Dry Mouth: Causes, Symptoms & Relief

Dry mouth also called xerostomia, or sometimes "cotton mouth" happens when your salivary glands don't produce enough saliva to keep your mouth properly moist. Occasional dry mouth is normal, but when it's persistent, it can affect your comfort, your ability to taste and chew, and your teeth. Ocotillo Trails Family Dentistry helps patients in San Tan Valley, Gilbert, and Mesa identify what's causing their dry mouth and find real relief.

San Tan Valley (480) 457-1977
Gilbert (480) 963-9900
Mesa (480) 830-3344

Medications That Can Cause Dry Mouth

Medication side effects are the single most common cause of dry mouth, and hundreds of prescription and over-the-counter medications list it as a possible effect. Categories most often linked to dry mouth include:

Antihistamines and decongestants
Antidepressants and anti-anxiety medications
Certain blood pressure medications
Pain relievers
Medications for overactive bladder or urinary conditions
Parkinson’s disease medications

Important: If you suspect a medication is causing your dry mouth, don’t stop taking it on your own. Talk to your doctor first. They may be able to adjust your dose or switch you to an alternative. If you take a medication known to cause dry mouth, taking it earlier in the day rather than at night can also help reduce nighttime symptoms.

Other Causes of Dry Mouth

Beyond medications, health changes, treatments, habits, and breathing patterns can reduce saliva or worsen dryness.

Health Conditions and Treatment

Aging: Dry mouth becomes more common with age, partly due to medication use and other health changes
Cancer treatment: Chemotherapy and radiation to the head or neck can reduce saliva production, sometimes temporarily and sometimes long-term
Underlying health conditions: Including diabetes, Sjögren’s syndrome, stroke, and Alzheimer’s disease
Nerve damage: From injury or surgery in the head or neck

Breathing and Lifestyle Factors

Mouth breathing or snoring, especially at night
Tobacco and alcohol use

Symptoms of Dry Mouth

A sticky or dry feeling in the mouth
Saliva that seems thick or stringy
Bad breath
Difficulty chewing, speaking, or swallowing
A dry or sore throat, or hoarseness—sometimes felt more as a dry throat than dry mouth itself
Cracked lips or sores at the corners of the mouth
Changes in taste
Trouble wearing dentures comfortably

Why Dry Mouth Is Often Worse at Night

Many people notice dry mouth is more pronounced overnight. Saliva production naturally slows down while you sleep, and if you breathe through your mouth or snore, that adds to the effect. If a medication you take is contributing, taking it earlier in the day can help. A cool-mist humidifier in the bedroom can also make a noticeable difference for nighttime symptoms.

What Happens If Left Untreated

Saliva plays a real protective role for your teeth: it washes away food particles, neutralizes acids, and helps prevent bacteria from building up. Ongoing dry mouth increases your risk of cavities, gum disease, mouth sores, and oral thrush—a fungal infection—and can make wearing dentures uncomfortable. It’s a common condition, but it’s not one to simply ignore.

Is There a “Miracle Cure” for Dry Mouth?

There is no single miracle cure for dry mouth that works for everyone, because the right approach depends on the cause. Most people can still find real, meaningful relief once that cause is identified.

Treatment Depends on the Cause

The right approach may involve adjusting a medication with your doctor’s guidance, treating an underlying condition, or addressing mouth breathing and other contributing factors.

Meaningful Relief Is Possible

The right combination of dry-mouth products, hydration, nighttime support, and protective dental care can make a meaningful difference even when dryness cannot be eliminated completely.

What You Can Do at Home

1. Hydrate and Stimulate Saliva

Sip water throughout the day and drink water with meals
Chew sugar-free gum or suck on sugar-free candy, ideally containing xylitol, to stimulate saliva

2. Use Dry-Mouth Support

Try an over-the-counter dry mouth rinse or saliva substitute
Use a cool-mist humidifier at night
Keep lip balm on hand for dry or cracked lips

3. Support Nasal Breathing

Breathe through your nose rather than your mouth when possible, especially at night.

4. Avoid Things That Worsen Dryness

Caffeine and alcohol
Mouthwash that contains alcohol
Tobacco products
Over-the-counter antihistamines and decongestants when avoidable
Sugary, acidic, spicy, or salty foods, which are harder on an already dry mouth and raise cavity risk

How It's Diagnosed

A dental examination can identify signs of dry mouth and help determine whether medical follow-up is appropriate.

Dental Examination

Your dentist can usually identify dry mouth by checking how moist your tongue and cheeks appear and asking about your symptoms, medications, and habits.

Medical Follow-Up

If an underlying medical condition is suspected, your dentist may recommend following up with your physician for further testing.

How We Treat Dry Mouth

Because saliva is so important for protecting your teeth, we take dry mouth seriously as part of your dental care—not just as an annoyance. Depending on the cause, we can recommend fluoride treatments or trays to add extra protection against cavities, suggest dry-mouth-specific rinses or products, and coordinate with your physician if a medication adjustment might help. Our General & Preventive Dentistry team can build this into your regular checkup routine.

Medically Reviewed Information

Medically reviewed by Dr. Matthew Roper, DDS. Last updated September 23, 2026.

Dr. Roper is a licensed general dentist who earned his Doctorate of Dental Medicine from A.T. Still University in Mesa.

This information is for educational purposes and does not replace a professional diagnosis.

Frequently Asked Questions

Is dry mouth at night normal?

Mild dry mouth at night is common, especially if you breathe through your mouth while sleeping. But if it’s severe or disrupting your sleep, it’s worth mentioning to your dentist—it may point to a medication or underlying cause worth addressing.

What is a cotton mouth?

“Cotton mouth” is a common, informal term for dry mouth (xerostomia)—the sensation of your mouth feeling unusually dry or sticky from a lack of saliva.

Can dry mouth be cured?

It depends on the cause. Dry mouth from a temporary cause, such as dehydration, often resolves on its own. Dry mouth from a medication or health condition usually improves significantly with the right treatment, even if it isn’t fully “cured.”

What medications commonly cause dry mouth?

Antihistamines, decongestants, antidepressants, anti-anxiety medications, certain blood pressure medications, and pain relievers are among the most common. Check your medication’s side-effect information, or ask your pharmacist or doctor.

Can dry mouth damage my teeth?

Yes. Saliva helps protect teeth from decay, so ongoing dry mouth raises your risk of cavities and gum disease. This is part of why it’s worth treating rather than just managing the discomfort.

Neighborhoods We Serve

Ocotillo Trails Family Dentistry is proud to welcome patients from San Tan Valley and the surrounding communities, including:

Driving Directions to Our San Tan Valley Dental Office

Visiting Ocotillo Trails Family Dentistry for dry mouth concerns? Our office is at 40815 N Ironwood Rd #102, San Tan Valley, AZ 85140. Travel on N Ironwood Road toward E Ocotillo Road, enter the property, and continue to Suite 102.