I've been on semaglutide for 4 months (currently 1.7 mg), lost 35 lbs, and for the past week I've been getting this sharp pain in my upper right abdomen, especially after eating. Sometimes it radiates to my right shoulder blade. It comes in waves — intense for 20-30 minutes then fades.

I googled it and everything points to gallbladder. Is GLP-1 use linked to gallbladder problems? Should I be worried or is this just another "fun" side effect?

Please get evaluated this week — ideally tomorrow. What you're describing is a classic presentation of biliary colic (gallstone-related pain): RUQ pain, postprandial, radiating to the right scapula, episodic. This is not a "wait and see" situation.

To answer your question: yes, GLP-1 RAs are associated with an increased risk of gallbladder events. From the clinical data:

The mechanism is twofold:

1. Rapid weight loss increases cholesterol saturation in bile, promoting stone formation
2. GLP-1 may directly affect gallbladder motility, reducing emptying

You need a right upper quadrant ultrasound. If stones are found and you're having recurrent biliary colic, the standard treatment is cholecystectomy (gallbladder removal). Don't let this progress to acute cholecystitis — that's a surgical emergency.

I had my gallbladder out at month 5 of semaglutide. I'm sharing this not to scare you but to validate that this absolutely happens and you should take it seriously.

My timeline:

• Month 4: occasional sharp RUQ pain after fatty meals, I ignored it
• Month 5: woke up at 3am with the worst pain of my life, vomiting, couldn't get comfortable. Went to the ER.
• ER found gallstones with signs of acute cholecystitis (inflamed, infected gallbladder)
• Emergency cholecystectomy the next morning

I wish I'd gone to the doctor when the occasional pains started. An elective laparoscopic cholecystectomy is a much better experience than an emergency one. Please go get checked.

FWIW — I continued semaglutide after surgery and I'm fine. You don't need a gallbladder. Recovery was about a week.

I had the same symptoms around month 3 and it turned out to be gallbladder sludge (not stones yet, but the precursor). My doctor put me on ursodiol (ursodeoxycholic acid) to help dissolve it and prevent stone formation. I continued semaglutide and the pain resolved.

So it's not necessarily straight to surgery — but you won't know until you get imaging. Go get checked.

Good point about ursodiol. In patients with a history of gallstones or biliary sludge, some providers do prescribe ursodiol prophylactically during rapid weight loss (300 mg BID is a common regimen). This is well-established in bariatric surgery literature and applies here.

If you have risk factors for gallstones (female, over 40, family history, prior pregnancies, Native American or Hispanic ethnicity), it's worth discussing prophylactic ursodiol with your prescriber before you develop symptoms.