The Ozempic 'Rebound Effect' Can Be Explained By Science

When it comes to GLP-1 side effects, examples can range anywhere from digestive symptoms to even the so-called "Ozempic face" phenomenon. Some aren't always directly linked to the medication itself, with the hair loss phenomenon another example many people experience while taking these drugs. Others might occur as rebound effects that develop after people stop taking semaglutide (Ozempic) or other GLP-1s for weight loss. Several studies have even noted the development of rebound weight gain that can occur during GLP-1 cessation.

Rebound weight gain is just as it sounds: Some people can experience an increase in body weight after previously losing it, or a "rebound" effect. Part of this might be related to set point theory, which WebMD describes as a person's body attempting to maintain a certain weight. This can occur with any weight loss method, in which your body might try to fight against the lost number of pounds and cause you to gain some of it back. It's this set point that might explain why up to 95% of people who go on a diet gain weight back, says the Cleveland Clinic.

However, it's thought that taking GLP-1s may temporarily work against your natural set body weight, which only partially explains why some people might lose more weight while taking these drugs compared with other methods. Part of this has to do with the way GLP-1s lower your hunger signals. Nevertheless, rebound weight gain is considered extremely common after people stop taking these medications, with some regaining a large amount of what was originally lost during GLP-1 use. It's generally not advised to stop taking GLP-1s without talking with a doctor first, and rebound weight gain is among some of the concerns with sudden cessation.

GLP-1s can help a person lose weight by reducing hunger signals in the brain, reducing the rate your stomach empties after eating meals, and increasing insulin production from the pancreas. Despite being prescribed GLP-1s for weight loss, there are several reasons why patients might want to stop taking them. One reason could be that you've hit your weight loss goals. Or perhaps the high monthly cost of the medications don't fit your budget. Another common reason is intolerance to side effects, particularly when transitioning to higher doses, as well as lost muscle mass. Once you stop taking GLP-1s, their benefits involving insulin, hunger cues, and stomach emptying all stop, too.

Rebound weight gain from discontinuing GLP-1s seems straightforward, but the issue is much more complex. One 2026 systematic review in eClinicalMedicine looked at data from 48 studies and concluded that participants gained about 60% of weight they lost on GLP-1s within a year of stopping them. Separately, another 2026 systematic review and meta-analysis in the British Medical Journal noted an average of 0.88 pounds regained per month after stopping GLP-1s. What's more, researchers found that rebound weight gain was more dramatic compared with the cessation of other weight loss strategies, such as behavioral modifications.

Still, while several studies back up the likelihood of rebound weight gain from stopping GLP-1 drugs, others suggest such effects may not affect everyone. As one 2025 study in the journal Obesity noted, weight gain was not as dramatic in study participants who discontinued medications compared with data from clinical trials. Therefore, rebound weight gain might not impact every single person who decides to take GLP-1s and then stop them in the future.

The statistics behind rebound weight gain can be disheartening, including weight that comes back after discontinuing expensive GLP-1 drugs. This could all suggest that some people might need to take the medication long-term in order to maintain their weight loss results. Yet there may be ways to combat this rebound effect if you do stop taking GLP-1s. First, it's always a good idea to talk with a healthcare professional before GLP-1 cessation, even if it's due to side effects. They can help provide strategies for life after these weight loss medications to not only help you feel good, but to also help minimize rebound weight gain.

A weight loss plan with GLP-1 drugs like Ozempic always includes recommendations for a healthy diet and exercise to help maximize the results. Just some of these strategies include eating more nutrient-dense foods, being mindful of portion sizes, and continuing an exercise routine. Stress management and getting enough sleep can also help to manage cortisol levels that may contribute to unwanted weight gain.

While rebound weight gain is very much a concern with taking and then stopping GLP-1s, this risk isn't stopping people from trying these drugs for treating overweight and obesity. Not only is it likely that GLP-1s will continue to become more accessible and in different forms, but there are also emerging drugs that could be the next game-changing peptides. Furthermore, there may be some hope for people who do not wish to take GLP-1s long-term, with researchers looking at ways to possibly curb rebound weight gain in clinical trials. There is a lot more information about rebound weight gain scientists are trying to unpack, and it underscores the complexities surrounding both weight loss and GLP-1 medications.