mouth and cause sore spots. Yeast infections can also develop under the denture (NIDCR).
Schedule a checkup if:
When not to wait: if your face or jaw is swollen, or you have a fever, call your dentist the same day. If you have trouble breathing or swallowing, call 911 or go to the emergency room.
PureSmile Miami opens on November 2, 2026, at 8000 SW 117th Ave, Suite 100, in Kendall. At your first visit, our dentist examines your mouth, goes over your medication list and walks you through your X-rays to show whether any early cavities are starting and what extra protection makes sense for you. We see patients in English or Spanish, verify your insurance for free and give you a written treatment plan before we start.
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Hundreds do, including drugs for high blood pressure, depression, bladder control and allergies. Do not stop any of them on your own: talk to your doctor or pharmacist.
Often it is from sleeping with your mouth open, dry air or medicines you take. A bedroom humidifier and breathing through your nose can help.
Water, sipped through the day and with meals, or sugarless drinks. It helps to limit coffee, alcohol and acidic juices, which dry or sting.
It is common, but it is not normal: aging alone does not cause it. There is usually a reason, such as medication, and it is worth finding with your dentist and your doctor.
Diabetes is one of the conditions that can cause dry mouth, according to the NIDCR. If your mouth is often dry and you do not know why, tell your doctor.
General information; not a substitute for an in-person evaluation. Sources: NIDCR (Dry Mouth; Dry Mouth: Questions and Answers; Sjögren's Disease; Older Adults and Oral Health); MedlinePlus (Dry Mouth; Medical Encyclopedia); Cochrane (topical therapies for dry mouth, 2021); MouthHealthy (ADA). Yoan Suárez Zayas, DMD · FL Lic. DN 21413.
