What the product information says
We searched the US labels, EU product information and Canadian monographs for terms covering teeth and gums. Only two documents mention the teeth at all, and neither describes decay or erosion. The more relevant entries are the stomach and mouth reactions that can affect teeth indirectly.
| Document | Entry | Medicine | Placebo |
|---|---|---|---|
| Victoza®, EU product information [1] | Toothache | Common (up to 1 in 10) | — |
| Trulicity®, Canadian monograph [2] | Tooth infection; dry mouth | Less common trial reactions, no rate | — |
| Wegovy®, US label, adults on 2.4 mg [5] | Vomiting; reflux | 24%; 5% | 6%; 3% |
| Zepbound®, US label, weight-reduction trials [3] | Vomiting; reflux; dry mouth or throat | 8–13%; 4–5%; 1% | 2%; 2%; 0.1% |
| Saxenda®, US label, adults [4] | Vomiting; reflux; dry mouth | 15.7%; 4.7%; 2.3% | 3.9%; 1.7%; 1.0% |
What dental and medical reviews say
A 2026 review written for dentists and physicians lists the oral signs people on semaglutide may present with: dry mouth, bad breath, enamel erosion linked to vomiting, and changes in taste. It frames these as secondary effects of the medicine’s action on the stomach and appetite, not as direct damage to teeth [6].
A broader 2026 narrative review of GLP-1 and related medicines reached a similar view. It described a cluster of patient-reported complaints, popularly called “Ozempic mouth”, “Ozempic teeth” and “Ozempic breath”, linked to nausea, vomiting, burping, lower fluid intake and possible changes in saliva. It also noted that human studies with oral-health outcomes remain scarce and that much of the evidence is preclinical, indirect or drawn from case-level or reporting data [7].
On gums, the picture leans the other way. A 2026 scoping review found laboratory and animal evidence that GLP-1 medicines may reduce inflammation involved in gum disease, but concluded that the human evidence is indirect and too limited to show any benefit [8]. Diabetes itself worsens gum health, so better blood-sugar control could matter more than any direct drug effect.
How the medicine could affect teeth
- Supported by the labels: vomiting and reflux are more common than on placebo [3][4][5]. Stomach acid that reaches the mouth repeatedly can wear away enamel, the route the dental reviews describe [6].
- Supported by the labels: dry mouth is listed for Zepbound® and Saxenda® [3][4]. Saliva washes away food and carries minerals that strengthen teeth; when it is reduced for a long time, decay becomes more likely [9].
- Supported by research: in a UK cohort, starting a GLP-1 medicine was linked to a higher risk of a reflux diagnosis than starting an SGLT-2 inhibitor, though the absolute difference was small [11].
- Proposed but not measured: eating many small meals or sipping sweet drinks through the day, a common way to cope with low appetite, keeps teeth in contact with sugar and acid for longer [10]. This has not been studied in people on GLP-1 medicines.
Other causes to consider
Most tooth decay comes from plaque bacteria turning sugars and starches into acid, and it often causes no symptoms until a cavity is large [10]. Many medicines reduce saliva, including some for blood pressure, depression and bladder control, and diabetes can cause dry mouth on its own [9]. Smoking, alcohol and frequent snacking all play a part [9][10].
Before blaming a GLP-1 medicine, it helps to tell your dentist about everything you take, any reflux symptoms and how your eating pattern has changed. Those details often explain more than the medicine name does.
What may help
NIDCR suggests sipping water through the day, chewing sugarless gum or sucking sugarless sweets to stimulate saliva, and avoiding tobacco, alcohol and drinks high in caffeine when the mouth is dry; it notes that sugarless products containing xylitol may help prevent cavities [9]. Xylitol can cause loose stools in some people, so it is worth watching if diarrhea is already an issue.
MedlinePlus describes brushing at least twice a day, flossing daily, regular dental check-ups and cleanings, fluoride toothpaste, and eating sticky foods with meals rather than as separate snacks [10].
For reflux or repeated vomiting, the first step is to tell your prescriber, since the labels ask patients to report severe or lasting stomach problems [5]. Your dentist can advise on how to look after your teeth after vomiting and whether extra fluoride makes sense for you.
If you need dental treatment under deep sedation or general anaesthesia, tell the dental team that you take a GLP-1 medicine. The labels describe rare cases of food remaining in the stomach and being inhaled during such procedures, and ask patients to inform providers beforehand [3].
Wegovy®, Saxenda® and Victoza® are registered trademarks of Novo Nordisk A/S. Zepbound® and Trulicity® are registered trademarks of Eli Lilly and Company. Ozempic® is a registered trademark of Novo Nordisk A/S, used here only because of the popular phrase. PepLabo is not affiliated with or endorsed by Novo Nordisk or Eli Lilly and Company.
When to get help
| Sign | Who to contact | How fast | Source |
|---|---|---|---|
| Severe or lasting stomach problems, including repeated vomiting | Your prescriber | Today | Wegovy® medication guide [5] |
| Tooth pain, sensitivity to sweet, hot or cold, or dark spots on teeth | Your dentist | At your next appointment | MedlinePlus [10] |
| A dry mouth that lasts, or makes chewing, swallowing or speaking hard | Your dentist or doctor | At your next appointment | NIDCR [9] |
| Planned dental treatment under deep sedation | Your dentist and prescriber, beforehand | At your next appointment | Zepbound® label, section 5.9 [3] |
