Gallstones After Ozempic®, Wegovy®, or Bariatric Surgery
How rapid weight loss from GLP-1 medications or bariatric surgery affects gallstone risk — symptoms, prevention, and when to seek care.
One of the most common questions patients ask is whether medications such as Ozempic® (semaglutide), Wegovy® (semaglutide), Zepbound® (tirzepatide), or Mounjaro® (tirzepatide) cause gallstones. The answer is more complex than a simple yes or no.
Does Ozempic® Cause Gallstones?
Current evidence suggests that rapid weight loss itself is one of the primary reasons gallstones develop, regardless of whether the weight loss occurs through bariatric surgery, GLP-1 medications, or a very low-calorie diet. As the body rapidly breaks down fat stores, the liver releases more cholesterol into bile while the gallbladder empties less frequently.
Does Bariatric Surgery Increase the Risk?
Yes—but for the same reason. Patients who lose weight rapidly after gastric sleeve, gastric bypass, or SADI-S also have an increased risk of developing gallstones. The risk is generally highest during the first 6 to 18 months, when weight loss is most rapid. Learn more about gallstones after bariatric surgery →
Is One Treatment Riskier Than Another?
The risk of gallstones appears to be related more to the amount and speed of weight loss and individual risk factors than to the specific treatment itself.
Your risk may be higher if you:
- Lose weight rapidly
- Lose a large amount of weight
- Have obesity before treatment
- Are female
- Are over 40 years old
- Have a family history of gallstones
- Have had gallstones previously
Can Gallstones Be Prevented?
- Stay well hydrated
- Meet your daily protein goals
- Follow your postoperative nutrition plan
- Attend regular follow-up visits
- Take ursodiol (ursodeoxycholic acid) if recommended by your surgeon
What Symptoms Should I Watch For?
Contact your healthcare provider if you develop:
- Pain in the upper right abdomen
- Pain after eating, especially fatty foods
- Pain that radiates to the back or right shoulder
- Nausea or vomiting
- Fever or chills
- Yellowing of the skin or eyes (jaundice)
- Dark urine or pale stools
Should I Stop My Weight-Loss Medication?
No—not without discussing it with your healthcare provider. For most patients, the health benefits of achieving and maintaining a healthier weight outweigh the risk of developing gallstones. If gallbladder symptoms develop, evaluation and treatment can usually be performed without permanently stopping your weight-loss plan.
The bottom line: Both bariatric surgery and GLP-1 weight-loss medications are highly effective treatments for obesity. While rapid weight loss can increase the risk of gallstones, most patients never develop symptoms. If you have concerns, Dr. Bao Nasri can help you understand your individual risk and discuss strategies to support safe, successful weight loss.