How long can you stay on Wegovy for weight loss?

The misconception: Wegovy is a short course you finish and move on from

Many people assume weight-loss injections work like antibiotics, a defined course, then done. That is not how semaglutide works in practice, and it is not how the clinical trials were designed. The STEP 1 trial, published in the New England Journal of Medicine, ran for 68 weeks and found average body-weight reductions of around 15% at the 2.4mg maintenance dose. Crucially, a follow-up study found that participants who stopped semaglutide regained most of that weight within a year, their biology hadn't changed, only the treatment had stopped.

This matters when you are deciding how long to take Wegovy. It is not a question of reaching a target and walking away. For most people it is more like treating any chronic condition: the medicine works while you take it, and stopping is a decision made with a prescriber rather than a point on a calendar.

That does not mean everyone stays on it indefinitely. It means the right duration is individual, not preset.

What NICE says, and why the two-year NHS figure is often misunderstood

NICE recommended semaglutide (Wegovy) for weight management in England in March 2023 (TA875), but with specific conditions attached. On the NHS it is available for a maximum of two years, and only within specialist weight management services that provide full multidisciplinary support including dietary guidance and behaviour change. The eligibility thresholds sit at a BMI of 35 or above with at least one weight-related condition, though lower BMI thresholds apply for some ethnic backgrounds under UK guidance.

The two-year cap is an NHS commissioning decision, not a medical verdict that semaglutide becomes harmful or ineffective after 730 days. Private prescribing operates under the medicine's licence rather than NHS commissioning guidance, so the duration conversation looks different, though the six-month efficacy check (less than 5% weight loss at maintenance dose suggests the treatment is not working as hoped) applies regardless of who is prescribing.

For a fuller overview of the treatment itself, the Wegovy treatment page covers how semaglutide works and what the licensed schedule looks like.

How prescribers actually decide how long you stay on treatment

Three things shape the decision in practice: whether the medicine is working, whether you are tolerating it, and whether the health benefits justify continuing. Prescribers look at weight response over time, any side effects, and changes in the conditions that originally justified treatment, blood pressure, blood-sugar control, sleep apnoea and so on.

The NICE appraisal of semaglutide (TA875) is worth reading for context: it frames Wegovy not as a quick fix but as a treatment to support meaningful, sustained weight loss alongside lifestyle change. That framing is why the six-month checkpoint exists, it is a structured moment to ask honestly whether the treatment is earning its place.

If you are thinking about what duration might look like for your situation, the related question of how long people stay on semaglutide broadly may also be useful context. And if you are curious about costs over time, our page on the real cost of Wegovy in the UK breaks down what private treatment typically involves month to month.

What happens when you stop, and who should be involved in that decision

Stopping Wegovy is not something to decide on a Monday morning because the pen feels awkward to fit in a handbag. The evidence consistently shows that appetite returns and weight tends to follow. A 2022 withdrawal study from the STEP programme found participants regained around two-thirds of their lost weight within a year of stopping, not because they failed, but because the appetite-suppressing effect of semaglutide is pharmacological, not permanent.

That said, some people do stop intentionally: they have met their health goals, their prescriber agrees the risk-benefit balance has shifted, or they want to attempt maintenance without medicine. Those are legitimate clinical decisions. They are also decisions for a prescriber, not something to navigate alone.

At nume, every repeat supply is reviewed by a real clinician before it goes out, and that same process applies when someone is thinking about whether and when to come off treatment. If you want to talk through your timeline, speak to our prescribers, there is no charge for the consultation, and no obligation to proceed.