How to Get Rid of Sulfur Burps on GLP-1

Key takeaways

• Sulfur burps are burps that smell of rotten eggs. Burping is a listed side effect of both drugs: 7% on semaglutide 2.4 mg versus under 1% on placebo, and 4 to 5% on tirzepatide versus 1%. It clusters, like nausea, in the weeks after each dose increase.
• The usual explanation is hydrogen sulfide made by gut bacteria from sulfur in food that sits longer in a slowed gut. That fits what is known about both processes, but no study has measured it in GLP-1 users.
• What helps, in order of evidence: smaller meals and stopping at fullness, no carbonated drinks, a lower-fat diet, and a slower escalation agreed with the prescriber (label and consensus support); fewer sulfur-heavy foods (plausible, untested).
• Bismuth subsalicylate cut hydrogen sulfide from stool by more than 95% in a 1998 study of 10 adults, but it has never been tested on burps. Simethicone has no evidence for burping at all.
• Sulfur burps with repeated vomiting, a swollen or painful abdomen, no bowel movements, or pain spreading to the back are not a nuisance symptom. Call the same day.

The short answer

To get rid of sulfur burps on a GLP-1, eat smaller meals and stop at the first sign of fullness, drop carbonated drinks and alcohol, go easy for a while on the most sulfur-heavy foods (eggs, large portions of meat, cabbage-family vegetables), avoid lying down after eating, and ask your prescriber to hold your current dose longer if the burps come back with every increase. Over-the-counter remedies have weak or no evidence. Most sulfur burps fade as your body adjusts; the ones that come with vomiting or pain need a call. This page belongs to our GLP-1 side effects guide; its sibling explains whether tirzepatide causes hair loss.

What sulfur burps are, and why GLP-1 drugs cause them

A sulfur burp is gas from the upper gut that smells of rotten eggs, the smell of hydrogen sulfide. Two things the drugs do make it more likely.

They slow the stomach. Semaglutide and tirzepatide delay gastric emptying, and both labels say so. The size of the effect can be large: in a 12-week randomized trial in 20 women with polycystic ovary syndrome and obesity, semaglutide 1 mg left 37% of a solid test meal in the stomach four hours after eating, against none on placebo; half of the meal took 171 minutes to empty, versus 118 on placebo (Jensterle 2023). A 2022 expert consensus notes that nausea is most common in the first four to five weeks, when emptying is most delayed, and that the slowing partly wears off with continued, gradual treatment, an effect it calls tachyphylaxis (Gorgojo-Martinez 2022).

Bacteria make hydrogen sulfide from sulfur in food. Gut bacteria produce it from sulfur-containing amino acids, found mostly in protein, and from inorganic sulfur. In a controlled feeding study, five healthy men ate diets ranging from no meat to 600 g of meat a day for 10 days each; the sulfide in their stool rose from 0.22 to 3.38 mmol/kg as meat intake increased (Magee 2000).

Put together, the usual explanation is that food sitting longer gives bacteria more time to turn its sulfur into gas. That is plausible, and it is what clinicians tell patients, but it has not been demonstrated: both studies of hydrogen sulfide above measured it in stool, not in the stomach, and we found no study of sulfur burps in GLP-1 users. Some burps on these drugs are simply swallowed air and a full, slow stomach, without any smell.

How common burping is on the labels

Source: pooled placebo-controlled weight-loss trials, up to 68 weeks for Wegovy and 72 weeks for Zepbound (Wegovy label) (Zepbound label). Neither label separates sulfur-smelling burps from ordinary ones. The Wegovy label lists burping among the gastrointestinal reactions "most frequently reported during dosage escalation," and the Zepbound label says most gastrointestinal events occurred during escalation and decreased over time. The cross-trial comparison is not head to head; the trials differed in population and length.

What helps, and how good the evidence is

The meal measures come from a 2022 multidisciplinary consensus on managing GLP-1 gastrointestinal side effects, whose worked example of a patient with frequent burping and heartburn after a dose increase recommends smaller, more frequent meals, avoiding fat, fried and processed food, coffee, cola, alcohol and carbonated drinks, and not lying down soon after meals, with a short course of acid-reducing medicine before continuing escalation (Gorgojo-Martinez 2022). Reasonable as they are, none of them has been tested in a trial of GLP-1 users.

Dose and timing. The labels' own remedy is time. The Wegovy label allows a dose increase to be delayed by four weeks if a dose is not tolerated; the Zepbound label tells prescribers to consider a lower maintenance dose. The consensus adds stepping back to the previous dose or pausing until symptoms settle. Do not improvise this by skipping injections: the Wegovy label says that after two or more missed weekly doses, escalation should restart at a lower dose to limit gastrointestinal side effects. If you use a compounded vial and the burps and nausea suddenly worsen after a refill, check that the units you draw still match the concentration on the new label; the units converter does the arithmetic.

Sulfur-heavy foods. The foods usually blamed are those rich in sulfur-containing protein or sulfur compounds. The link between meat and gut sulfide is measured (Magee 2000); the link between any food and GLP-1 burps is not. Cut one group at a time for a week, and keep protein adequate overall, because eating too little protein brings its own problems, including hair shedding.

Bismuth subsalicylate. It binds hydrogen sulfide. In ten healthy adults taking 524 mg four times a day for three to seven days, hydrogen sulfide released from stool fell by more than 95% (Suarez 1998). That was the colon, not the stomach, and nobody has tested it on burps or in GLP-1 users. Its over-the-counter label does list belching among the symptoms of overindulgence it is sold to relieve, and it carries real cautions: it contains salicylate, so it is not for anyone allergic to aspirin or taking other salicylates; ask first if you take a blood thinner or a diabetes, gout or arthritis medicine; do not use it with an ulcer, a bleeding problem or black stool; and stop and ask a doctor if symptoms last more than two days (bismuth subsalicylate label). It also darkens the tongue and stool, which can mask the black stool of bleeding.

Simethicone. It breaks up gas bubbles and is sold for gas pressure and bloating. We found no trial testing it for belching, for sulfur burps or in people on GLP-1 drugs. It is unlikely to hurt, and unlikely to change the smell.

When sulfur burps signal something else

Burps alone are a nuisance. With other symptoms they can be the first sign of a problem the labels warn about:

• Severely delayed stomach emptying. Repeated vomiting, especially of food eaten many hours earlier, fullness after a few bites, and upper-abdominal bloating. Both labels say the drugs are not recommended in severe gastroparesis, and a claims-database study linked GLP-1 drugs prescribed for weight loss with more gastroparesis than bupropion-naltrexone (adjusted hazard ratio 3.67, wide confidence interval), an association rather than proof (Sodhi 2023).
• Bowel obstruction or ileus. A swollen, painful abdomen, vomiting, and no stool or gas. Both labels list ileus and intestinal obstruction among post-marketing reports.
• Pancreatitis. Severe, persistent abdominal pain, often spreading to the back, with or without vomiting. The labels say to stop the drug and seek care.
• Dehydration. Vomiting or diarrhea that stops you keeping fluids down, dizziness on standing, very little urine. Most kidney-injury reports on both labels followed fluid losses.

When to call

Call your prescriber the same day for any of the symptoms in the list above, for vomiting that lasts more than a day, or for burping with chest pain (which needs to be distinguished from heart pain). Go to an emergency department for severe abdominal pain, a rigid or swollen abdomen with vomiting, or signs of severe dehydration. Raise it at your next contact if burping persists for weeks, returns with every dose step, or is ruining meals; a slower escalation is a legitimate request, and the side effects guide lists the other options a prescriber has.

Frequently asked questions

+−What causes sulfur burps on GLP-1 drugs?

Semaglutide and tirzepatide slow the emptying of the stomach, so a meal stays in the gut for hours longer than usual. The usual explanation for the rotten-egg smell is hydrogen sulfide, which gut bacteria make from the sulfur in protein-rich and sulfur-rich foods, and which has more time to form when food moves slowly. That chain has not been measured directly in GLP-1 users, but burping itself is a recognized side effect on both labels: 7 percent on Wegovy versus under 1 percent on placebo, and 4 to 5 percent on Zepbound versus 1 percent.

+−How do you get rid of sulfur burps from Ozempic fast?

There is no proven fast fix. What helps most people is eating less at a sitting and stopping at the first sign of fullness, skipping carbonated drinks and alcohol, cutting back for a while on the most sulfur-heavy foods such as eggs, large portions of meat, and cabbage-family vegetables, and not lying down after eating. If the burps come with heartburn or persist through several dose steps, ask the prescriber about holding the current dose longer before the next increase.

+−Does bismuth subsalicylate help sulfur burps?

It might, but the evidence is indirect. In a small 1998 study, ten healthy adults who took bismuth subsalicylate four times a day for three to seven days had more than 95 percent less hydrogen sulfide released from their stool. Nobody has tested it on burps or in people taking GLP-1 drugs. It contains salicylate, so it is not for people allergic to aspirin, and its label says to ask first if you take a blood thinner or a diabetes medicine and keeps it away from children and teenagers recovering from chickenpox or flu-like illness. It darkens the stool, which can hide or mimic bleeding, and the label says to stop and ask a doctor if symptoms last more than two days.

+−Does simethicone help sulfur burps?

There is no evidence that it does. We found no trial of simethicone for belching, for sulfur burps or for GLP-1 side effects. It is an antifoaming agent sold for gas pressure and bloating, it is not absorbed and it is generally harmless, so some people try it, but it does nothing to hydrogen sulfide and should not delay a call about vomiting or pain.

+−What foods cause sulfur burps?

The foods usually blamed are those rich in sulfur: eggs, red meat and other large protein portions, cabbage-family vegetables such as broccoli, cauliflower, cabbage and Brussels sprouts, garlic and onions, and drinks or dried fruit preserved with sulfites. In a controlled feeding study, the amount of sulfide produced in the gut rose with the amount of meat eaten. No study has tested a low-sulfur diet for GLP-1 burps, so treat this as trial and error: cut one group at a time and keep the protein your body needs.

+−How long do sulfur burps last on Mounjaro or Zepbound?

No study has measured it. The labels say gastrointestinal effects, burping included, cluster during dose escalation and ease over time, so expect them to flare after each increase and settle at a steady dose; our GLP-1 side effects guide has the trial timing data for nausea and vomiting. Burps that persist for weeks, or arrive with vomiting, pain or bloating, deserve a call rather than more waiting.

+−Are sulfur burps a sign of something serious?

Usually not, on their own. They matter when they come with other symptoms: repeated vomiting, especially of food eaten many hours earlier; early fullness after a few bites; a swollen, painful abdomen; no bowel movement or gas; or severe pain spreading to the back. Those can point to severely delayed stomach emptying, bowel obstruction or pancreatitis, all of which appear in the labels' warnings, and they need a same-day call.

+−Should I skip a dose to stop sulfur burps?

Not on your own. The labels' tool is a slower escalation: Wegovy allows a dose increase to be delayed by four weeks and Zepbound a lower maintenance dose. Skipping is not neutral either: the Wegovy label says that after two or more missed weekly doses, escalation should restart at a lower dose, because restarting at full strength raises the risk of gastrointestinal side effects. Ask the prescriber, who can also pause the drug if it is warranted.

Sources

1. LabelNovo Nordisk. Wegovy (semaglutide) injection and tablets: prescribing information, revised June 2026 (DailyMed setid ee06186f-2aa3-4990-a760-757579d8f77b). (2026)
2. LabelEli Lilly. Zepbound (tirzepatide) injection, for subcutaneous use: prescribing information, revised August 2026 (DailyMed setid 487cd7e7-434c-4925-99fa-aa80b1cc776b). (2026)
3. StudyJensterle M et al. Semaglutide delays 4-hour gastric emptying in women with polycystic ovary syndrome and obesity. Diabetes Obes Metab 2023;25:975-84. (2023)
4. StudyMagee EA et al. Contribution of dietary protein to sulfide production in the large intestine: an in vitro and a controlled feeding study in humans. Am J Clin Nutr 2000;72:1488-94. (2000)
5. StudySuarez FL et al. Bismuth subsalicylate markedly decreases hydrogen sulfide release in the human colon. Gastroenterology 1998;114:923-9. (1998)
6. GuidelineGorgojo-Martinez JJ et al. Clinical recommendations to manage gastrointestinal adverse events in patients treated with GLP-1 receptor agonists: a multidisciplinary expert consensus. J Clin Med 2022;12(1):145. (2022)
7. StudySodhi M et al. Risk of gastrointestinal adverse events associated with glucagon-like peptide-1 receptor agonists for weight loss (research letter). JAMA 2023;330:1795-7. (2023)
8. LabelDailyMed. Bismuth subsalicylate 525 mg per 30 mL oral suspension, OTC Drug Facts label (uses, warnings and directions), published September 10, 2026. (2026)