Surgery or Procedure Coming Up?

GLP-1-based medicines, including semaglutide and the dual GIP/GLP-1 medicine tirzepatide, can slow the movement of food out of your stomach. That effect can matter when a procedure uses general anesthesia or deep sedation. If stomach contents come back up and enter the airway or lungs, the result is pulmonary aspiration, a potentially serious complication. FDA-approved labeling for Wegovy states that rare postmarketing aspiration events have been reported in people receiving GLP-1 medicines during elective surgery or procedures involving general anesthesia or deep sedation. Some reports involved residual stomach contents even though the patient said they followed preoperative fasting instructions. The label also says the available evidence is not enough to determine whether changing fasting instructions or temporarily stopping the medicine lowers this risk. That uncertainty is why the useful question is not simply, “Do I stop my GLP-1?” Current U.S. multi-society guidance supports an individualized plan. Many people at lower risk may continue their medicine before an elective procedure, while others may need added precautions. The decision depends on your medication, symptoms, treatment stage, other health conditions, procedure, and anesthesia plan. Your safest first step is early disclosure to the clinicians coordinating your care—not making a medication or fasting change on your own.

Start by identifying exactly what you use. Record the brand and generic name, whether it is a pill or injection, how often you use it, when you last took it, why it was prescribed, and whether the amount or schedule changed recently. Include prescription drugs, over-the-counter medicines, vitamins, herbs, and supplements. MedlinePlus recommends keeping a written medication list and bringing it to medical visits or hospital care. Next, ask what type of anesthesia or sedation is planned. Surgery is not the only setting that matters. Endoscopy, colonoscopy, dental work, imaging, and other procedures may use sedation or anesthesia. The FDA warning specifically addresses general anesthesia and deep sedation, but you should disclose the medicine even when you expect to stay awake or receive local anesthesia. Plans can change, and the procedure team still needs a complete medication history. Share the list with the procedural clinician and the person responsible for anesthesia, not only the front desk or scheduling office. If you do not know whether your medicine belongs to the GLP-1 group, ask the prescriber or pharmacist. Do not identify it by the pen color or package appearance. A photo of the prescription label can help, but it should not replace a written list that includes the timing of your most recent dose.

A care team may look more closely at the chance of delayed stomach emptying before an elective procedure. Current multi-society guidance identifies several factors that can raise concern: being early in treatment while the dose is being increased, using a higher dose, having a weekly rather than daily formulation, experiencing gastrointestinal symptoms, or having another condition that can slow stomach emptying. These factors guide a conversation; they do not diagnose a full stomach or automatically cancel a procedure. Report nausea, vomiting, abdominal pain, bloating, indigestion, constipation, feeling unusually full, or trouble keeping food or fluids down. Say when the symptom started, whether it is getting worse, and whether it appeared after a recent treatment change. Do not minimize familiar symptoms because you fear a delay. The anesthesia and procedure teams need an accurate picture to weigh aspiration risk. Also mention a history of gastroparesis or other gastrointestinal motility problems, and any neurologic condition your clinicians have said affects digestion. If you use the medicine for diabetes, make that clear because changing treatment may affect blood glucose management around fasting and surgery. The presence or absence of one symptom cannot settle the question by itself. The goal is a combined assessment of your treatment, symptoms, medical history, and planned level of sedation or anesthesia.

Before the procedure, get one coordinated set of written instructions. The plan should answer four questions: whether the GLP-1-based medicine is continued or held; exactly when food and liquids must stop or change; how diabetes medicines and blood glucose will be managed, if relevant; and when the GLP-1-based medicine can be resumed afterward. Restart instructions may depend on the medicine, the length of interruption, your symptoms, and whether you are eating and drinking normally. Different offices may use different protocols because the evidence is still developing and professional guidance has changed over time. If the surgeon, gastroenterologist, dentist, anesthesia team, and prescribing clinician give conflicting directions, do not choose the instruction that is easiest. Ask the offices to communicate and identify who owns the final peri-procedure plan. The clinician managing anesthesia needs to know what the prescriber recommends, and the prescriber needs to know about any planned interruption. Do not substitute a social-media checklist, an older handout, or another patient’s instructions for your own plan. Do not extend fasting or create a liquid diet without approval; fasting has its own medical and diabetes-related considerations. Bring the written instructions and medication list on the procedure day. When you check in, confirm the last dose, any symptoms, and whether you followed the food-and-drink directions exactly.

When the team believes delayed stomach emptying is more likely, it has several possible ways to reduce risk. The 2024 U.S. multi-society guidance says a liquid-only diet for at least 24 hours may be used when there is concern, similar to preparation used for some colonoscopy and bariatric-surgery patients. That is a clinician-selected option, not a universal instruction to start on your own. The anesthesia team may also adjust how it protects your airway. In some settings, a trained clinician may use point-of-care gastric ultrasound shortly before the procedure to look for stomach contents. The guidance notes that ultrasound use depends on equipment, clinician training, and local practice. If concern remains high, the team may discuss proceeding with added airway precautions or postponing an elective procedure until the risk is lower. A delay is a safety decision, not a punishment, and continuing the medicine is not automatically safer or riskier than holding it. If treatment is interrupted, the team must also consider why you take it. For someone using a GLP-1 medicine for diabetes, a hold can complicate blood glucose management; replacement treatment can add complexity and may carry its own risks. The right balance is made by the prescribing, procedure, and anesthesia teams with you, based on the specific procedure and your current health.

If you accidentally take a dose you were told to hold, eat or drink outside the fasting instructions, or develop new stomach symptoms, contact the procedure team as soon as possible. Give the exact details: what you took or consumed, how much, when, and what symptoms you have. Do not skip the appointment without calling, and do not hide the information to avoid a cancellation. The team may keep the plan, change the anesthesia approach, move the procedure, or postpone it after assessing the situation. For urgent or emergency care, do not delay treatment while trying to manage the medication yourself. Tell emergency and anesthesia clinicians the medicine name, your latest dose, when you last ate or drank, and whether you have nausea, vomiting, bloating, abdominal pain, constipation, or unusual fullness. If you cannot speak for yourself, a current medication list on your phone or in your wallet can help. After the procedure, follow the written recovery and medication instructions. Before leaving, clarify who to call if you cannot keep fluids down, have worsening gastrointestinal symptoms, have blood glucose concerns, or are unsure when to resume treatment. The practical takeaway is simple: disclose early, report symptoms honestly, follow the procedure team’s food-and-drink plan exactly, and make medication decisions through a coordinated clinical team.