Do You Need to Stop Your GLP-1 Before Surgery?
A great deal of what is written about this online is out of date — it describes advice that was replaced in October 2024. Here is the current position, and who actually makes the call.
Ask us about your procedureWhat changed, and why you are seeing conflicting advice
In 2023, anesthesiology guidance advised holding GLP-1 medications before a procedure — weekly formulations for a week beforehand, daily ones on the day. That advice was widely published, and much of it is still sitting on websites and in patient handouts today.
In October 2024 it was superseded by multi-society clinical practice guidance developed jointly by anesthesiology, gastroenterology and metabolic and bariatric surgery organizations — including the American Society for Metabolic and Bariatric Surgery. The headline change: most patients can continue their GLP-1 medication before elective surgery.
If you have been told to stop and the instruction traces back to the older guidance, that is worth raising with the team performing your procedure. It is not a reason to change anything on your own.
What the concern actually was
GLP-1 medications slow gastric emptying. That is part of how they work — food stays in the stomach longer, which is why fullness arrives sooner. Under anesthesia, a stomach that still holds contents raises the risk of those contents entering the airway.
The question was never whether that risk exists. It was whether a blanket instruction to stop the medication was the right way to manage it, given that stopping carries its own consequences — worse glycemic control for patients taking it for type 2 diabetes, and a period of appetite rebound for everyone.
How risk is assessed now
Instead of one rule for everybody, the current guidance stratifies. The factors that raise concern about delayed gastric emptying are specific and answerable at a pre-operative appointment.
- Whether you are still escalating the dose or holding a steady maintenance dose.
- How high the dose is.
- Whether the formulation is weekly or daily.
- Whether you are having gastrointestinal symptoms — nausea, vomiting, abdominal pain.
- Whether anything else in your history slows gastric emptying.
What happens where risk is elevated
Where that assessment raises a concern, the guidance sets out measures short of cancelling. A liquid diet for at least 24 hours before the procedure is one — the same principle already used before colonoscopy and before bariatric surgery. The anesthetic plan itself can also be adjusted, weighing the benefits and risks of a rapid sequence induction against the alternative of postponing.
Where risk is not elevated, therapy may simply be continued. Where a decision is made to hold, the pattern is the day of surgery for daily formulations and a week beforehand for weekly ones — but that is a decision made about you, not a default.
What to actually do
Tell the team what you take, at what dose, and when you last took it. Say whether you are still increasing the dose. Mention any nausea, vomiting or reflux, even if it seems minor and even if you have got used to it — that symptom history is one of the main inputs to the assessment.
Then let your surgeon and anesthesiologist make the call together. This page exists so you know what questions are being weighed, not so you can pre-empt the answer. Do not stop, start, or change a dose based on anything you read here.
Common questions
So do I stop it or not?
Under current multi-society guidance, most patients continue their GLP-1 before elective surgery. But this is a decision your surgeon and anesthesiologist make together with your specific circumstances in front of them, and it is not one to take from a web page.
My doctor told me to stop a week before. Are they wrong?
Not necessarily. Holding a weekly formulation a week beforehand is exactly what the guidance describes for patients whose risk of delayed gastric emptying is assessed as elevated. What changed in October 2024 is that this is now a judgment made about the individual rather than a blanket instruction for everyone.
Why does it matter for anesthesia at all?
GLP-1 medications slow gastric emptying, which is part of how they work. Under anesthesia, a stomach that still holds contents raises the risk of those contents entering the airway.
What is the 24-hour liquid diet for?
It is one of the measures available where the assessment raises concern about delayed emptying — the same principle already used before colonoscopy and before bariatric surgery. It is an alternative to postponing the procedure, not an extra hurdle.
Does this apply to endoscopy and dental procedures too?
The guidance concerns procedures involving sedation or anesthesia, which includes endoscopy. The safe approach for any procedure is to tell whoever is sedating you what you take and when you last took it, and let them decide whether it matters.
What if I am still increasing my dose?
Say so. Being in the escalation phase rather than on a steady maintenance dose is one of the specific factors the current guidance uses to stratify risk, and it is the sort of detail that does not come up unless you volunteer it.
Medically reviewed by David G. Davtyan, MD, FACS, FICS, FASMBS. Last reviewed August 24, 2026. This page is general information about treatment options and is not medical advice, a dosing instruction, or a substitute for consultation.
