Should you stop your GLP-1 before surgery?
GLP-1 medicines slow your stomach, so food can stay inside longer and raise a risk during anesthesia. Your surgery team tells you when to hold your pen — do not stop it on your own.
GLP-1 medicines like semaglutide and tirzepatide help you lose weight. But before an operation, your doctor may ask you to pause them. Here is why, and what to do.
Why your stomach matters on surgery day
GLP-1 medicines slow down your stomach. Food stays inside longer. This is called delayed gastric emptying, which means your tummy empties slowly. The Wegovy label says plainly: "WEGOVY delays gastric emptying." During anesthesia (the medicine that puts you to sleep for surgery), this can be risky. Food can come back up and enter your lungs. Doctors call this pulmonary aspiration, and it is serious. The Wegovy label warns there have been "rare postmarketing reports of pulmonary aspiration in patients receiving GLP-1 receptor agonists undergoing elective surgeries or procedures."
How long to hold your GLP-1 before a procedure
I should just stop my GLP-1 myself as soon as my surgery is booked.
mostly falsemostly false — explained simply. Do not stop on your own. Your surgeon or anesthesia doctor tells you when to hold it. If you take a GLP-1 for diabetes, stopping too early can push your blood sugar up. The 2024 multi-society guidance says this is a shared decision between you and your care team, and the ASA says if a diabetes GLP-1 is held longer than the dosing schedule, an endocrinologist (diabetes doctor) may help bridge your sugar control. So tell the team first, then follow their plan.
Before your surgery — a simple checklist
The bottom line
Do not stop your GLP-1 on your own. Ask your surgery team when to hold it — daily pens usually on the day, weekly pens about a week before. Always tell the anesthesia team you take a GLP-1, so they can keep your stomach and lungs safe.