Understanding Mounjaro Sulphur Burps: Relief Guide

Introduction

Mounjaro is designed to support weight loss and control appetite. Many people may notice mild side effects in their digestive system, especially when starting the treatment. One of the side effects is sulphur burps, they have a strong smell, often described as similar to rotten eggs.

As unpleasant as it may seem, sulphur burps on Mounjaro are usually not dangerous and often improve with time. This guide explains what are the causes, how long it lasts, and how to reduce or manage them.

Related read: Everything You Need To Know About Mounjaro As A First-Time User

 

Summary Box

• Sulphur burps happen when the food stays in the stomach longer. This can increase sulphur gas, especially when foods that can trigger like eggs, meat, dairy, or fizzy drinks.
• Most people see improvement between 6 to 8 weeks. Symptoms disappear when the digestive system adjusts.
• Reduce them by eating smaller meals, chewing food slowly, avoiding foods that trigger symptoms, drinking plenty of water, and avoiding some habits that cause you to swallow extra air.
• Seek help if symptoms last longer for 8 weeks, and come with pain, vomiting, diarrhoea, and weight loss.

 

What Are Sulphur Burps?

Sulphur burps are burps that have a strong unpleasant smell, they are often compared to rotten eggs. Some experience them once in a while but others experience them throughout the day.

This can happen on their own or along with the other digestive issues like bloating, mild nausea, or changes in bowel movements.

Related read: Understanding Mounjaro Long‑Term Side Effects: Key Insights

 

Why sulphur burps smell bad

The bad smell comes from a gas called hydrogen sulphide. This gas is produced when bacteria in your gut break down certain foods that have sulphur in it.

Small amounts of gas are harmless and go unnoticed, but when digestion slows down and fermentation increases, gas can build up that may lead to sulphur-smelling burps.

 

Why Does Mounjaro Cause Sulphur Burps?

Mounjaro does not contain sulphur, it is only how the medication affects your digestive system that burps can happen.

 

Slower digestion and delayed gastric emptying

Mounjaro works by slowing down how quickly food leaves your stomach. This is called delayed gastric emptying and helps you feel fuller for longer and supports weight loss.

But when food stays in the stomach longer, bacteria have more time to break it down. This increases the risk of gas production, including hydrogen sulphide.

 

Changes in gut bacteria

Mounjaro also changes the balance of bacteria in your gut, these bacteria play an important role in digestion. When the balance shifts, some experience more gas, bloating, or changes in stool consistency.

Related read: Mounjaro Diarrhoea: Tips for Quick Relief

Verified Before & After

Verified Before & After

 

Foods that can trigger sulphur burps

There are foods that can cause sulphur burps especially during the early weeks taking Mounjaro. These are the common triggers:

• Eggs
• Processed meats
• Red meat
• White bread, pasta, and refined carbohydrates
• Greasy and fried foods
• Alcohol and fizzy drinks

These foods are hard to digest or high in sulphur, and can worsen fermentation when you have slow digestion.

 

How Long Do Sulphur Burps Last on Mounjaro

Timeframe	What to Expect
First few weeks (starting or increasing dose)	Sulphur burps may be experienced as your body adjusts to Mounjaro. It is common during the first few weeks of treatment.
6 to 8 weeks	Symptoms improve as your body adapts. Burps are less frequent or stop completely.
8 weeks and beyond	It is important to seek medical advice if symptoms worsen any time.

 

Ways to Reduce and Manage Sulphur Burps

These are some tips to reduce sulphur burps while on Mounjaro:

Make simple dietary changes

Do not eat foods that can trigger sulphur burps, these include:

• Eggs and high fat meats
• Full fat dairy products
• Fried and greasy foods
• Pastries, white breads, and refined carbs
• Alcohol and fizzy drinks

Choose lighter meals with lean protein, whole grains, vegetables, and foods that are digested easier.

Related read: What to Eat on Mounjaro: 10 Healthy Choices

 

Eat smaller meals and eat slowly

Eating smaller portions will help you digest meals easier. Larger meals are harder to digest and increase gas production.

Take your time to chew your food well while eating. This reduces swallowed air and makes digestion easier.

 

Stay hydrated and support gut health

When you drink enough water, it helps move food through the digestive system more smoothly. Sip water throughout the day rather than drinking large amounts at once.

Also, many people find that slowly adding fibre to their diet helps in digestion, do this slowly to avoid extra gas. If experiencing diarrhoea, try drinking electrolyte drinks to help maintain hydration.

 

Change daily habits

You can reduce excess air and burping by:

• Avoiding drinking through straws
• Avoiding chewing gum
• Not smoking
• Wearing loose clothing around the stomach

 

When to see a doctor

Seek advice from your doctor if sulphur burps last longer than 8 weeks, are painful, or affecting your daily life. It is important to speak to a professional if symptoms come with vomiting, ongoing diarrhoea, stomach pain, and weight loss.

 

Managing Expectations While on Mounjaro

Digestive symptoms usually get better with time

Many digestive side effects of Mounjaro are most noticeable at the beginning of treatment. For some, symptoms reduce when the body adjusts to the medication and gets easier to manage over time

 

Support from your clinic

Your prescribing clinic can help if side effects are hard to manage. Do not change your dose without the permission of your GP.

Related read: Mounjaro and Alcohol: Safe Drinking Practices Explained

 

FAQs

• What causes sulphur burps while on Mounjaro?

Mounjaro slows down your digestion. Food stays in the stomach longer that creates more gas as it breaks down. The gas can smell like rotten eggs and cause sulphur burps.

• Are sulphur burps common with Mounjaro

Yes they can happen especially within the first few weeks of a dose increase.

• How long before it resolves?

For most people, they improve within 6 to 8 weeks.

• What foods can make sulphur burps worse?

Avoid foods that can trigger, eggs, red meat, dairy, fried foods, white bread or pasta, alcohol or fizzy drinks.

• Do I need to stop Mounjaro if I have sulphur burps?

No, sulphur burps are not harmful but may cause discomfort if accompanied with severe stomach pain, vomiting, weight loss, or ongoing digestive issues.