How to manage sulphur burps on Mounjaro

If you’re experiencing unpleasant, rotten-egg-smelling burps while taking Mounjaro, you’re not alone in wondering what’s causing them. Often called sulphur burps or eggy burps, they can be uncomfortable, embarrassing, and particularly frustrating when they start affecting your everyday life.

The distinctive smell comes from hydrogen sulphide gas, which can be produced during digestion. Although sulphur burps aren't specifically listed as a side effect of Mounjaro, the medication can cause digestive side effects, including burping, nausea, and bloating.

In this guide, we’ll explore why sulphur burps may happen while taking Mounjaro, how long they might last, and practical steps you can take to manage them.

Are sulphur burps a common side effect of Mounjaro?

Sulphur burps aren't specifically listed as a common side effect of Mounjaro, so we don't know exactly how frequently they occur during treatment.

However, belching (burping) is a recognised side effect, alongside other digestive symptoms such as nausea, bloating, and indigestion. These symptoms can be more noticeable when starting Mounjaro or increasing your dose.

While experiencing eggy burps on Mounjaro can be unpleasant, they aren't necessarily a sign that something is wrong. However, persistent symptoms or burping accompanied by significant abdominal pain, vomiting, or other concerning symptoms should be discussed with your healthcare team.

What causes sulphur burps on Mounjaro?

Sulphur burps get their distinctive rotten-egg smell from hydrogen sulphide, a gas that bacteria in your digestive system can produce when breaking down certain substances, including sulphur-containing compounds.

Mounjaro slows down how quickly food leaves your stomach, which may help explain why some people experience more burping and other digestive symptoms during treatment. However, research hasn't established exactly why some people develop sulphur-smelling burps specifically.

Other factors, including what you eat and how your digestive system responds to certain foods, may also influence gas production. Foods containing sulphur, such as eggs, meat, and some vegetables, are sometimes associated with sulphur burps, although there isn't strong evidence that avoiding these foods will prevent the symptom in people taking Mounjaro.

How long do sulphur burps last on Mounjaro?

There’s no established timeframe for how long sulphur burps on Mounjaro might last. Some people may experience them occasionally, while others may find they persist or return during treatment.

The official Mounjaro product information explains that digestive side effects such as nausea, vomiting, and diarrhoea are more common during dose escalation and generally decrease over time. However, this doesn't necessarily mean sulphur burps will follow the same pattern.

If your symptoms continue, become more frequent, or start affecting your everyday life, speak to your healthcare team. They can help you explore possible causes and ways to manage them.

How to stop sulphur burps on Mounjaro

There’s no guaranteed way to stop sulphur burps on Mounjaro, but a few simple changes to your eating and drinking habits may help reduce digestive discomfort.

“If you're experiencing sulphur burps on Mounjaro, try starting with a few simple changes. Eating smaller portions, staying hydrated, and paying attention to foods that trigger your symptoms may help. If the problem persists, speak to your pharmacist about other options.”

Niya MansuriPrescribing Pharmacist

Eat smaller, more frequent meals

Mounjaro slows down how quickly food leaves your stomach, so eating large meals may leave you feeling uncomfortably full. Try smaller portions throughout the day and eat slowly, giving yourself time to recognise when you're satisfied.

Stay hydrated

Drinking enough water supports normal digestion and can be particularly important if you're experiencing other Mounjaro side effects, such as vomiting or diarrhoea. Try sipping water regularly throughout the day rather than drinking large amounts at once.

Pay attention to what you eat

Certain foods may make digestive symptoms more noticeable. If you find that rich, fatty, or heavily processed meals seem to trigger your burps, try reducing them and see whether your symptoms improve.

You don't need to cut out nutritious foods simply because they contain sulphur. Instead, pay attention to your individual triggers and aim for a balanced diet.

Try a soothing herbal tea

Some people find warm drinks such as peppermint, chamomile, or green tea soothing when experiencing digestive discomfort. However, there's limited evidence that these teas specifically prevent or relieve sulphur burps on Mounjaro.

Ask your pharmacist about gas relief

Medicines containing simeticone, such as Wind-Eze or WindSetlers, may help relieve trapped wind and bloating. However, they aren't proven treatments for the distinctive smell associated with sulphur burps.

Speak to your pharmacist before trying an over-the-counter treatment, particularly if your symptoms are persistent or you're unsure what's causing them.

When should you seek medical support?

Occasional sulphur burps may not be a cause for concern, but speak to your doctor or healthcare team if your symptoms:

• persist, become more frequent, or continue to get worse
• are affecting your ability to eat, drink, or go about your daily activities
• are accompanied by persistent nausea, vomiting, or diarrhoea
• occur alongside other unexplained digestive symptoms

Seek urgent medical attention if you experience severe, persistent abdominal pain, particularly if it spreads to your back. This can be a sign of acute pancreatitis, a recognised rare but serious side effect of Mounjaro.

Your healthcare team can help determine whether your symptoms are related to Mounjaro or another digestive condition and advise you on the safest next steps.

Get support throughout your treatment

Sulphur burps and other digestive symptoms can be uncomfortable, particularly when they interfere with your everyday life. If you're struggling with side effects during Mounjaro treatment, you don't have to manage them alone.

myBMI treatment plans include ongoing clinical support, as well as free medication to help manage certain side effects, if deemed appropriate. Our clinical team can help you understand your symptoms and explore ways to make treatment more manageable.

Sources

• Mounjaro. (2026) EMA. [Accessed 11 October 2026]
• What Stinks? The Role of Hydrogen Sulfide in the Gut. (2023) ASM. [Accessed 11 October 2026]
• Bloating. (2026) NHS. [Accessed 11 October 2026]
• Acute pancreatitis. (2026) NHS. [Accessed 11 October 2026]