Surgery on a GLP-1: tell anesthesia, do not invent a hold from a 2023 screenshot

Start with the Medication Guide, then call the team

Wegovy’s prescribing information warns that pulmonary aspiration has been reported in patients receiving GLP-1 receptor agonists who undergo elective surgeries or procedures with general anesthesia or deep sedation. Patients are instructed to tell healthcare providers about planned surgeries or procedures. Delayed gastric emptying is also why oral medicines may be absorbed differently.

This page is educational. It cannot clear you for an operation, cannot set NPO hours, and cannot tell you to skip a dose. Beema Health does not manage operating rooms. If your procedure is imminent, the phone number you need is the surgeon or anesthesiologist, not a chat window.

Why the internet still quotes a one-week hold

In June 2023, ASA issued consensus-based guidance because evidence was sparse and case reports of regurgitation and aspiration were concerning. For elective procedures it suggested holding a daily GLP-1 on the day of the procedure and holding a weekly GLP-1 a week before, while using usual fasting rules, and treating emergency cases as full stomach. If GI symptoms were severe, delaying elective procedures was suggested.

By October 2024, ASA and several GI and bariatric societies published unified guidance that moved away from a blanket hold. Their public summary states that most patients should continue GLP-1 receptor agonists before elective surgery, with extra steps for people at higher risk of delayed emptying (including those still titrating, on higher doses, or with GI symptoms). Tools can include a 24-hour liquid diet, changing the anesthesia plan, point-of-care gastric ultrasound, and, rarely, delay. Shared decision-making is the point.

If your surgeon’s handout still says “hold for a week,” that may be their protocol. Follow the team doing the case, not the newest article you like better. Guidelines inform clinicians; they do not let patients outvote the anesthesiologist on the day of surgery.

Factors teams often treat as higher risk

The 2024 multi-society guidance highlights the escalation (titration) phase, higher doses, longer-acting products, and symptoms of delayed emptying such as nausea, vomiting, abdominal distension, or bloating. Residual gastric contents on the day of surgery change the plan. None of those factors is a self-score you should use to cancel your own case without calling.

Older adults, people with gastroparesis, and people who recently increased their dose deserve an especially explicit mention on the pre-op form. Wegovy is not recommended in severe gastroparesis. If that is your diagnosis, surgery planning is already specialized.

• List the exact product, dose, and last injection date.
• Report GI symptoms honestly; they predict residual contents.
• Do not hide the medicine to avoid a delay.
• Urgent surgery proceeds with full-stomach precautions rather than waiting a week.

Diabetes, missed doses, and restarting

People using GLP-1s for type 2 diabetes cannot treat a hold as a vacation. Glucose can rise. The diabetes clinician may need a bridging plan. Restarting after a pause may require re-titration if you were off long enough; that is a prescriber decision. See stopping-GLP-1 education for why appetite can rebound. Do not “catch up” with two injections.

Alcohol the night before anesthesia is a separate aspiration and bleeding problem. See the alcohol article. Follow the NPO rules you were given.

What you can do without guessing a hold

Put the GLP-1 on every pre-op form. Bring the pen or carton to the pre-admission visit. Ask, in writing if needed, whether they want a liquid diet day, a hold, or continuation. Ask who to call if you have vomiting the day before.

If you travel to the surgical center, storage rules still apply to unused pens. See the travel articles. A hotel mini-fridge is not an excuse to skip telling anesthesia.

Frequently asked questions

Sources

1. [1] Wegovy (semaglutide) prescribing information. Novo Nordisk. Pulmonary aspiration during general anesthesia or deep sedation; delayed gastric emptying.
2. [2] Zepbound (tirzepatide) prescribing information. Eli Lilly. Delayed gastric emptying and peri-procedure counseling themes in the class.
3. [3] Ozempic (semaglutide) prescribing information. Novo Nordisk. Delayed gastric emptying; instruct patients to inform providers of planned surgeries.
4. [4] American Society of Anesthesiologists. Consensus-based guidance on preoperative management of patients on GLP-1 receptor agonists (June 2023).
5. [5] American Society of Anesthesiologists. New multi-society GLP-1 clinical practice guidance (October 2024).
6. [6] Joshi GP, LaMasters T, Kindel TL. Preprocedure care of patients on glucagon-like peptide-1 receptor agonists: a multisociety clinical practice guidance. Anesthesiology. 2024.