Does Ozempic cause sulfur burps?
Yes. Ozempic is semaglutide, and semaglutide lists belching as an adverse reaction. The specific "rotten-egg" smell is not in the label — the labeled term is the odor-neutral "eructation" — but the mechanism clinicians describe is clear: slowed stomach emptying lets food, especially sulfur-rich protein, sit and ferment into hydrogen sulfide gas, which smells of rotten eggs. Unpleasant, not dangerous on its own.
In the trials, sulfur burps was reported in belching (the labeled term) 7% versus under 1% on placebo. Those figures come from the weight-management trials of semaglutide; Ozempic is a lower (diabetes) dose, so the rates you personally experience may be lower — but the mechanism and the management are the same.
When it starts and whether it fades
Tends to appear when emptying is slowest — early on and after dose increases — and eases as the gut adapts. Often worse after a large or high-sulfur meal.
What actually helps
- Smaller meals eaten slowly, and not lying down straight after, give the stomach time to empty.
- Cutting back high-sulfur foods — eggs, red meat, garlic, onions and cruciferous vegetables like broccoli, cabbage and cauliflower — is the change people report helps most. Experience-based, not label-proven.
- It usually settles as the dose stabilizes; if not, your prescriber may slow the titration.
These management steps are general gastroenterology practice, not instructions from the Ozempiclabel — there is no semaglutide-specific management guideline. Run any laxative, anti-diarrheal or supplement past your prescriber or pharmacist, especially alongside other medications.
When it is an emergency, not a side effect to manage
On their own, burps are benign. Foul burping combined with vomiting, a distended abdomen and no bowel movement is the combination to worry about — it can be an early sign the gut has stalled (ileus), which is an emergency.
For the full picture across the class, see the complete Ozempic side-effect list.