Short answer: Wegovy (semaglutide) can cause burping: the UK product information (SmPC, section 4.8) lists it as a common side effect, which may affect up to 1 in 10 people, mainly seen while the dose is being increased. The UK leaflets do not list sulphur or eggy-smelling burps separately, and no UK source we have read explains the smell. Smaller meals and less rich, fatty or spicy food may help, and a pharmacist can suggest an indigestion medicine. Severe, persistent stomach pain, with or without vomiting, or yellowing of the skin or eyes needs urgent medical help.
This guide sets out what the UK product information and the NHS say, as of October 2026: why burping happens on Wegovy, how long it tends to last, what may help, the tablets and the 7.2mg dose, and the signs that need a doctor.
Does Wegovy cause sulphur burps?
Wegovy can cause burping, and its UK leaflet lists it as common, which means it may affect up to 1 in 10 people. The product information for healthcare professionals (the SmPC) uses the medical word, eructation, and adds that it is mainly seen while the dose is being increased. Neither document describes a smell: "sulphur" or "eggy" is how people describe the burps, not a separate side effect. The same leaflet lists upset stomach or indigestion, wind, bloating and reflux as common too, and the NHS counts burping among the symptoms of indigestion.
| Medicine | How often the UK leaflet lists burping | Where it says so |
|---|---|---|
| Wegovy injection (FlexTouch pens) | Common, up to 1 in 10 people, mainly while the dose is going up | Leaflet section 4, SmPC section 4.8 |
| Wegovy tablets | Common, up to 1 in 10 people | Leaflet section 4 |
| Mounjaro KwikPen | Common, up to 1 in 10 people | Leaflet section 4 |
Why do sulphur burps happen on Wegovy?
The UK product information does not say why burping happens on Wegovy, or why some people notice a sulphur smell. What it does say is that semaglutide, the medicine in Wegovy, causes a minor delay in stomach emptying just after meals (SmPC, section 5.1), and that stomach and gut side effects are mainly seen while the dose is going up.
Our pharmacist's judgement, not a finding from a UK source: food staying in the stomach a little longer after a meal may be one reason burping is more noticeable on Wegovy, and the smell may come from gases made as that food is broken down. We have not found a UK source that confirms either point.
How long do sulphur burps last on Wegovy?
Burping on Wegovy is mainly seen while the dose is going up, the UK product information says, which on the standard schedule means the first 16 weeks. The dose starts at 0.25mg and rises every 4 weeks to 2.4mg from week 17. Adults with a BMI of 30 or above can step up again to 7.2mg after at least 4 weeks on 2.4mg, and that step is another dose increase.
- 0.25mg, Weeks 1 to 4
- 0.5mg, Weeks 5 to 8
- 1mg, Weeks 9 to 12
- 1.7mg, Weeks 13 to 16
- 2.4mg, From week 17
Stomach and gut side effects were reported most often during the dose increases, and most were mild to moderate and short-lived (SmPC, section 4.8). The product information gives no timescale for burping itself, so if it carries on once your dose is steady, tell your pharmacist. It also says that if stomach symptoms are significant, the next dose increase can be delayed, or the dose lowered to the previous one, until they improve. Talk this through with your pharmacist rather than changing your dose yourself. Every step is in our Wegovy dose schedule.
How do you stop sulphur burps on Wegovy?
Nothing in the UK product information is aimed at burping itself, but the NHS self-care advice for indigestion, which includes burping, is a good place to start. These tips come from nhs.uk's indigestion and heartburn pages, as of October 2026.
Eat smaller, more frequent meals. The NHS suggests this for heartburn and acid reflux, which are listed side effects of Wegovy too.
Cut down on rich, spicy or fatty foods. The NHS indigestion advice says not to have them. Indigestion is the group of symptoms burping belongs to.
Cut down on tea, coffee, cola and alcohol. From the NHS indigestion advice. The NHS semaglutide page also advises against drinking alcohol, as it can make feeling or being sick worse.
Leave 3 to 4 hours between eating and bed. The NHS says not to eat in the 3 to 4 hours before you go to bed.
Check your painkillers. The NHS says not to take ibuprofen or aspirin unless they have been prescribed for you, as they can make indigestion worse. Ask a pharmacist if you take them.
Do not smoke. The NHS lists smoking among the causes of indigestion.
If burping is hard to live with, speak to your pharmacist rather than stopping treatment: the NHS advice on semaglutide is to keep taking it unless you are advised to stop. Our guides to what to eat on Wegovy and Wegovy side effects cover meals and the other stomach side effects.
Thinking about Wegovy? Our consultation asks about your health and your medicines, and a GPhC-registered pharmacist reviews every answer before anything is supplied.
Check your eligibilityCan a pharmacist help with sulphur burps?
Yes. The NHS says a pharmacist can recommend medicines to ease the burning feeling or pain that can come with indigestion, and its heartburn page names antacids and alginates. Tell the pharmacist you use Wegovy, and about any other medicines you take, so they can check the medicine suits you. The NHS adds that antacids and alginates work best taken with food or soon after eating, and help in the short term but should not be taken regularly for long periods. If you have heartburn most days, or pharmacy medicines are not helping, it says to see a GP.
Wegovy tablets add one rule: the leaflet says to wait at least 30 minutes after your tablet before eating, drinking or taking other medicines by mouth, so never take an antacid in those 30 minutes. If you are a Solira patient, you can also message your pharmacist through your account about any side effect.
Do Wegovy tablets cause sulphur burps?
Wegovy tablets can cause burping too: their UK leaflet lists it as common, which may affect up to 1 in 10 people, and lists upset stomach or indigestion as very common, affecting more than 1 in 10. The tablets contain semaglutide, the same medicine as the injection, taken once a day. This is what we tell patients about the tablets' most common side effects:
Very common (more than 1 in 10): headache, nausea, vomiting, diarrhoea, constipation, indigestion, stomach pain, feeling weak or tired. These are most noticeable while your dose is increasing and usually settle. Eat smaller meals, avoid very fatty food, and keep well hydrated.
The rest are in our guide to oral semaglutide side effects.
Are sulphur burps worse on Wegovy 7.2mg?
The UK product information gives no separate burping figure for the 7.2mg dose, so it does not say whether burping is more common at 7.2mg. It does say that in the STEP UP trials of 7.2mg, stomach side effects were reported most often during the dose increases, in the first 20 weeks of treatment. Because burping is mainly seen during dose increases, tell your pharmacist if it starts again after the step up. More on the higher dose is in our guide to Wegovy 7.2mg.
When are burps a sign of something more serious?
Burping on its own is not usually a sign of anything serious: the NHS says the same of indigestion, which includes burping. It matters when other symptoms come with it.
When to get help: our pharmacist's advice
Stop your treatment and seek urgent medical help if you experience: severe, persistent stomach pain, especially spreading to your back, with or without vomiting. This can be a sign of pancreatitis. Sudden pain in the upper right of your tummy, fever, or yellowing of the skin or eyes: possible gallbladder problems. Sudden loss of vision, or loss of part of your field of vision: seek same-day eye assessment. Swelling of the face or lips, difficulty breathing, or a widespread rash: call 999.
The NHS says to see a GP if you keep getting indigestion, are in severe pain, find it hard to swallow, keep being sick, have iron deficiency anaemia, feel like you have a lump in your stomach, or have blood in your vomit or poo. The NHS says to call 999 or go to A&E if you are vomiting bright red blood or your vomit looks like ground coffee, your poo has blood in it or is black, sticky and very smelly, you have severe tummy pain or it is painful to touch your tummy, or you have chest pain that started suddenly.
The NHS lists a stomach ulcer among the causes of indigestion. Its main causes are an infection with H. pylori bacteria and regular use of anti-inflammatory painkillers such as ibuprofen, and a GP can test for H. pylori with a breath test or a sample of poo. So if burping carries on after your dose is steady, or comes with a burning pain in the upper tummy that is often worse at night (the main symptom of an ulcer, the NHS says), see your GP rather than assuming it is Wegovy.
Do sulphur burps happen on Mounjaro too?
Yes: the UK leaflet for Mounjaro lists burping as common too, up to 1 in 10 people, as the table above shows, and the same NHS self-care advice applies. Our guide to sulphur burps on Mounjaro covers that medicine, and weight loss injection side effects sets the two injections side by side.