Your gallbladder is a small pouch under the liver that stores bile, the fluid that helps digest fat. Gallstones are hardened bits of that bile, and Wegovy's label lists acute gallbladder disease as one of its warnings, and the trial numbers show why [1]. The adult injection-trial percentages were below 2%, but these events can be important and some gallbladder problems require surgery. Know the warning symptoms. The drug behind Wegovy is covered in semaglutide.
Wegovy is linked to more gallstones than placebo
The label puts it directly: “Treatment with WEGOVY is associated with an increased occurrence of cholelithiasis and cholecystitis” [1]. Cholelithiasis means gallstones, and cholecystitis means an inflamed gallbladder.
In adult weight-loss trials of the injection, gallstones were reported by 1.6% of people on Wegovy and 0.7% on placebo. Inflammation was reported by 0.6% versus 0.2% [1]. Put another way, roughly 16 in 1,000 people on Wegovy reported gallstones, against 7 in 1,000 on placebo.
| Who was studied | Gallstones (Wegovy vs placebo) | Gallbladder inflammation (Wegovy vs placebo) |
|---|---|---|
| Adults, injection | 1.6% vs 0.7% | 0.6% vs 0.2% |
| Adults, tablets | 2.5% vs 1% | Not stated separately |
| Ages 12 and older, injection | 3.8% vs 0% | 0.8% vs 0% |
All figures from weight-reduction trials in the Wegovy prescribing information [1]. Each row is a different trial population, so compare within a row, not across rows.
Weight loss alone doesn't explain it, the label says
Losing weight quickly is a known risk for gallstones, whatever the method, so you might expect that to account for the whole difference. The label says it doesn't: “Substantial or rapid weight loss can increase the risk of cholelithiasis; however, the incidence of acute gallbladder disease was greater in WEGOVY-treated patients than in placebo-treated patients, even after accounting for the degree of weight loss” [1].
The patient counseling section repeats the point for patients: gallbladder disease “may also occur in the absence of substantial or rapid weight loss” [1]. So a slow, steady loss doesn't rule it out. The label doesn't explain why semaglutide has this effect, and this page doesn't guess.
Rates differed across age groups and formulations
Two groups stood out in the label's data. In the trial of children 12 and older, 3.8% on the Wegovy injection reported gallstones and none on placebo did; 0.8% reported inflammation, again against none [1]. The label notes the incidence “was higher in WEGOVY injection-treated pediatric patients aged 12 years and older than in WEGOVY injection-treated adults.”
Adults on the tablets reported gallstones at 2.5% versus 1% on placebo tablets [1]. The tablet trials were separate studies with their own populations, so the gap with the injection isn't a head-to-head result. The pill itself is covered in oral semaglutide.
Four symptoms can mean a gallbladder problem
Wegovy's Medication Guide tells patients: “WEGOVY may cause gallbladder problems including gallstones. Some gallbladder problems need surgery. Call your healthcare provider if you have any of the following symptoms” [1]. It lists four:
- pain in your upper stomach (abdomen)
- yellowing of skin or eyes (jaundice)
- fever
- clay-colored stools
Ordinary stomach upset is far more common on Wegovy than any of these, which can make it hard to tell the two apart. This table separates them using the label's own lists. It isn't a diagnosis, and anything severe, persistent or new deserves a call. You can also report side effects to FDA's MedWatch program [2].
| Symptom | More typical of | What the label says to do |
|---|---|---|
| Queasy, mild nausea, more after a dose increase | Ordinary digestive side effects | Tell your provider if it's severe or won't go away |
| Bloating, burping, gas | Ordinary digestive side effects | Talk to your provider about any side effect that bothers you or doesn't go away |
| Pain in the upper stomach | Possible gallbladder problem | Call your healthcare provider |
| Fever with stomach pain | Possible gallbladder problem | Call your healthcare provider |
| Yellow skin or eyes, or clay-colored stools | Possible gallbladder problem | Call your healthcare provider |
| Severe stomach pain that won't go away, sometimes felt in the back | Possible pancreatitis | Stop Wegovy and call your healthcare provider right away |
Wording follows the Wegovy Medication Guide [1]. How common the ordinary digestive effects are, and how long they last, is in Wegovy nausea and constipation.
Can you take Wegovy without a gallbladder? The label doesn't say
Wegovy's label doesn't address people who've had their gallbladder removed. Gallbladder removal isn't one of its contraindications, and there's no separate guidance for people without one [1]. The label alone cannot establish personal suitability after gallbladder removal; the prescriber can consider the history and other relevant evidence.
So this is a prescriber's call, made with your history in front of them. These questions are worth bringing to that visit:
- Why was my gallbladder removed, and does that change anything for me on Wegovy?
- Which symptoms should make me call you, given I don't have a gallbladder?
- Do I have any history of pancreatitis or bile duct problems that matters here?
If gallstones are suspected, the label calls for tests and follow-up
The label's instruction to prescribers is short: “If cholelithiasis is suspected, gallbladder studies and appropriate clinical follow-up are indicated” [1]. The label doesn't say Wegovy must stop. That's decided case by case, with your prescriber.
Gallbladder disease sits alongside the label's other warnings, such as pancreatitis and kidney injury from dehydration. The whole list is in is Wegovy safe, and the full side-effect table is in Wegovy side effects.
Gallbladder warnings run across this drug class
Wegovy isn't alone here, since Zepbound's label carries a gallbladder warning too, with its own trial numbers, covered in Zepbound side effects. Trials of different drugs used different people and methods, so their rates can't be ranked against each other. If you're choosing between them, the brand page in Wegovy is a starting point for the conversation with your prescriber.