Do you gain the weight back after stopping GLP-1 (Ozempic/Wegovy)?

The clearest answers come from the STEP trials on semaglutide. In STEP 4, a randomized withdrawal study, everyone first took the drug for 20 weeks (a mean 10.6% weight loss) and was then assigned to either continue or switch to placebo. Those who continued lost a further 7.9% by week 68, while those switched to placebo gained 6.9%. The gap was almost 15 percentage points, driven only by whether the injections continued.

The STEP 1 extension followed participants for a year after treatment ended. From a 17.3% weight loss at week 68, 11.6 percentage points returned by week 120, roughly two-thirds of what had been lost. On average participants stayed 5.6% below their starting weight, so not back to square one, but well above the low point. Improvements in blood pressure and blood lipids also drifted back toward baseline.

The mechanism explains the pattern. The drug suppresses appetite and slows gastric emptying for as long as it is taken. When it is stopped, that effect disappears, hunger returns and intake rises. The body does not hold the dampened appetite on its own. The picture is therefore consistent: regain after stopping is the rule rather than the exception, but it is gradual and partial, and how much returns is closely tied to the surrounding habits and environment. Questions about starting, stopping or dosing belong with healthcare, not an app.

Two opposite stories persist. One says the regain proves the medication never worked, or that willpower failed. The other says an injection fixes weight once and for all. Both miss that weight is an ongoing balance, not a one-time fix. The drug changes appetite biology for as long as it is used, but that change does not persist on its own once treatment stops. The incentives pull in different directions: headlines sell dramatic before-and-after images, the manufacturer emphasizes long-term treatment, and parts of diet culture would rather talk about character than biology. Confusing the effect ending with it never having existed is the simplest fallacy of the lot.

The lever that holds weight is the everyday energy balance and your habits, with or without medication. If the scale creeps up after any intervention ends, that is the expected pattern, not a mistake on your part. Knowing your maintenance needs makes it easier to hold a result over time. Anything about starting, stopping or changing the dose of the medication is for your doctor, never a calculator.