Yes, burping is a recognized side effect of Ozempic. In clinical trials, up to 2.7% of patients taking the 0.5 mg dose reported eructation (the medical term for burping), compared to 0% of those on placebo. The 1 mg dose showed a slightly lower rate of 1.1%. While burping isn’t among the most common Ozempic side effects like nausea or diarrhea, it’s frequent enough to appear on the FDA-approved label, and many patients find it more bothersome than those numbers suggest, especially when the burps carry a sulfur or rotten-egg smell.
Why Ozempic Causes Burping
Ozempic works by mimicking a natural gut hormone called GLP-1, which activates receptors in several parts of the body. One of those targets is the nerve cells in the stomach wall, where the drug significantly slows gastric emptying. This is partly why Ozempic helps with appetite and blood sugar control: food moves through the stomach more slowly, keeping you feeling full longer and preventing blood sugar spikes after meals.
The downside is that food sitting in the stomach longer than usual begins to ferment. Bacteria in the digestive tract break down that lingering food and produce gases, including hydrogen sulfide. Those gases need somewhere to go, and they escape upward as burps. The hydrogen sulfide is what gives some of those burps a distinctive rotten-egg smell, which patients often describe as “sulfur burps.” One study found that patients taking a GLP-1 drug were more likely to test positive for gases produced by bacterial fermentation in the gastrointestinal tract, confirming that the slower digestion directly drives the problem.
What Sulfur Burps Are
Regular burping is common and usually odorless. Sulfur burps are different. They carry a strong smell resembling rotten eggs, caused by hydrogen sulfide gas that builds up when bacteria break down sulfur-containing foods during the prolonged digestion Ozempic creates. For some people, these burps are occasional and mild. For others, they’re persistent enough to be socially uncomfortable and a real quality-of-life issue.
Sulfur burps aren’t unique to Ozempic. They can happen with any condition or medication that slows stomach emptying. But GLP-1 drugs are especially likely to trigger them because slowing digestion is a core part of how they work, not just an incidental side effect.
Foods That Make It Worse
Certain foods are high in sulfur-containing compounds and more likely to produce hydrogen sulfide gas when they ferment in a sluggish stomach. The common culprits include:
- Eggs, especially hard-boiled
- Cruciferous vegetables like broccoli, cauliflower, cabbage, and Brussels sprouts
- Alliums like garlic and onions
- Red meat and other high-protein foods
- Dairy, particularly for those with any degree of lactose intolerance
- Beer and wine, which contain sulfites
You don’t necessarily need to eliminate all of these. Paying attention to which specific foods trigger your worst episodes and cutting back on those can make a noticeable difference without overhauling your entire diet.
How to Reduce Ozempic Burps
Eating smaller meals is one of the most effective changes you can make. Your stomach is already emptying more slowly on Ozempic, so large meals create a bigger pool of food sitting around fermenting. Eating slowly and chewing thoroughly also helps, since swallowing air during meals adds to the gas buildup.
Over-the-counter options can help manage symptoms. Simethicone (sold as Gas-X) breaks up gas bubbles in the stomach and can reduce bloating and burping. Bismuth subsalicylate (Pepto-Bismol) can also help by binding hydrogen sulfide in the gut. Some patients find relief with herbal teas. Green tea, ginger tea, peppermint tea, and chamomile tea all have mild digestive benefits and can help move gas through the system more comfortably.
Carbonated drinks are worth avoiding too. They introduce extra gas directly into your stomach, which compounds the gas your gut bacteria are already producing from fermented food.
Does It Happen With Other GLP-1 Drugs?
Burping and sulfur burps are not exclusive to Ozempic. They occur across the entire class of GLP-1 receptor agonists, including Wegovy (which contains the same active ingredient at higher doses) and Mounjaro (which targets both GLP-1 and GIP receptors). The underlying mechanism is the same for all of them: slowed gastric emptying leads to food fermentation and gas production. Switching from one GLP-1 drug to another is unlikely to eliminate the problem entirely, though individual responses vary and some people do find one medication more tolerable than another.
When Burping Signals Something More Serious
For most people, Ozempic-related burping is annoying but not dangerous. It tends to be worst in the first few weeks of treatment or after a dose increase, then gradually improves as the body adjusts. However, persistent burping paired with severe bloating, intense abdominal pain, or vomiting could indicate that your stomach emptying has slowed to an extreme degree. This is worth discussing with your prescriber, especially if symptoms are worsening rather than improving over time or if you’re unable to keep food down.
Excessive gas combined with a distended abdomen and persistent nausea may also indicate that your current dose is too high for your body’s ability to adapt. Dose adjustments, including temporarily stepping back to a lower dose, are a common strategy prescribers use to manage gastrointestinal side effects while keeping patients on therapy.