Do Weight Loss Injections Cause Gallbladder Problems?

GLP-1 receptor agonists and related medicines slow gastric emptying and can reduce the movement of bile through the gallbladder. When bile sits still for longer periods, crystals can form and gradually develop into gallstones — a condition called cholelithiasis. Gallbladder inflammation (cholecystitis) is also listed as a known risk. These effects are not unique to weight-loss injections; rapid weight loss itself, from any cause, is a well-established risk factor for gallstones, and these medicines are associated with significant weight changes.

According to the electronic Medicines Compendium (eMC) product information, gallbladder-related events including gallstones and cholecystitis appear in the side-effect profiles of both semaglutide and tirzepatide. They are not classified as common, but they are recognised and documented.

Symptoms that deserve prompt medical attention

• Severe or sudden pain in the upper right or centre of the abdomen
• Pain that radiates to the back or right shoulder
• Nausea or vomiting that accompanies abdominal pain
• Yellowing of the skin or whites of the eyes (jaundice)
• Fever alongside abdominal pain

None of these should be self-managed. Always contact your prescriber or doctor — or seek urgent care if pain is severe — rather than logging symptoms and waiting. GLP Trackr can help you record when and how symptoms appeared, but it is not a substitute for clinical assessment.

If you are curious about other health questions linked to these medicines, the page on weight loss injections and cancer risk covers another area that people commonly ask about. For a broader overview of what these medicines involve, the weight loss injections guide is a good starting point.

The most useful thing you can do with any side effect — including abdominal discomfort — is record it accurately and early, so you can give your prescriber a clear picture at your next appointment, or recognise a pattern that warrants getting in touch sooner.

GLP Trackr's side-effect tracker lets you log symptoms as they happen: what you felt, how severe it was, and when it occurred relative to your injection. Over time, this creates a personal record that is far more useful in a clinical conversation than trying to recall events from memory. If abdominal symptoms cluster around a particular point in your weekly injection cycle, that pattern becomes visible in the app.

The daily check-in — a 30-second morning log — captures mood, energy, and how you are feeling overall each day. Keeping this consistent means that even subtle changes in wellbeing are captured, not lost in the noise of everyday life.

If you want to bring a clear summary of your journey to your next prescriber appointment, the doctor report feature compiles your logged data — doses, side effects, weight trends — into a format you can share directly.

Any decision about whether to continue, pause, or adjust your medication in light of gallbladder symptoms belongs entirely with your prescriber or doctor. GLP Trackr is a tracking tool; it does not offer clinical guidance and is not a substitute for medical care. If symptoms are severe or worrying, please contact a healthcare professional promptly rather than relying on the app.

You may also find the page on the costs associated with weight loss injections useful if you are thinking about the practical side of your treatment. And for the full picture on injections, head back to our weight loss injections hub.

Ready to track your symptoms and journey in one place? GLP Trackr is available free on the App Store and Google Play — start a 7-day trial and see how it fits your routine.