Short answer: GLP‑1 medicines do modestly raise the risk of gallbladder problems — gallstones and gallbladder inflammation (cholecystitis). In a large analysis of randomized trials, the overall risk was about 37% higher, and the risk was clearly greater at higher (weight-loss) doses. Rapid weight loss itself also promotes gallstones. It is a real but uncommon effect; the priority is knowing the warning signs, because a gallbladder attack can occasionally affect the kidneys through dehydration and infection.
What the evidence shows. A meta-analysis of 76 randomized trials found GLP‑1 use raised the risk of gallbladder or biliary disease with a relative risk of 1.37. The risk was dose-dependent: elevated at high doses but not clearly raised at low doses. It was also higher in weight-loss trials (relative risk about 2.29) than in diabetes trials — consistent with the idea that rapid, larger weight loss is part of the mechanism.
Why it happens. Two forces combine: GLP‑1 drugs slow gallbladder emptying, so bile sits longer and can form stones; and fast weight loss changes bile composition, a long-known trigger for gallstones regardless of the drug.
Warning signs to act on. Contact a clinician — urgently if severe — for:
- Steady, severe pain in the upper-right abdomen, sometimes reaching the right shoulder blade, often after fatty meals.
- Pain with fever, chills, nausea, or vomiting (possible infection/cholecystitis).
- Yellowing of the eyes or skin, or dark urine with pale stools (possible blocked bile duct).
The kidney connection. A gallbladder attack itself is not a kidney disease, but the vomiting and reduced intake that come with it cause dehydration — and dehydration is the main way GLP‑1–related illness stresses the kidney, especially alongside diuretics, ACE inhibitors/ARBs, or NSAIDs. If you are being worked up for gallbladder pain, keeping fluids up and reviewing those medicines matters.
Bottom line. Gallbladder problems are a recognized, dose-related risk of GLP‑1 therapy, more so at weight-loss doses and with rapid weight loss. The effect is uncommon, but learn the warning signs — and remember that the associated vomiting and dehydration are what can pull the kidneys into it.
Full guides: Semaglutide (Ozempic/Wegovy) and Your Kidneys and Tirzepatide (Mounjaro/Zepbound) and Your Kidneys.
Related questions
Do Ozempic and Wegovy cause gallstones? They can modestly increase the risk. A meta-analysis of randomized trials found about a 37% higher risk of gallbladder or biliary disease overall, higher at weight-loss doses. Rapid weight loss itself also promotes gallstones.
What are the warning signs of a gallbladder problem on a GLP-1? Steady severe pain in the upper-right abdomen (sometimes to the right shoulder blade), pain with fever or vomiting, or yellowing of the eyes or skin. Seek care promptly, urgently if the pain is severe or you have a fever.
How is a gallbladder attack related to my kidneys? Indirectly. The vomiting and reduced intake cause dehydration, which is the main way GLP-1-related illness stresses the kidney — especially with diuretics, ACE inhibitors/ARBs, or NSAIDs. Staying hydrated helps protect the kidney during a gallbladder problem.
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Written and medically reviewed by Dr. Amir S. Naderi, MD, FASN. Last updated: July 9, 2026. Educational information only — not medical advice. Never change or stop a prescribed medication without talking to your doctor.