Dentists' warning on popular weight-loss drugs
June 24, 2026
Dentists are urging Australians taking, or considering, GLP-1 weight-loss medications to be aware of potential oral health side effects, including bad breath, dry mouth and an increased risk of cavities. This comes amidst Bupa research which revealed 1 in 5 Aussies would consider using medication for weight loss.
The data suggests 57 per cent of people want to lose weight, including 75 per cent of women aged 40- 49. While GLP-1 medications are transforming the way many are managing their weight and chronic conditions, active ingredients in these medications can affect saliva flow causing unwanted effects.
Bupa Dental Principal Dentist Dr Mark Dohlad said these medications can deliver real health benefits in managing diabetes and weight loss, but they can also quietly change what’s happening in your mouth.
“One of the potential concerns is dry mouth, which can occur with medications such as semaglutide, often indirectly through reduced fluid intake or dehydration. When saliva levels drop, the mouth loses one of its most important natural defence systems for neutralising acid, washing away bacteria, and protecting tooth enamel.
“Some users may also experience nausea or vomiting, which can expose teeth to stomach acid and weaken enamel over time, further increasing the risk of decay and sensitivity,” Dr Dohlad said.
Originally developed to manage type 2 diabetes and now widely prescribed for weight loss, GLP-1 medications are growing in popularity with around half a million Australians using them monthly which is almost 2 per cent of the adult population.
Dr Dohlad said these medications can be life-changing for many people, but it’s important to understand the full picture with dentists seeing a growing number of patients surprised by how quickly these symptoms can emerge.
“People might start to experience something as simple as bad breath or a dry feeling in their mouth, but it can quickly progress to cavities or even infection.
“Because oral health is closely linked to overall health, collaboration between patients, dentists and prescribing doctors is key. Making sure your dental team knows about any medications you’re taking allows us to provide the best possible care and help prevent small issues from becoming bigger problems,” Dr Dohlad said
This might include more frequent check-ups, tailored oral care routines, or strategies to manage dry mouth and protect your enamel.
“GLP1 medications aren’t going anywhere, so we need to make sure patients are equipped with the right information,” Dr Dohlad said
ENDS
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