The short answer: Not always. The current multi-society guidance, released on October 29, 2024, says most patients should continue GLP-1 drugs such as Ozempic before elective surgery. That replaced 2023 advice to skip a weekly dose one week before a procedure. The decision is not yours to make alone: your surgical, anesthesia, and prescribing teams decide together, based on your risk of a slow-emptying stomach.

Why does Ozempic matter for anesthesia?

Ozempic (semaglutide) slows how fast the stomach empties. That is part of how it works. It also means food can still be in the stomach after a normal pre-surgery fast.

Under general anesthesia or deep sedation, the reflexes that protect your airway switch off. Stomach contents can come back up and enter the lungs. Doctors call this pulmonary aspiration. The American Society of Anesthesiologists (ASA) notes it can cause aspiration pneumonia, which can be fatal.

The current Ozempic label now carries a warning on this. Section 5.10 is titled "Pulmonary Aspiration During General Anesthesia or Deep Sedation." It reports "rare postmarketing reports of pulmonary aspiration" in people on GLP-1 drugs who had food left in the stomach "despite reported adherence to preoperative fasting recommendations."

The label does not tell you to stop the drug. It says the available data are "insufficient to inform recommendations" on whether changing the fast or "temporarily discontinuing OZEMPIC" lowers the risk. Its one clear instruction is to tell your healthcare providers about Ozempic before any planned surgery or procedure.

How did the advice change between 2023 and 2024?

The advice reversed. In June 2023, the ASA issued consensus-based guidance that took a cautious, one-rule approach:

  • Weekly drugs (Ozempic is weekly): "consider holding GLP-1 agonists a week prior to the procedure/surgery."
  • Daily drugs: consider holding on the day of the procedure.
  • The advice applied "irrespective of the indication (type 2 diabetes mellitus or weight loss), dose, or the type of procedure/surgery."

In October 2024, five societies published joint clinical practice guidance: the ASA, the American Gastroenterological Association (AGA), the American Society for Metabolic and Bariatric Surgery, the International Society of Perioperative Care of Patients with Obesity, and the Society of American Gastrointestinal and Endoscopic Surgeons. Its headline message is that most patients should keep taking their GLP-1 drug before elective surgery.

The new approach sorts people by risk. People at low risk of delayed stomach emptying can continue the drug. People at higher risk get extra precautions, and a small number have the procedure moved. The AGA states the same guidance covers GI endoscopies as well as surgery.

Many hospitals and surgery centers still use the older one-week rule or their own protocol. Follow the written instructions your own team gives you, and ask if they are unclear.

Who is at higher risk of a full stomach?

The 2024 guidance names four situations that raise the risk:

  • The escalation phase. This is the early period when the dose is stepping up. The ASA says it typically lasts four to eight weeks, and that elective surgery should wait until it has passed and GI side effects have settled. See our Ozempic dosing schedule guide for how the steps work.
  • Active GI symptoms. The ASA lists nausea, vomiting, abdominal pain, shortness of breath, and constipation. People with these symptoms should wait until they clear before elective surgery.
  • A higher dose. Higher doses typically bring more GI side effects.
  • Other conditions that slow the stomach. The ASA gives Parkinson's disease as an example. A history of gastroparesis is worth raising too.

Research supports the symptom link. In a 2023 study of 404 upper endoscopies, 24.2% of people who had used semaglutide in the prior 30 days had increased stomach contents, against 5.1% of non-users. Digestive symptoms before the procedure also predicted a fuller stomach. One aspiration occurred, in the semaglutide group.

That study carries a second lesson. The semaglutide group had stopped the drug about 10 days before the procedure on average, and stomach contents were still raised. Time off the drug did not differ between those with and without retained contents. This is one reason the societies moved away from a simple one-week hold. The study was small (33 semaglutide users) and retrospective, so treat it as a signal.

Does it matter if you take Ozempic for diabetes or for weight loss?

It matters in two ways. Ozempic is approved for type 2 diabetes, and many people also take semaglutide for weight management.

First, stopping has a different cost. The 2024 guidance says the benefit of withholding the drug must be balanced against risks "such as increasing blood sugar levels in those with diabetes." High blood sugar around surgery is its own problem. The 2023 ASA guidance already suggested involving an endocrinologist for bridging treatment if a diabetes patient held the drug longer than the dosing schedule. Our guide on what happens when you stop Ozempic covers the wider effects.

Second, the stomach risk may differ. A 2025 matched case-control study found retained stomach contents in 12.5% of people on GLP-1 therapy at endoscopy, against 1.3% of controls. Among those prescribed it for weight loss the figure was about 23%. Among those prescribed it for diabetes it was 2.6%, which was not a significant difference from controls. This is one retrospective study, so it does not settle the question.

The societies also add a fairness point. Withholding GLP-1 drugs only from people with overweight or obesity "could constitute bias or discrimination and should be avoided."

What is the liquid diet option?

For people at the highest risk, the guidance offers a middle path between stopping the drug and doing nothing. The ASA describes three tools the team can use:

  • A liquid-only diet for 24 hours before surgery.
  • An adjusted anesthesia plan that lowers aspiration risk.
  • Point-of-care ultrasound right before the procedure to check what is in the stomach.

In rare cases, the procedure is delayed until the risk drops. Do not start a liquid diet on your own in place of your team's fasting instructions. Your team sets the fasting rules for your procedure, and people on insulin or sulfonylureas need a plan for low blood sugar.

Bowel prep may help by a similar route. In the 2023 endoscopy study, people who had an upper endoscopy combined with a colonoscopy were less likely to have increased stomach contents. If you have a scope coming up, colonoscopy.md explains how prep and sedation work.

What should you tell the anesthesia team?

Tell them early, ideally when the procedure is booked, and again on the day. The label and both sets of guidance agree on this one step. Useful details to give:

  1. The drug name and your current dose.
  2. The date of your last injection.
  3. When you started, and whether your dose changed in the last few weeks.
  4. Why you take it: type 2 diabetes, weight management, or both.
  5. Any nausea, vomiting, bloating, abdominal pain, or constipation, including on the morning of the procedure.
  6. Other conditions or medicines that slow the stomach.
  7. Other diabetes medicines, especially insulin or a sulfonylurea.

Mention compounded semaglutide and other brands too. The warning applies to GLP-1 receptor agonists as a class. If you forgot to mention Ozempic and realize it on the day, say so before sedation starts. The team has ways to adapt, and the worst outcome is a rescheduled procedure.

Emergency surgery is different. It cannot wait, and anesthesia teams have standard precautions for a patient who may have a full stomach. The societies' guidance is about elective procedures.

The bottom line

Since October 2024, the leading anesthesia, GI, and surgical societies say most people can stay on Ozempic before elective surgery. The older blanket advice to hold a weekly dose for one week no longer reflects their position. Higher-risk people (those early in dose escalation, on higher doses, with GI symptoms, or with other causes of slow stomach emptying) may be given a 24-hour liquid diet, a modified anesthesia plan, a stomach ultrasound, or a later date. The Ozempic label itself says the data cannot yet show which approach works best. Your job is to tell every team involved that you take it, and to follow the plan they agree on.

Last updated: October 2026. This article is for informational purposes only and does not constitute medical advice. Do not stop, skip, or restart Ozempic before a procedure without instructions from your surgical, anesthesia, and prescribing teams.