How much weight can you lose on Wegovy in your first month — and what shapes that number?

Step 1: understand what the first month's dose is actually doing

When you begin Wegovy, the first pen delivers 0.25 mg of semaglutide once a week. That dose exists specifically to let your body adjust gradually, reducing the nausea and digestive discomfort that can come with GLP-1 medicines. It is not the dose the STEP 1 clinical trial used to produce its headline results. In that trial, published in the New England Journal of Medicine, participants reached the 2.4 mg maintenance dose over several months of careful titration, and average weight reduction of around 15% was measured at 68 weeks, not at four weeks.

So how much weight do you lose on Wegovy in the first month? Realistically, somewhere between 1 and 3 kg for most people, driven partly by appetite reduction and partly by early fluid shifts, and our page on how much you lose on Wegovy in the first month walks through the typical pattern in more detail. Some people lose more; others see very little movement on the scale in week one or two before appetite changes become noticeable. A practical habit worth building: weigh yourself once a week, at the same time of day, on the same scales. Single weigh-ins can mislead; a four-week trend tells you far more. For a week-by-week breakdown of what the early weeks typically look like, this page on the first week of Wegovy is a useful companion.

The NHS's guidance on semaglutide is clear that results depend on diet and activity changes running alongside treatment, the medicine works with those efforts, not instead of them. The NHS semaglutide medicines page gives a solid grounding in how the medicine works and what to expect.

Step 2: read UK private pricing carefully before you commit

UK private weight-loss treatment is priced per pen or per month, and the numbers have shifted considerably. Following Eli Lilly's list-price changes in September 2025, private Mounjaro pricing rose sharply; Wegovy pricing sits in its own range and varies by dose and provider. If you want a clear breakdown of what injections cost across the private market, our page covering Wegovy shots price explains what drives the variation by dose and provider. Across the private market, monthly costs have typically fallen somewhere between £149 and £375, depending on the medicine, the dose and the provider, though those figures are widely reported and can shift.

The headline figure you see advertised does not always tell the whole story. Some providers charge separately for the initial consultation, for the prescription, for delivery, or for any clinical review at dose-increase points. A monthly pen price quoted without those elements can look attractive and then grow once you add the extras. Before committing to any private provider, it is worth spending sixty seconds checking whether the pharmacy is registered: the GPhC online register lets you search by name or registration number and confirm in moments whether a pharmacy is properly regulated. That check matters more than the headline price.

For more detail on how Wegovy costs are structured across the private market, our Wegovy pricing page breaks down what drives the variation.

Step 3: consider what a transparent all-inclusive price actually means

At nume, one price covers the clinical consultation, the prescription, the medicine itself, and free next-working-day delivery through DPD. Aftercare is available seven days a week. There are no subscription charges and no auto-renewals; every repeat order goes through a fresh clinical review by a GPhC-registered prescriber, a real person, not an automated system. Our GPhC premises registration is 9012878, verifiable directly at the GPhC register.

We are not the cheapest option in the private market. That is a deliberate choice. The cost of a prescription medicine is the wrong thing to minimise when what you are actually buying is clinical safety: proper identity checks, live weight verification, a prescriber who reviews your full picture, and a supply chain that runs through licensed UK wholesalers. More about how nume operates is on our about page if you want to read into the detail before starting.

Current treatment pricing is shown on the weight-loss treatments page, alongside the consultation process. If Wegovy is not the right fit clinically, our prescribers can discuss alternatives, you can also explore the broader weight-loss treatment options available through nume.

Step 4: place the first month's results in the full picture before deciding anything

People sometimes feel discouraged if the first month does not produce dramatic weight loss, and occasionally consider switching providers or stopping altogether. It is worth pausing before doing either. The dose at month one is the adjustment dose. The STEP 1 trial's significant results emerged over more than a year of treatment at therapeutic doses, not in the first four weeks. Consistent, gradual weight loss across many months is both safer and more likely to be sustained than a rapid early drop.

NICE recommends semaglutide (under TA875) within specialist weight management services for eligible adults. If weight loss is less than 5% after six months at the maintenance dose, continuing treatment is reviewed clinically. That threshold exists because the medicine is assessed on meaningful, sustained outcomes, not on month-one numbers. You can read NICE's full recommendation at NICE TA875.

For a month-by-month look at what the evidence suggests across the full treatment course, this breakdown of Wegovy results by month is worth reading before you start, and if you want to understand specifically how much weight loss to expect in the first month on Wegovy, that page sets realistic expectations based on the clinical evidence. And if you are ready to speak to a prescriber about whether Wegovy suits your situation, start your free consultation with our clinical team today.