Wegovy before surgery, endoscopy or sedation

Why the anaesthetist needs to know

Anaesthesia and deep sedation can dull the reflexes that protect your airway. Stomach contents entering the lungs cause serious complications. Slower stomach emptying from GLP-1 treatment matters even if you did not inject on the day of the procedure.

The issue also applies to endoscopy and other procedures under deep sedation, as well as major operations. Tell the team at pre-assessment and again if your medicine or dose changes before the appointment. A private weight-management prescription may not show up in hospital records.

Give the details the team needs

Give the brand, active ingredient, dose, usual injection day and the date of your last dose. Say whether you have recently started or moved up a dose. Mention any nausea, vomiting, reflux, bloating or trouble finishing meals. Tell them about diabetes and your other medicines too.

Saying you take a weight-loss injection helps far less than an accurate record. The team may need to know whether you take semaglutide or tirzepatide, and whether you are on a stable maintenance dose or still increasing. Your symptoms and the type of procedure feed into the risk assessment.

Follow your team's plan, with no blanket stop date

UK multidisciplinary consensus published in 2025 supports continuing GLP-1 medicines, with a full risk assessment and steps to reduce aspiration risk. MHRA patient advice also says do not stop prescribed treatment without talking to your doctor. Some older advice online told everyone to stop, and this guidance replaces it.

Your team may still give specific instructions for your procedure and health. Follow their plan, including fasting and any diet preparation. Do not fast for longer or start a liquid diet on your own, especially if you take diabetes medicines.

If the procedure is urgent

If a planned appointment is close and you have no instructions, contact the pre-assessment team. Do not guess from a leaflet from another hospital or another country. If different clinicians give you conflicting advice, ask for the plan in writing.

Restarting and recovery

After a procedure, nausea, eating and drinking less, bowel changes and diabetes treatment all affect when you take the next injection. Confirm when to restart and whether a longer break means a lower dose. Your old prescription does not allow for changes after surgery.

Check your discharge record includes the restart plan and your last injection date. If you are not yet eating and drinking normally, contact the team before taking your usual dose. Good coordination avoids needless gaps in treatment and a restart that slows your recovery.