Burps with a rotten-egg smell are reported by some people on GLP-1 medications. General information on food choices and eating habits that may reduce them, options to raise with your provider, and when to call.
The smell comes from hydrogen sulfide gas produced as food is broken down. Because GLP-1 medications slow stomach emptying, food sits longer and more gas can form — particularly from sulfur-containing foods.
The symptom is usually harmless, if unpleasant, and many people find it eases with dietary changes. It is worth a call to your provider if it comes with pain, vomiting, or signs of dehydration.
Sulfur-rich foods are the most common contributors. Reintroducing them one at a time can show which matter for you.
Eating slowly and chewing well; talking while eating, straws, chewing gum, and carbonated drinks all add swallowed air.
Several smaller meals rather than large ones, and staying upright for a while after eating.
Water through the day rather than only with meals.
Ask before trying any of these, and mention every medication and supplement you already take. This page does not give doses.