Noticed burps that smell like rotten eggs since starting Mounjaro? You’re not alone. Some people get sulphur burps when they begin Mounjaro or increase the dose, and it can feel embarrassing and uncomfortable. The good news is that this side effect is usually mild and can often be managed with small changes to what you eat, how you eat and when you take your injections. In this guide, we’ll explain why sulphur burps on Mounjaro happen, when to worry, and simple steps you can take today to reduce the smell and feel more in control.
Sulphur burps, the ones that smell exactly like rotten eggs, happen when a gas called hydrogen sulphide builds up in your stomach.
They are different from normal burps, which usually just release swallowed air with little or no smell. With sulphur burps, you may notice:
These burps can happen to anyone. Common triggers include high-sulphur foods, and when you are on Mounjaro, the slower digestion can make these smells more noticeable.
Yes, Mounjaro can trigger sulphur burps in some people. These eggy burps are usually linked to how Mounjaro slows digestion and to the types of foods you eat, rather than to anything “wrong” with the medicine itself.
In most cases, sulphur burps on Mounjaro:
If the smell is strong, lasts for weeks, or comes with severe pain, vomiting or other worrying symptoms, it’s important to speak to a clinician or pharmacist for advice.
There isn’t an exact percentage for sulphur burps in the official leaflets, but burping and excess gas are recognised stomach side effects with Mounjaro. What most people report is a pattern, rather than constant trouble:
Mounjaro (tirzepatide) mimics the effects of the natural gut hormones that help control blood sugar and appetite. One of its effects is that it slows down how quickly your stomach empties. This is helpful for blood sugar and weight loss, but it also means food stays in your stomach and small bowel for longer.
For many, the smell fades as their body gets used to the medicine and they adjust their meals and habits. If things are getting stronger rather than easing, or you feel unwell between burps, that’s a sign to check in with a clinician instead of waiting for it to pass on its own.
When the sulphur burps on Mounjaro are in full swing, you want quick, simple fixes. Here are the steps you need to follow to stop it fast:
Most sulphur burps on Mounjaro are harmless, even if the smell is unpleasant. But sometimes they can signal that your stomach is struggling more than it should. It’s important to know the difference between a mild side effect and something that needs medical attention.
Sometimes, ongoing sulphur burps can be linked to issues like reflux, gastritis, H. pylori infection or a stomach bug, all treatable, but best checked early. A quick review can rule out other causes and ensure your Mounjaro plan is still right for you.
Small, steady habits often make the biggest difference when you’re using Mounjaro. These tips help your stomach cope better with slower digestion and reduce the chances of eggy burps returning.
Managing sulphur burps on Mounjaro can feel frustrating, especially when you’re already adjusting to a new treatment. At The Care Pharmacy, we’re here to make that process easier and safer for you.
Our clinicians and pharmacists will:
If sulphur burps are affecting your comfort, confidence or daily routine, you don’t have to manage them alone. Pharmacists at The Care Pharmacy are always here to help you feel supported, informed and in control of your treatment journey.
Use smaller meals, reduce high-sulphur foods, avoid fizzy drinks, stay upright after eating, and ask a clinician if symptoms continue.
Eggs, garlic, onions, cabbage, broccoli, cauliflowers, fatty meals, fizzy drinks and alcohol can increase sulphur gas while digestion is slowed.
Light meals, slow eating, steady hydration, gentle walking and pharmacist-approved gas-relief products may help manage discomfort safely.
Yes. Slower digestion may shift gut bacteria balance, allowing more sulphur-producing bacteria to release stronger-smelling gas.
It can. Slower stomach emptying allows sulphur gases to rise, leading to occasional eggy breath or burps in some users.
Medically reviewed by
Superintendent Pharmacist
Many people exploring prescription weight loss treatments ask the same question. Is Saxenda right for me, or are there other options that may work better? With increasing awareness of injectable weight loss treatments, it is important to understand how Saxenda compares with other injections and with traditional weight loss methods. This guide explores how Saxenda […]
If you are ready to take control of your health and work towards a healthier weight, understanding your starting point is essential. At The Care Pharmacy, we support patients across the UK with safe, clinically led online weight loss services. Many people begin their journey by using an ideal body weight calculator to understand where […]
A new clinical analysis suggests that orforglipron, Eli Lilly’s first GLP-1 weight-loss pill, may become a strong alternative to weekly injections like Wegovy and Mounjaro. The findings come from the latest GLP-1 study 2025, where researchers reported meaningful reductions in body weight, improved blood sugar control, and benefits for adults living with type 2 diabetes […]
Mounjaro can cause diarrhoea because tirzepatide slows digestion and changes gut motility, leading to more frequent bowel movements as your body adjusts. Diarrhoea is a common and usually short-term side effect, especially in the first few weeks or after a dose increase. In this guide, you’ll understand the exact reasons diarrhoea can happen on Mounjaro […]
Thinking about stopping Mounjaro (tirzepatide) can feel a bit unsettling. You’ve worked hard to lose weight, built new habits, and you don’t want everything to slip back the moment the injections stop. The good news is that coming off Mounjaro can be safe, steady and manageable when you understand what your body does next and […]
If you’re struggling with obesity, you must have heard numerous pieces of advice about eating clean, doing a calorie-deficit diet, going to the gym, etc. But nothing is really working because you are unable to control your food cravings. The issue is that outdated counsel won’t make a difference unless a suitable drug is combined […]
