What the Ozempic® labels list near the mouth
None of the three official documents has a dental entry, so the table shows the reactions they do report that dental reviews connect to teeth. Altered taste (dysgeusia) is included because it is the only listed reaction that happens in the mouth itself.
| Reaction | US label, placebo-controlled pool [1] | EU summary, section 4.8 [2] | Canada, Table 2 [3] |
|---|---|---|---|
| Tooth decay, gum disease, dry mouth | not listed | not listed | not listed |
| Vomiting | placebo 2.3%, 0.5 mg 5%, 1 mg 9.2% | common | comparator 3.3%, 0.5 mg 6.4%, 1 mg 8.4% |
| Gastro-oesophageal reflux disease | placebo 0%, 0.5 mg 1.9%, 1 mg 1.5% | common | comparator 1.0%, 0.5 mg 1.6%, 1 mg 2.7% |
| Altered taste (dysgeusia) | among reactions above 0.4% | uncommon | listed as uncommon in patient information |
What dental researchers report
A 2026 narrative review of semaglutide and the mouth, drawing on trials, pharmacovigilance data, case series and laboratory work, found dry mouth (xerostomia) or reduced saliva to be the most consistently reported oral effect [4]. It notes that the dryness often follows stomach symptoms such as nausea, eating less and slower stomach emptying, and lists altered taste, bad breath, mouth tingling or numbness and increased tooth decay among other reported effects. Pharmacovigilance databases showed signals for dry mouth and altered taste. Those are reports, not proof of cause.
A second 2026 review, written for dentists, describes dry mouth, bad breath, enamel erosion tied to vomiting and taste changes as secondary effects of semaglutide’s action on the stomach [5]. A third concludes that human data with oral health outcomes are still scarce, that much of the evidence is preclinical or case-level, and that the oral effects people describe are best seen as consequences of nausea, vomiting, belching and lower fluid intake [6].
How a stomach medicine could reach the teeth
What the label supports: Ozempic® causes more vomiting, reflux and burping than placebo, and slows stomach emptying [1]. Stomach acid reaching the mouth repeatedly is the route dental reviewers link to enamel erosion [5].
A proposed route that has not been measured in Ozempic® trials: less saliva. Saliva rinses food from the teeth and carries calcium and phosphate that help resist decay, so a persistently dry mouth raises the risk of cavities and fungal infections [8]. Whether Ozempic® reduces saliva directly, or mainly through eating and drinking less, is not settled [4][6].
General background: tooth decay starts when mouth bacteria turn sugars and starches into acid. MedlinePlus notes that frequent snacking and constant sipping of sugary drinks keep teeth exposed to acid for longer [9].
Other reasons teeth and gums suffer
- Diabetes itself: NIDCR lists diabetes among diseases that can cause dry mouth [8], and a 2026 scoping review describes a two-way relationship between diabetes and gum disease (periodontitis) [7].
- Hundreds of other medicines, including some for blood pressure, depression and bladder control, reduce saliva [8].
- Plaque that is not removed hardens into tartar and irritates the gums, leading to gingivitis and periodontitis [9].
- Sticky, sugary foods and frequent snacking [9].
- Tobacco and alcohol, which NIDCR suggests avoiding when the mouth is dry [8].
Gums: an open question
There is a separate line of research suggesting GLP-1 medicines might help rather than harm gum tissue. A 2026 scoping review found laboratory and animal studies pointing to anti-inflammatory effects on pathways involved in periodontitis, but judged the human evidence indirect and insufficient to show any benefit [7]. A broader review reached a similar view: GLP-1 receptors are present in oral tissues and early findings on gum inflammation look favourable, while effects on the jawbone remain uncertain [6].
What general sources suggest
For a dry mouth, NIDCR suggests sipping water often, including with meals, chewing sugarless gum or sucking sugarless sweets to encourage saliva, and avoiding tobacco and alcohol [8]. It also says spicy or salty foods can sting a dry mouth, and that a dentist or doctor may suggest saliva substitutes.
For decay, MedlinePlus describes daily brushing and flossing, fluoride toothpaste, regular professional cleaning, keeping sticky foods to mealtimes and cutting down on sugary sips and snacks between meals [9]. It advises contacting a dentist about tooth pain, discomfort or dark spots. None of this is specific to Ozempic®; if vomiting or reflux is frequent, that is a reason to talk to your prescriber as well as your dentist.
Telling your dentist about Ozempic®
Ozempic® is a once-weekly injection for type 2 diabetes, and it slows stomach emptying [1]. Section 5.10 of the US label describes rare reports of food being inhaled into the lungs during procedures under general anaesthesia or deep sedation, and asks patients to tell healthcare providers about planned procedures [1]. MedlinePlus specifically includes dental surgery in this advice [10].
Ozempic® is a registered trademark of Novo Nordisk A/S. PepLabo is not affiliated with or endorsed by Novo Nordisk.
When to get help
| Sign | Who to contact | How fast | Source |
|---|---|---|---|
| A swollen face, lips, tongue or throat, or difficulty breathing or swallowing | Stop Ozempic® and get emergency help, as the Medication Guide says for serious allergic reactions | Emergency | Ozempic® Medication Guide [1] |
| Vomiting that does not stop, or that leaves you unable to keep fluids down | Your prescriber, promptly, because of the dehydration warning | Today | Ozempic® Medication Guide [1] |
| Tooth pain, discomfort or dark spots on the teeth | Your dentist | At your next appointment | MedlinePlus [9] |
| A mouth that stays dry | Your dentist or doctor, to find the cause | At your next appointment | NIDCR [8] |
| A planned dental surgery or treatment under sedation | Tell the dentist and the team giving sedation that you use Ozempic®, before the appointment | At your next appointment | MedlinePlus [10], Ozempic® label section 5.10 [1] |
