How long does Wegovy treatment last, and what happens at each stage?

Phase 1: titration (roughly weeks 1–16)

Treatment begins at 0.25 mg once weekly. This starting dose is not intended to produce weight loss — its job is to let your body adjust gradually, reducing the chance of nausea or other gastrointestinal discomfort that can come with the medicine. After four weeks the dose typically steps to 0.5 mg, then 1.0 mg, then 1.7 mg, with each increase roughly a month apart. Most people reach the 2.4 mg maintenance dose around week 16 or 17. Some find they need an extra four weeks at a particular level before moving up, that is not a setback, just a sign that a slower pace suits them, and it is always a conversation to have with your prescriber rather than a self-managed decision.

During this phase you may notice appetite changes and some early weight shift, though the larger changes tend to come once you settle on the maintenance dose. The factors that affect how quickly Wegovy starts working are worth reading alongside this, because the titration window and the onset of meaningful results are related but not identical.

Phase 2: maintenance and the bulk of weight loss (roughly months 4–18)

Once you are on 2.4 mg, the treatment enters its most active period. The STEP 1 clinical trial (68 weeks, 2.4 mg versus placebo, published in the New England Journal of Medicine) recorded around 15% average body-weight reduction. Most of that loss accumulated during the first year of treatment. Weight reduction tends to slow and eventually plateau as the body reaches a new equilibrium; that plateau is expected and does not mean the medicine has stopped working.

Privately prescribed Wegovy through a GPhC-registered pharmacy like ours has no automatic two-year ceiling. Your prescriber reviews the clinical picture at every repeat: whether results are continuing, whether side effects are manageable, and whether the balance of benefit still makes sense for you. The review at six months on maintenance dose matters especially. If weight loss has not reached 5% by that point, the guidance from NICE's appraisal of semaglutide (TA875) is to reconsider continuing, and an honest prescriber will have that conversation with you directly.

Curious how the speed of loss varies from person to person? The page on how fast Wegovy weight loss typically is goes into that in more detail.

Phase 3: the longer-term picture and stopping

What happens when treatment ends is one of the most common questions prescribers hear. The evidence is clear that stopping semaglutide generally leads to partial weight regain over time, because the medicine was managing an ongoing physiological process rather than curing an underlying condition. For many people that means treatment is genuinely long-term, continued for years rather than months, with regular clinical reassessment.

If you and your prescriber decide to stop, the approach is typically a conversation about lifestyle consolidation and whether alternative support is appropriate. There is no standard tapering schedule required under the licence; the prescriber's judgement applies. For context on how long the medicine itself remains active in the body after the last dose, the clearance timeline for semaglutide explains what to expect physiologically.

Planning alongside treatment matters too. Questions about realistic timelines for weight loss on Wegovy are best framed against the full treatment arc rather than the first few weeks alone.

How the NHS two-year rule fits into this

On the NHS, NICE's recommendation (TA875) states that Wegovy should be used for a maximum of two years, within a specialist weight management service that includes multidisciplinary support. That ceiling reflects NHS resource considerations as much as clinical ones. Privately, the picture is different: duration is determined by clinical need, not a policy cap, as long as treatment continues to be appropriate and safe for you.

For an overview of what Wegovy treatment involves from start to finish (including eligibility and the private versus NHS routes) the Wegovy treatment guide covers the full picture. If cost across a longer treatment period is something you are thinking through, the Wegovy cost and pricing page sets out what private treatment typically involves financially, without hiding the real numbers. A free consultation with our prescribers is the right starting point if you want a view on your own timeline specifically. Every patient's situation is reviewed individually, a free consultation is always the first step.