Should You Stop Ozempic Before Surgery? What Patients Need to Know About Anesthesia Safety

By Andrés Jurado, Founder & Director, My Medical Vacations · 16 years coordinating medical travel to Cancun, Mexico · 8,000+ cases coordinated
Published: November 19, 2026 · Last updated: November 19, 2026

Quick answer: Most patients don’t need to stop Ozempic, Wegovy, or Mounjaro before elective surgery. Guidance issued in October 2024 by five medical societies, led by the American Society of Anesthesiologists, says most people can continue, while higher-risk patients may follow a 24-hour liquid diet. Never stop on your own; your prescriber and anesthesia team decide.

Key facts

• Most patients can continue GLP-1 medications before elective surgery, per October 2024 multi-society guidance. (American Society of Anesthesiologists)

• The earlier 2023 advice was to hold weekly GLP-1 doses for a week before surgery. (ASA, 2023)

• Ozempic’s FDA label notes “rare postmarketing reports” of pulmonary aspiration during general anesthesia or deep sedation. (FDA prescribing information)

• In a study of 366,476 surgical patients, aspiration pneumonia occurred in 0.7% of GLP-1 users vs. 0.6% of non-users, with no statistically significant difference. (JAMA Network Open)

• About 12% of U.S. adults say they currently take a GLP-1 drug. (KFF, November 2025)

Why do GLP-1 medications matter for anesthesia?

GLP-1 medications matter for anesthesia because they slow how quickly your stomach empties. That’s part of how they reduce appetite, but it also means food can remain in the stomach longer than usual, even after standard fasting. Under general anesthesia or deep sedation, your protective airway reflexes are reduced, so stomach contents could be regurgitated and inhaled into the lungs. This is called pulmonary aspiration.

The FDA prescribing information for Ozempic states that it “delays gastric emptying” and notes rare postmarketing reports of aspiration in patients who had residual stomach contents “despite reported adherence to preoperative fasting recommendations.” The key word is rare, but it’s why your anesthesia team needs to know you’re taking one of these medications.

Ozempic® and Wegovy® are registered trademarks of Novo Nordisk. Mounjaro® and Zepbound® are registered trademarks of Eli Lilly. My Medical Vacations is not affiliated with either company.

How has the guidance changed since 2023?

The guidance shifted from “hold it” to “most patients can continue.” In June 2023, the American Society of Anesthesiologists advised holding daily GLP-1s on the day of surgery and weekly GLP-1s for a week beforehand. In October 2024, the ASA joined the American Gastroenterological Association, 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 in updated guidance.

Who is considered higher risk?

You’re considered higher risk if you’re in the dose-escalation phase or have active gastrointestinal symptoms. According to the 2024 guidance, that includes patients:

1. Still increasing their dose. The escalation phase typically lasts four to eight weeks, and elective procedures may be deferred until it’s complete.

2. Experiencing GI symptoms such as nausea, vomiting, abdominal pain, or constipation.

3. Experiencing shortness of breath or other symptoms your team flags.

Your anesthesiologist may also use point-of-care ultrasound right before the procedure to check whether your stomach is empty.

What does the research show about aspiration risk?

The research shows GLP-1 users are more likely to have food left in the stomach, but serious aspiration appears uncommon. A 2023 study in the Journal of Clinical Anesthesia found increased residual gastric content in 24.2% of semaglutide users undergoing upper endoscopy, compared with 5.1% of non-users, despite standard fasting.

On the other hand, a large JAMA Network Open study of 366,476 patients having common surgical procedures found postoperative aspiration pneumonia in 0.7% of GLP-1 users and 0.6% of non-users, a difference that wasn’t statistically significant. Together, these findings explain today’s approach: the risk is real enough to plan for, but manageable with the right precautions rather than routine discontinuation.

What will your anesthesia team likely ask you to do?

Your anesthesia team will most likely ask you to disclose your medication, report any GI symptoms, and possibly follow a longer liquid-only period. The ASA’s patient guidance explains that you may be asked to avoid solid food for 24 hours before surgery, with clear liquids allowed during most of that period until two hours before.

Practical steps:

• Tell every member of your team, including the surgeon and anesthesiologist, the exact medication, dose, and day you inject.

• Report nausea, vomiting, bloating, or constipation in the days before surgery.

• Follow your team’s diet instructions exactly, even if they differ from what a friend was told.

• Don’t stop or skip doses unless your prescriber tells you to.

What if you take a GLP-1 for diabetes?

If you take a GLP-1 for type 2 diabetes, stopping it without a plan can affect your blood sugar control, which also matters for surgical safety and healing. That’s one reason current guidance favors continuing the medication for most patients. Your prescriber and anesthesia team may adjust your diabetes plan around surgery, but that decision should always be coordinated between them.

What to ask any surgeon and anesthesiologist before surgery if you take a GLP-1

1. Do you want me to continue, hold, or adjust my GLP-1, and have you coordinated that with my prescriber?

2. Do I need a 24-hour liquid diet before surgery?

3. Should I schedule surgery around my injection day?

4. Am I still in the escalation phase, and should we wait?

5. Will you use gastric ultrasound on the day of surgery?

6. What happens if I have nausea or bloating in the days before surgery?

7. Who will be my anesthesiologist, and are they board-certified?

How does surgery in Cancun work for U.S. and Canadian patients on GLP-1 medications?

1. Medication review during case evaluation. We ask for your medication, dose, injection day, and how long you’ve been on your current dose.

2. Timing check. If you’re still escalating or losing weight quickly, we’ll discuss waiting.

3. Pre-operative clearance, with your anesthesia team reviewing your GLP-1 use and giving you written diet instructions.

4. Surgery and local recovery, with your team monitoring you closely.

5. Remote follow-up after you’re home.

At My Medical Vacations, we don’t operate on anyone. We’re an independent coordinator: we evaluate your case, match you with a board-certified specialist, and manage the full journey with bilingual nursing support before, during, and after surgery. In 16 years and 8,000+ coordinated cases, we’ve learned that complete medication disclosure is one of the simplest safety steps.

Frequently asked questions

Do I have to stop Ozempic before surgery? Usually not. Current multi-society guidance says most patients can continue. Your anesthesia team and prescriber make the final decision.

What is the 24-hour liquid diet? Some patients are asked to avoid solid food for 24 hours before surgery, drinking clear liquids until about two hours before.

Why is Ozempic a concern for anesthesia? It slows stomach emptying, so food may remain in the stomach longer, raising the rare risk of aspiration under anesthesia.

Does this apply to Mounjaro, Zepbound, and Wegovy too? Yes. The guidance covers GLP-1 receptor agonists broadly. Always tell your team exactly which medication and dose you take.

What if I just started my GLP-1? If you’re in the dose-escalation phase, typically four to eight weeks, elective surgery may be deferred until your dose is stable.

Should I skip my injection the week of surgery? Only if your prescriber and anesthesia team tell you to. Don’t change your dose on your own.

Does this guidance apply to cosmetic surgery? Yes. It applies to elective procedures under general anesthesia or deep sedation, including cosmetic surgery.

Get your case evaluated in 36 hours

Tell us about your procedure, your GLP-1 medication, and your dose. Within 36 hours, our team reviews your case in a private WhatsApp group and flags anything your surgical and anesthesia team will need to plan around.

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This article is for educational purposes and is not medical advice. Never stop or change a prescribed medication without talking to your prescribing physician. Always follow the instructions of your surgeon and anesthesia team.