Sometimes you have to stop Ozempic and other GLP-1s before surgery, and sometimes you don’t. That decision belongs to your surgical team.
The guidance has changed over the past two years. Older advice told everyone on a weekly GLP-1 like Ozempic to stop about a week before surgery. Newer guidance says many patients can keep taking their medication with the right precautions. Either way, one step stays the same: tell your surgeon and anesthesiologist you take a GLP-1, and follow the instructions they give you.
If you are on Ozempic, Wegovy, Mounjaro, or Zepbound and planning plastic surgery, here is why these medications affect surgical planning, what the current guidance recommends, and what you can expect to be asked to do.
WHY DO OZEMPIC AND OTHER GLP-1S AFFECT SURGERY?
Because they slow how fast your stomach empties. That effect can leave food in your stomach even after the standard pre-surgery fast, which raises the risk of inhaling stomach contents under anesthesia.
GLP-1 medications, formally called glucagon-like peptide-1 receptor agonists, help with weight loss and blood sugar partly through this slower gastric emptying, often called delayed gastric emptying. Day to day, it keeps you feeling full longer. Ozempic is the best known of these drugs, and the same considerations apply whether you take Ozempic, Wegovy, Mounjaro, or Zepbound.
Before general anesthesia, you fast so that your stomach is empty. General anesthesia switches off the reflexes that normally keep food and liquid out of your airway. If the stomach still holds contents, those contents can rise up and be inhaled into the lungs, a complication called pulmonary aspiration. Aspiration is uncommon, but when it happens it can lead to aspiration pneumonia, which is serious.
That is why retained stomach contents matter here, and the delayed gastric emptying from a GLP-1 is not a minor effect. Studies using gastric ultrasound have found that roughly 70 percent of people taking semaglutide, the drug in Ozempic and Wegovy, still had solid food in the stomach after a standard overnight fast, compared with about 10 percent of people not taking Ozempic.
WHAT DOES THE CURRENT GUIDANCE SAY?
Most patients can continue their GLP-1, including Ozempic, before elective surgery rather than stopping by default. That is the conclusion of an October 2024 guideline from the American Society of Anesthesiologists and several other medical societies, based on a systematic review of the research.
Rather than a blanket rule, the guideline focuses on who is at higher risk for a full stomach from delayed gastric emptying. Higher-risk situations include being in the early dose-escalation phase, taking a weekly formulation, being on a higher dose, or having gastrointestinal symptoms like nausea, bloating, or vomiting. If none of those apply to you, you are more likely to be cleared to continue your medication as normal.
For higher-risk patients, the guideline recommends precautions instead of canceling: a clear liquid diet for 24 hours before surgery, an adjusted anesthesia plan, and a quick bedside ultrasound to check whether the stomach is empty before the procedure begins. Surgery is delayed only in the uncommon cases where the risk cannot be brought down.
Practice still varies between surgeons. Some prefer the more conservative approach of holding a weekly GLP-1 for seven days, and certain procedures call for a longer hold. No single rule fits everyone, so your instructions come from your surgical team.
WHICH GLP-1 MEDICATIONS DOES THIS APPLY TO?
All of them. The same gastric-emptying effect runs across the whole class, so the surgical considerations are the same whether your prescription is for diabetes or weight loss. The practical difference is timing. Longer-acting weekly versions stay in your system for days, while shorter-acting daily versions clear faster, which is why holding instructions differ between them.
| Medication | Active drug | How often | Mainly prescribed for |
| Ozempic | semaglutide | Weekly injection | Type 2 diabetes |
| Wegovy | semaglutide | Weekly injection | Weight loss |
| Rybelsus | semaglutide | Daily pill | Type 2 diabetes |
| Mounjaro | tirzepatide | Weekly injection | Type 2 diabetes |
| Zepbound | tirzepatide | Weekly injection | Weight loss |
| Trulicity | dulaglutide | Weekly injection | Type 2 diabetes |
| Victoza | liraglutide | Daily injection | Type 2 diabetes |
| Saxenda | liraglutide | Daily injection | Weight loss |
Mounjaro and Zepbound (tirzepatide) act on a second gut hormone in addition to GLP-1, but they slow gastric emptying the same way, so they are handled like the rest before surgery.
WHAT SHOULD YOU DO BEFORE YOUR PLASTIC SURGERY?
Start by telling your surgical team what you take. Your plastic surgeon and anesthesiologist need to know whether it is Ozempic or another GLP-1, along with the exact dose and the date of your last injection. Bring the name and dose to your consultation rather than trying to remember it on the day.
From there, your instructions might be to continue as usual, to hold your weekly Ozempic dose for several days to a week before surgery, to switch to a liquid diet for 24 hours beforehand, or some combination. Your anesthesia team may also adjust how they manage your airway to lower the risk of aspiration. Whatever they advise, follow it exactly, and never stop or change a prescribed medication on your own without talking to them first. That last point cuts both ways: stopping a diabetes medication without a plan can send your blood sugar in the wrong direction, so the timing has to be coordinated, not improvised.
Keep the issue in proportion. Retained stomach contents are more common on Ozempic and similar GLP-1s, but aspiration itself stays rare, and disclosure and these precautions are what keep it that way. This is a known, well-managed part of surgical care, not a reason to avoid a procedure you want.
WHEN CAN YOU RESTART OZEMPIC AFTER SURGERY?
Your surgeon decides this too, and the usual answer is to wait until you are eating and drinking normally again. There are two reasons to hold off. GLP-1s blunt your appetite and slow your gut, and solid nutrition is what your body uses to heal a surgical wound, so eating well in the first days after a procedure matters more than usual. These medications can also cause nausea, which is harder to manage layered on top of recovery.
For many people that means restarting within a week or two, but it depends on your procedure and how your recovery goes. As with stopping, do not resume on your own schedule without checking first, especially if your recovery includes any restrictions on what you can eat or drink.
TALK TO DR. JAIME SCHWARTZ
If you are taking Ozempic or another GLP-1 and considering plastic surgery, talk it through with a surgeon who handles this routinely. Dr. Jaime Schwartz is a board certified plastic surgeon who will review your full medical picture, including any weight loss medication, and build a safe surgical and anesthesia plan. Schedule a consultation to talk through your options and the right timing.