Taking a GLP-1 before surgery

What the labels warn about

GLP-1 drug labels include a warning about pulmonary aspiration during general anesthesia or deep sedation. Aspiration means stomach contents get into the lungs, which can cause serious pneumonia.

The concern is delayed gastric emptying: the stomach may not be empty even after standard fasting times. The labels tell patients to inform their healthcare providers before any planned surgery or procedure.

Tell every member of your team

• Your surgeon or proceduralist when the procedure is booked
• The anesthesia team at your pre-op visit or call
• The nurse who checks you in on the day

Say which drug, the dose, the day you last took it and whether you've had nausea, vomiting or bloating recently.

What anesthesia groups advise

Professional groups led by anesthesiologists published guidance in 2024. In general it suggested that many patients can continue their GLP-1, with extra steps for those at higher risk, such as a liquid diet for 24 hours before the procedure.

Higher risk includes people in the dose-escalation phase, people on higher doses and people with stomach symptoms on the day. Your team decides what applies to you. As of our last review, see the American Society of Anesthesiologists for current statements.

Questions to ask before your procedure

1. Should I hold my weekly or daily dose, and if so, which one?
2. Do I need a clear-liquid diet before, and for how long?
3. What should I do if I feel nauseous or bloated that morning?
4. If I have diabetes, how do I manage blood sugar while doses change?
5. When can I restart, and do I need to step back down the dose after a long gap?

A long gap can mean restarting at a lower dose, per the label. The dose schedule tool shows each drug's steps; read the Zepbound and Wegovy missed-dose pages too.

Keep a medication card

Emergencies don't come with a pre-op visit. A small card in your wallet or a note on your phone's lock screen makes sure any care team knows. Include:

• Drug name, dose and whether it's weekly or daily
• Your usual dose day and the date of your last dose
• Your other medicines, especially insulin or other diabetes drugs
• Your prescriber's name and phone number

Many phones have a built-in medical ID that emergency responders can read from the lock screen. It takes 2 minutes to set up.

The same card helps with dental work under sedation, emergency room visits and any procedure where you'll be asleep.

Colonoscopy and endoscopy

These often use deep sedation. Slower emptying can also leave food in the bowel and make prep less effective. Ask whether you need a longer liquid diet or a different prep plan.

When to call your doctor

• As soon as a procedure with sedation or anesthesia is scheduled
• If you have nausea, vomiting or bloating in the days before
• If you're unsure whether to take your dose that week