Ozempic, Wegovy, and your mouth

If you're on Ozempic, Wegovy, or one of the similar drugs, you may have noticed your mouth feels different — drier than it used to be, breath that's a little off, or some queasy mornings in the early weeks. The same effects that make these drugs hard on the stomach can reach your teeth, and a few easy habits keep them from doing harm.

What these drugs do to your stomach

The GLP-1 medications — semaglutide (Ozempic, Wegovy) and tirzepatide (Mounjaro, Zepbound) — work partly by slowing how fast your stomach empties. That curbs appetite, and it's also why the common side effects are digestive: nausea, vomiting, and acid reflux, strongest in the first weeks as the dose climbs. On Wegovy, about 24% of people report vomiting, against 6% on a placebo.¹ Dry mouth turns up too — it's on the label for tirzepatide, and reported often enough with semaglutide that the FDA's safety database has logged it.²

Why your stomach's side effects reach your teeth

Two well-understood pieces of dentistry connect those side effects to your teeth.

The first is saliva. Saliva is your mouth's main defense against decay: it rinses away food and neutralizes acid. As the ADA notes, "Reduced salivary flow can… increase the chance of developing dental caries, demineralization of teeth, tooth sensitivity, and/or oral infections."³ A drier mouth is a higher-cavity mouth, and it's a common source of bad breath.

The second is stomach acid. When you vomit or reflux, the strong acid that breaks down food washes over your teeth and softens the enamel. Dentists see this pattern clearly in people with eating disorders, where repeated vomiting wears away the inner surfaces of the upper front teeth — erosion the ADA describes as "caused by the forceful expulsion of stomach acids onto the front teeth during vomiting."⁴ (The acid is what does the damage; bile isn't involved.) Frequent reflux does the same thing, more slowly, by lowering the pH in your mouth.⁵

What no one has measured yet

The mechanisms above are well established, and these drugs clearly cause the triggers, but no study has checked whether GLP-1 users develop more cavities or more erosion. The dental research hasn't been done. A 2026 review in the British Dental Journal said it plainly: "there is limited dental literature addressing their effects on… the oral cavity."⁶ The FDA's voluntary database has collected reports of dry mouth, and a smaller number of cavities and tooth loss, in people on these drugs, though voluntary reports can't show the drug was the cause.⁷ That gap is a reason to take good care of your teeth.

Two worries you can set down

You might expect appetite changes to push people toward sweet drinks. A 2025 survey from the University of Arkansas found the opposite: people on GLP-1s tend to drink less soda and juice, which is easier on the teeth.⁸ The early research on these drugs and gum disease — so far in animals — points toward an anti-inflammatory effect, if anything.⁹ Neither finding is the last word.

How to protect your teeth while you're on a GLP-1

None of this means stopping anything. It means a few easy habits, most of which work against the dry mouth and acid directly:

• Sip water through the day. The simplest fix for a dry mouth, and it helps your breath.
• Keep your saliva moving. Sugar-free gum or lozenges prompt your mouth to make more saliva.
• If the dryness sticks around, a moisturizing spray or gel can help. These coat the tissue and hold water against it; the ADA lists moisturizing sprays and gels among the over-the-counter options for a dry mouth.³ The better ones lean on xylitol, a sugar alcohol that oral bacteria don't readily metabolize — so, unlike a sugary lozenge, it isn't feeding the acid that causes decay.¹⁰ The FDA lets foods sweetened with it carry the claim "does not promote tooth decay."¹¹ What xylitol has not been shown to do is prevent cavities: a Cochrane review found the evidence too weak to say either way.¹² So treat it as comfort, not protection. These are on drugstore shelves — and we sell one at the office too, which you should know when you weigh the advice.
• If you get sick, rinse — don't brush right away. Brushing acid-softened enamel can wear it down. Rinse with water (a teaspoon of baking soda mixed in helps), then brush about 30 minutes later.¹³
• Keep up the fluoride. Brushing twice a day with a fluoride toothpaste helps re-harden enamel that acid has softened.
• Tell your dentist you're on it. It belongs in your health history — the ADA recently added the question to its standard form. If your mouth has gone dry, we might suggest cleanings a little more often or a stronger fluoride.

These drugs help a lot of people. If you're on one and your mouth has changed — drier, or rougher in the mornings — tell us. We'll help you protect your teeth while the medication does its job.