Why do I have sulfur burps on Wegovy?

Semaglutide slows gastric emptying — food stays в the stomach 2-4x longer than normal. This delayed transit lets gut bacteria ferment sulfur-containing proteins (eggs, meat, dairy, garlic, cruciferous vegetables), producing hydrogen sulfide gas. The "rotten egg" smell is the result. Mitigation: smaller meals, lower-sulfur protein sources (poultry, fish), avoid garlic/onions/eggs first 4 weeks, peppermint tea after meals. Persists past 12 weeks? Talk к your prescriber about anti-nausea support or slower titration. Not dangerous but socially disruptive.

Ozempic and nausea — incidence, timing, and management (2026)

Timing

When nausea appears

Peaks during dose escalation (week 4-12). Most patients tolerate 1 mg without significant nausea.

Mechanism

Why it happens

Same gastric-emptying mechanism as Wegovy (same molecule). Lower max dose means lower peak nausea.

Management

What to do

Smaller meals, low fat. Hold at 0.5 mg longer if 1 mg triggers nausea. Ondansetron PRN.

When to escalate

Persistent vomiting, dehydration, abdominal pain radiating to back (pancreatitis). Same-day care.

Editorial note

What the evidence says

Ozempic nausea is generally milder than Wegovy because of the lower dose ceiling. If you are tolerating Ozempic at 2 mg, expect nausea to return briefly when you titrate above that range on Wegovy.

Other Ozempic side effects

Ozempic and constipation →
Ozempic and diarrhea →
Ozempic and vomiting →
Ozempic and fatigue and tiredness →
Ozempic and headaches →

Nausea on other GLP-1s

Wegovy and nausea →
Mounjaro and nausea →
Zepbound and nausea →
Saxenda and nausea →

Editorial summary, not medical advice. Incidence figures from FDA prescribing information and pivotal trial publications. Individual experience varies. Coordinate side effect management with your prescriber.