Ozempic Sulfur Burps: Why They Happen and What Helps

Ozempic sulfur burps (or sulphur burps, depending on where you live) are rotten-egg-smelling belches that some people notice after starting semaglutide or tirzepatide, or after a treatment change. They are most likely tied to slower stomach emptying and new eating patterns, and the first things worth trying are smaller, slower meals and a short note of when the burps show up. The smell alone cannot tell you what is happening, and not everyone taking these medicines experiences this. The useful question is whether burping comes with other digestive symptoms, when it began, and whether it is persistent or severe.

How common is burping on these medicines?

Burping (listed as "eructation") does show up in the US prescribing information. In the Wegovy weight-management trials it was reported by about 7% of people on the 2.4 mg dose versus under 1% on placebo, and in the Zepbound trials by 4–5% versus 1%. The Ozempic label lists it at lower rates in its diabetes trials, so Ozempic burps are documented, just less often than on the higher weight-management doses. The labels count burping in general, though; they do not describe the smell, so "sulfur burps" as a specific side effect has not really been measured.

Why might they happen?

GLP-1 medicines affect appetite and slow stomach emptying (delayed gastric emptying), so food may stay in the stomach longer, and changes in eating patterns can alter when gas or belching occurs. A rotten-egg smell is generally linked to sulfur-containing gases made during digestion, but there is no good research pinning down exactly why some people on these medicines notice it. Diet, reflux, constipation, an infection or another gastrointestinal problem may also play a role.

What patterns are worth noticing?

For a short period, note when the burps happen, what else you feel, whether you have vomiting or abdominal pain, and whether symptoms appeared after a treatment change. You do not need to log every bite or obsess over individual foods. A simple record (see how to track side effects) can help a clinician tell an occasional nuisance from a pattern that deserves a closer look. If a particular food seems related, describe the association without assuming it is the cause.

What can you do without changing your medicine yourself?

Follow your prescriber's and product leaflet's instructions. Some people find that smaller meals, eating more slowly, avoiding meals that feel uncomfortably large and limiting personal reflux triggers make digestion easier. General MedlinePlus advice on belching also mentions avoiding chewing gum, eating quickly and gas-producing foods or drinks. These are comfort strategies, not guaranteed cures. Do not take someone else's prescription or change a dose to stop burping, and ask a pharmacist or clinician before adding medicines or supplements, especially if you take other treatments.

When is it more than an embarrassing symptom?

Mention burping that does not go away to your clinician. Get prompt medical advice for persistent vomiting, inability to keep fluids down, worsening or severe abdominal pain, fever, yellowing of the skin or eyes, or signs of dehydration. Severe or persistent abdominal pain, especially if it spreads to the back, needs urgent assessment rather than a home remedy (more in severe stomach pain on GLP-1). Symptoms may be unrelated to the medicine, so do not self-diagnose from the smell alone.

What to tell your clinician

Share the medicine name, when symptoms began, your recent treatment timeline, accompanying symptoms, and anything that makes the pattern better or worse. Your clinician can decide whether another cause needs evaluation and whether treatment should be adjusted. The goal is not to tolerate every symptom in silence, nor to assume every burp is dangerous.

Common questions

Does Ozempic cause sulfur burps?

Burping is listed in the Ozempic prescribing information, at lower rates than in the Wegovy and Zepbound trials (about 7% and 4–5% of people respectively, versus around 1% on placebo). The labels only count burping in general and say nothing about the smell, so sulfur burps as a specific side effect have not really been measured. Many people never notice them at all.

Why do Ozempic burps smell like rotten eggs?

A rotten-egg smell is generally linked to sulfur-containing gases made during digestion. GLP-1 medicines slow stomach emptying, so food may sit in the stomach longer, and changes in how and when you eat can shift when gas or belching happens. There is no good research pinning down exactly why some people on these medicines notice the smell, and diet, reflux, constipation or an infection can also play a part.

How do I get rid of sulphur burps on Ozempic?

There is no guaranteed cure, but some people find smaller meals, eating more slowly and avoiding uncomfortably large portions make digestion easier. General advice on belching also suggests skipping chewing gum, eating quickly and gas-producing foods or drinks. Do not change your dose or borrow someone else's prescription to stop burping, and check with a pharmacist or clinician before adding any medicine or supplement.

Do sulfur burps on Mounjaro or Wegovy go away?

Nobody can promise a timeline, because the smell itself has not been studied. What helps is keeping a short record of when the burps happen, what else you feel and whether they followed a treatment change, then bringing that to your clinician. Burping that does not go away is worth mentioning at your next appointment.

When are Ozempic sulphur burps a warning sign?

The burps on their own are usually a nuisance rather than a danger. Get prompt medical advice if they come with persistent vomiting, inability to keep fluids down, worsening or severe abdominal pain (especially pain spreading to the back), fever, yellowing of the skin or eyes, or signs of dehydration. Those symptoms may be unrelated to the medicine, so do not diagnose yourself from the smell alone.