Why Wegovy Burps Taste Like Eggs — and What to Do About It

The biggest misconception: eggy burps mean something has gone wrong

Most people who search this topic assume the smell means spoiled medicine, an allergy, or a sign that treatment isn't suiting them. In practice, the opposite is often true. The egg-like odour is a predictable consequence of semaglutide doing exactly what it is designed to do.

Semaglutide activates GLP-1 receptors in the gut, which slows gastric emptying, the rate at which your stomach pushes food into the small intestine. Food sitting in a slower-moving digestive system ferments for longer. Sulphur-containing compounds in everyday foods break down and release hydrogen sulphide gas. That gas has to go somewhere, and burping is the body's most efficient exit route. The NHS semaglutide medicines page lists burping and indigestion among the known common side effects of the medicine.

So the eggy smell is not the medicine going off, not a sign of intolerance, and not a warning that something is broken. It is the gastric-emptying mechanism made audible and odorous. That doesn't make it any less mortifying in a meeting, but it does mean it can be managed rather than treated as a crisis. For a broader look at the gastrointestinal side-effect profile, the full Wegovy side effects guide covers the pattern in more detail.

When eggy burps tend to appear, and how long they last

The timing follows a fairly consistent pattern. Burps are most likely to appear in the first few days after starting Wegovy or after a dose increase, when the slow-down in gastric emptying is at its most pronounced relative to what your body is used to. As your digestive system adapts, the symptom typically softens. For many people, this takes one to three weeks at a given dose.

The practical implication: if you've just moved up to a new dose and the eggy burping has returned, that's expected. It should settle again. If you're still dealing with it after four to six weeks at a stable dose, it's worth mentioning to your prescriber, not because it signals danger, but because there may be adjustments worth trying.

A quick check worth building into your routine: keep a rough mental note of what you ate in the 24 hours before a bad day for burps. You'll often spot the culprit within a week. Eggs themselves, red meat, garlic, onions, cruciferous vegetables (broccoli, cauliflower, Brussels sprouts), and fizzy drinks are the most common contributors. If you want to understand exactly why semaglutide and eggs are such a reliable trigger for sulphurous burping, that connection is explained in detail on a dedicated page. The connection between sulphur intake and burp severity on Wegovy is consistent enough that reducing these foods during dose-adjustment weeks makes a noticeable difference for a lot of people.

Meal timing matters too. Large meals take longer to clear a slower stomach, so smaller, more frequent meals produce less fermentation pressure. Eating slowly, sitting upright for at least 30 minutes after eating, and staying well hydrated all reduce the build-up. Carbonated drinks add gas on top of gas, cutting them during the adjustment phase is an easy win. For the wider question of what this medicine costs through a private service, the Wegovy pricing page sets out what a transparent private price typically includes.

The side effects that actually need urgent attention

Eggy burps are a quality-of-life problem. They are not a medical emergency. The symptoms worth taking seriously are different in character: severe, persistent abdominal pain (particularly pain that bores through to the back) with or without vomiting, is the pattern associated with pancreatitis, which the MHRA flagged as a known but infrequent risk in a Drug Safety Update published in January 2026. That kind of pain is urgent; eggy burping is not in the same category.

Other symptoms worth a call to your prescriber or GP: signs of dehydration from prolonged vomiting or diarrhoea, severe heartburn that isn't settling, or any new symptom that feels qualitatively different from the mild nausea and digestive grumbling most people experience early in treatment. If you're unsure whether what you're experiencing is normal, our FAQs address many of the common questions, and our prescribers are reachable through the contact page seven days a week.

The broader guide to taste and mouth-related side effects on semaglutide is also relevant here, some people notice a metallic or sulphurous aftertaste that is connected to the same gastric-emptying mechanism, and if you are specifically on Wegovy you may find it useful to read about how egg burps present on Wegovy and what tends to help. That page looks at what can help and when it tends to resolve. If you're still in the research phase, the main Wegovy overview covers the full licensed picture. And if you're weighing up whether treatment is right for you, checking your eligibility with our prescribers is free and takes only a few minutes.