top of page
< Back

Gallstones

SYM-000010

Part of the DietApp.com GLP-1 Side Effect Reference, a comprehensive, regularly reviewed resource.

What It Is

Gallstones (cholelithiasis) are hardened deposits that form in the gallbladder. In some cases they cause no symptoms, while in others they lead to pain, inflammation (cholecystitis), or require surgical removal of the gallbladder (cholecystectomy). Clinical trial data shows gallbladder-related events in roughly 1.6 to 2.5 percent of semaglutide patients compared to about 0.6 to 1.1 percent on placebo, with tirzepatide trials showing broadly similar modestly increased rates.

Why It Happens

Two mechanisms are thought to contribute. First, and most significant, rapid weight loss itself, regardless of cause, is a well-established gallstone risk factor: losing weight quickly increases cholesterol concentration in bile, making stone formation more likely. This is the same reason gallstones are common after bariatric surgery. Second, GLP-1 medications may have a direct effect on gallbladder motility and contractility, which can contribute to bile stasis (bile sitting in the gallbladder longer than usual), independent of the weight loss itself.

When to Seek Care

Many gallstones cause no symptoms and are found incidentally. Contact your provider promptly if you experience right upper abdominal pain, especially after eating fatty or greasy foods, pain that radiates to your right shoulder or shoulder blade, nausea or vomiting that feels different or more localized than your usual GLP-1 related nausea, fever, or yellowing of the skin or eyes (jaundice). These are the classic signs of a gallstone causing a blockage or gallbladder inflammation and warrant evaluation rather than waiting.

How to Manage It

There's no proven way to fully prevent gallstones on a GLP-1 medication, but a few things are worth knowing:

  • A more gradual pace of weight loss, when achievable, is associated with somewhat lower gallstone risk than very rapid weight loss, though GLP-1 medications are often specifically chosen for their weight-loss speed and effectiveness
  • Most gallstone-related complications are treatable, and not everyone who develops gallstones needs surgery
  • If you develop symptomatic gallstones, your provider will evaluate whether monitoring or cholecystectomy is the right approach for your specific situation
  • This isn't typically a reason to avoid GLP-1 therapy altogether, but it is a real risk worth discussing with your provider, particularly if you have other risk factors for gallstones

References

  • PMC: GLP-1 Receptor Agonists and Gallbladder Disease Risk, Molecular Mechanisms and Clinical Implications
  • PMC: Exploring the Side Effects of GLP-1 Receptor Agonist, To Ensure Its Optimal Positioning
  • Bartley Weight Loss: GLP-1 Long-Term Side Effects, Honest 2026 Safety Review

Track Your Progress with DietApp.com

While DietApp.com can't predict gallstone risk, tracking your weight-loss pace over time can help you and your provider have a more informed conversation about how quickly you're losing weight and whether that pace makes sense for your situation.

Related Resources

Related Articles

Explore DietApp.com Tools

  • Symptom & Side Effect Log, track patterns over time to bring to your next appointment
  • Protein & Hydration Dashboard, see your daily totals at a glance
  • GLP-1 Dose & Injection Tracker, log your weekly dose
  • Download DietApp.com, start tracking your GLP-1 journey today

More From DietApp.com

Explore More

Explore the full GLP-1 Tracker knowledge base on DietApp.com

About DietApp.com

DietApp.com combines evidence-based GLP-1 medication education with practical treatment tracking tools. The information on DietApp.com is intended for educational purposes only and should not replace professional medical advice, diagnosis, or treatment.

Last medically reviewed and updated: July 11, 2026.

gallstones

bottom of page