How long should you stay on Wegovy, and what happens when you stop?

You've hit your target weight, so why are prescribers still talking about continuing?

It's a fair question. You've been on Wegovy for several months, your weight has come down to somewhere close to where you wanted it, and stopping feels like the logical next step. But weight management medicine doesn't work the way a course of antibiotics does. Semaglutide reduces appetite partly by acting on GLP-1 receptors in the brain's hunger-regulating circuits. When you stop taking it, those effects don't carry over indefinitely.

The clinical data from the STEP 1 programme, published in the New England Journal of Medicine, included a withdrawal phase. Participants who stopped semaglutide after 68 weeks regained, on average, around two-thirds of the weight they had lost within 52 weeks of stopping. Appetite and metabolic rate largely returned to pre-treatment patterns. This isn't a failure of the person, it reflects the biology of obesity as a chronic condition rather than an episode that gets fixed and ends.

That context matters enormously when you're deciding how long you should be on Wegovy, a question with a more nuanced answer than most people expect. The medicine is treating an ongoing condition, and how long you need it is individual. A quick check that takes under a minute: compare your weight today against your weight from three months ago. Consistent, measurable progress is one of the clearest signals your prescriber will use when reviewing whether to continue.

What UK guidance actually sets as the limit, and what it doesn't

NICE's recommendation for semaglutide (Wegovy) on the NHS places a cap of two years, within a specialist weight management service that provides multidisciplinary support alongside the medicine. This figure, drawn from NICE technology appraisal TA875, reflects the NHS commissioning framework rather than a biological ceiling on how long the medicine is safe or effective. It also applies specifically to NHS provision through specialist services.

The licensed indication itself doesn't carry a fixed stop date. The Wegovy summary of product characteristics describes it as a long-term weight management medicine, used alongside a reduced-calorie diet and increased physical activity. Private prescribers, including those at regulated pharmacies, work to the licence and make individualised clinical decisions at each repeat review.

The review principle that applies across both settings is the 5% threshold: if you haven't lost at least 5% of your starting weight after six months at your highest tolerated maintenance dose, continuing is unlikely to be the right path, and your prescriber will talk you through the options. For those who are responding well, the conversation shifts to what sustainable long-term management looks like, which may mean continued treatment, adjusted goals, or at some point a planned and supervised stop.

If you'd like a clearer sense of how long you should use Wegovy and what that decision involves, that question is worth exploring before your next review.

What happens if you stop, and how to stop safely

Stopping Wegovy abruptly isn't dangerous in the way that stopping some medicines can be, but the rebound trajectory is steep enough that it warrants a plan. Hunger returns. Portion sizes that felt natural on treatment can feel insufficient once semaglutide clears your system over several weeks. People often describe a return to thinking about food more frequently, which was precisely what the medicine had been suppressing.

The NHS England guidance on weight-management injections describes the importance of lifestyle behaviours (nutrition, physical activity, sleep) being well-established before treatment ends, because they become the main support structure once the pharmacological effect fades. This isn't a reason to feel daunted about stopping; it is a reason to stop with intention and with your prescriber's input, rather than simply running out of pens and not reordering.

Planned stopping might mean tapering to a lower dose, setting a review date to check weight and wellbeing, and having a clear plan for what support looks like post-treatment. That conversation is part of what aftercare at a clinician-led service is for. If you want to understand how long you should take Wegovy for, including what factors your prescriber will weigh up, that detail can also inform how you think about the timing of any planned stop, and how long you should take Wegovy is a question our prescribers revisit with you at every review.

For context on how Wegovy is priced as a private treatment, our treatment page has the details that matter most when planning ahead financially.

Having the conversation with your prescriber

How long you should stay on Wegovy isn't a question with a single universal answer, and any source that tells you otherwise is oversimplifying. The factors a prescriber weighs include how much weight you've lost, whether you're still losing, what your weight-related health conditions look like now compared to when you started, how well you're tolerating the medicine, and what your goals for the next twelve months are.

At nume, every repeat order is reviewed by a GPhC-registered prescriber before it's approved, a real clinician reads your answers each time, not an automated system. That structure means the duration question gets revisited regularly rather than defaulting to indefinite continuation without reflection. It also means that if you're approaching a point where stopping might be appropriate, you'll have clinical support in making that decision rather than doing it alone.

The answers to common questions about Wegovy cover a range of practical topics, or you can start a free consultation to speak with our prescribers about your specific situation.