How much weight can you lose with semaglutide injections — and what does it actually cost?

You have done the research, you know the trial results, now what does a year of treatment actually cost?

Picture the moment most people reach: you have read enough about semaglutide to feel confident it is worth trying, and now you are scanning prices across a handful of websites. The figures vary more than you expected. One lists a price that looks almost too reasonable. Another seems steep. A third offers a discount code in a banner at the top of the page. It is genuinely confusing, and that confusion is worth taking seriously before you hand over your card details.

Private semaglutide treatment in the UK is priced per pen, per month, and the dose you are on makes a significant difference. Because Wegovy is titrated from a low starting point up toward the 2.4mg maintenance dose, the cost is not fixed from day one. Eli Lilly's September 2025 price increase on tirzepatide drew wide attention, but Wegovy's private market pricing also varies considerably by provider and dose. If you want a grounded sense of the landscape, the Wegovy price page sets out what UK private treatment typically costs at each stage, hedged accurately.

The 15% average weight loss figure from STEP 1 is compelling, and results at the newer 7.2mg dose approach 20.7% over 72 weeks according to MHRA approval data. But those outcomes were achieved by participants in structured trials, with consistent clinical oversight throughout. Understanding how much weight you can lose on semaglutide, and what shapes those results for different people, is a question worth exploring before you commit to a course of treatment. The weight-loss question and the cost question are more connected than they look: sustained results depend on staying the course safely, which in turn depends on how well the service behind the prescription actually supports you.

What headline prices often leave out, and why that gap matters

A quoted price that covers only the pen itself is not a complete picture. Some providers charge separately for the initial consultation, the prescription fee, delivery, and any follow-up clinical review before a dose increase. Those additions accumulate over several months. A figure that looked competitive in week one can look quite different by month four.

At nume, one price covers the consultation, the prescription, the treatment and free next-working-day delivery. Your pen arrives in a plain, unbranded box via DPD (you will get a tracking link so you know exactly when to expect it) and there are no line items added at the end. We are deliberately not the cheapest option on the market. That is a choice, not an oversight: it reflects the clinical infrastructure behind each order, including same-day review by a GPhC-registered prescriber, live weight verification, and aftercare from a team available seven days a week.

For a fuller breakdown of what different providers typically include and exclude, the weight-loss injections cost page works through the common gaps in detail. It is worth reading before comparing any two prices side by side.

Why 'cheapest' is the wrong question to ask about a prescription medicine

Semaglutide is a prescription-only medicine. The MHRA has been clear that GLP-1 medicines are not assessed for quick or cosmetic weight loss, and that anyone supplying them without a valid prescription is acting outside the law. The agency has also warned explicitly about fake weight-loss pens circulating online, some of which have contained insulin rather than semaglutide, leading to hospitalisations. You can report a suspect seller or an adverse reaction at the MHRA's Yellow Card scheme.

A discount code attached to a prescription medicine from an unverified seller is a red flag, not a saving. Any pharmacy dispensing Wegovy legitimately must be registered with the GPhC; you can verify any online pharmacy at the GPhC register, where nume's pharmacy is listed under registration number 9012878. The right metric for choosing a provider is not the smallest number, it is whether you will receive a genuine medicine, reviewed and dispensed by qualified clinicians, with support if something does not feel right.

If you want to understand what weight loss with semaglutide looks like in practice, including how individual results differ from trial averages, that is a separate and important question, and one our prescribers are well placed to discuss with you during your consultation. The Wegovy overview page also covers eligibility and how the treatment works in plain terms.

Treatment is available to adults with a BMI of 30 or above, or 27 or above alongside a weight-related condition such as high blood pressure, high cholesterol or type 2 diabetes; lower thresholds apply for some ethnic backgrounds under UK guidance. A prescriber assesses the full picture, a BMI figure alone never guarantees suitability. If you are weighing up whether semaglutide or another licensed treatment is the better fit, and want to know how much you can realistically lose on semaglutide compared with other options, the weight-loss treatment overview outlines the options clearly. And if you have already started elsewhere and are considering a switch, including whether a cheaper version of Wegovy might be available to you, the FAQs page answers the most common questions about transferring care.