How Long Do You Have to Use Wegovy — and What Happens When You Stop?

What the STEP trials tell us about how long results take to build

The landmark STEP 1 trial, published in the New England Journal of Medicine, ran for 68 weeks and found an average body-weight reduction of around 15% at the 2.4 mg maintenance dose of semaglutide. That figure matters for this question because 68 weeks is roughly 16 months, which tells you something important: meaningful weight loss with Wegovy is not a six-week event. The dose escalation phase alone takes about five months, moving from 0.25 mg up through 0.5, 1.0 and 1.7 mg before reaching 2.4 mg. Weight loss then continues to accumulate as your body adjusts.

This gradual build is why many people feel disappointed early on. The first pen's job is to settle your system, not to produce dramatic results. A question our prescribers hear most weeks is whether slow progress in month two means the medicine is not working, usually, it simply means the dose is still climbing. The full picture only becomes clear once you have been on the maintenance dose for several months, which is why the six-month review is the first real checkpoint rather than the finish line.

If the new 7.2 mg dose is relevant to your situation, the Wegovy treatment overview sets out what is currently known about that higher-dose option and how it compares.

The six-month rule and what it means for continuing treatment

NICE's appraisal of semaglutide (TA875) is explicit on this point: if a patient has not lost at least 5% of their starting body weight after six months on the maintenance dose, continuing treatment should be reviewed. That threshold is not a punishment, it reflects the clinical reality that the medicine works well for most people but not for everyone, and exposing someone to ongoing side effects and cost without meaningful benefit is not good medicine.

For those who do respond well, NICE recommends semaglutide within NHS specialist services for a maximum of two years. This two-year ceiling applies specifically to the NHS pathway, where treatment sits within a multidisciplinary specialist weight management programme. Private prescribing follows the licensed indication, which does not impose the same hard stop, but a responsible prescriber will still discuss whether continued use remains appropriate as time goes on.

How long you personally need to stay on Wegovy is not something a general page can answer. It depends on how much weight you have lost, whether any weight-related conditions have improved, how you have tolerated the medicine, and your broader health goals. That conversation belongs with a clinician who knows your case, not with a website. You can explore the question of staying on Wegovy longer term in more detail if you want a fuller picture before speaking to a prescriber.

What happens to weight when you stop Wegovy

This is the part that catches many people off guard. A follow-up to the STEP 1 trial, known as STEP 4, found that participants who stopped semaglutide after 20 weeks regained most of the weight they had lost within the following year, while those who continued lost significantly more. The biology explains why: semaglutide works partly by reducing appetite signals. When the medicine is withdrawn, those signals return. For most people, weight regain is not a sign of failure, it is the expected physiological response to stopping a medicine that was actively doing something.

This does not mean you will be on Wegovy forever. Some people make lasting changes to eating habits and activity levels during treatment that help them maintain some of the benefit after stopping. Others may find that the medicine needs to continue for their weight to stay stable. Neither outcome is wrong, they reflect different bodies, different starting points and different lives. The timeline for Wegovy taking effect is a related question worth reading before you make any decisions about stopping. And if you are thinking about the cost of a longer course of treatment, the Wegovy cost page sets out what private pricing typically involves.

Stopping abruptly versus tapering is a question for your prescriber. The Patient Information Leaflet and your clinician's guidance take precedence over anything you read online, including this page. If your treatment is managed through nume, our clinical team is available seven days a week if questions come up between scheduled reviews.

How to think about duration before you start

Going into treatment with realistic expectations about timescale makes a real difference. Wegovy is not a short course, and it is not designed to be. The people who get most from it tend to be those who approach it as a medium-to-long-term intervention alongside genuine changes to food and movement, not as a reset button with a defined end date. That framing also matters for cost planning: a treatment that runs for a year or more is a different financial commitment from a one-month prescription.

The upper limits of Wegovy use and the minimum period before results become visible are both worth reading if you are still at the decision-making stage. When you are ready to speak to someone, checking your eligibility with our prescribers costs nothing and takes a few minutes. Every review at nume is done by a GPhC-registered Independent Prescriber (a real clinician reads your answers) and treatment, if appropriate, is dispatched the same day you are approved.