You've heard about Wegovy but still have questions — start here

But does it actually produce meaningful weight loss, or is that just marketing?

You've probably seen figures that feel too good to be true, so it's worth going straight to the source. The STEP 1 clinical trial, published in the New England Journal of Medicine, followed adults with obesity over 68 weeks using the 2.4mg maintenance dose alongside lifestyle changes. Average weight reduction was around 15%. That is a meaningful clinical result, enough to reduce blood pressure, improve cholesterol profiles and ease strain on joints in many participants.

The newer 7.2mg dose, approved by the MHRA in April 2026, has produced average losses approaching 20.7% over 72 weeks in trials, narrowing the gap with tirzepatide. Neither figure is a guarantee for any individual (biology, adherence, diet and activity all shape outcomes) but the evidence base is substantial and comes from proper randomised controlled trials, not anecdote. If you want a grounded sense of what the weight-loss trajectory actually looks like over weeks and months, the Wegovy overview page covers the evidence in more detail.

One thing worth knowing: Wegovy is not a quick fix that works in isolation. The licence itself is granted alongside a reduced-calorie diet and increased physical activity. The medicine creates conditions for change; the change still requires the person.

But what about the side effects, are they as bad as people say?

Side effects are the most common reason people hesitate, and they deserve a straight answer rather than reassurance that glosses over them. The most frequently reported effects are gastrointestinal: nausea, loose stools, constipation, indigestion, burping. For many people these are most noticeable in the first days after starting or after a dose increase, and they tend to settle as the body adjusts, often within a couple of weeks. They are unpleasant; they are not, for most people, severe enough to stop treatment.

There are rarer but more serious effects to be aware of. Acute pancreatitis is a known risk with GLP-1 medicines. The MHRA issued specific guidance on this in January 2026: severe, persistent stomach pain that radiates to the back, with or without vomiting, needs urgent medical attention. Gallbladder problems, allergic reactions and (in the context of diabetes) effects on diabetic retinopathy are also listed in the patient information. The NHS medicines page for semaglutide sets out the full side-effect profile clearly and is worth reading before you start.

Practically speaking: if you are on oral contraception, the evidence for reduced pill absorption is stronger for tirzepatide than for semaglutide, but it is still worth discussing contraception with your prescriber before you begin. Pregnancy and breastfeeding are contraindications; Wegovy is not recommended for anyone trying to conceive, and it is not licensed for under-18s.

But how do you actually get it, and is the NHS an option?

This is where many people's research stalls. Wegovy is available on the NHS, but access is tightly defined. NICE's appraisal of semaglutide (TA875) recommends it for adults with a BMI of 35 or above (lower thresholds apply for some ethnic backgrounds) alongside at least one weight-related condition, and only within a specialist weight management service that provides multidisciplinary support. The maximum recommended duration is two years. Waiting lists for those services are often long, and the criteria rule out a large proportion of people who would benefit clinically.

Private prescription is the other legal route, and if you are considering that path, our page on how to buy Wegovy online explains what a legitimate process should look like, including what questions to ask before handing over any personal or payment information. An online pharmacy registered with the GPhC can offer a clinical consultation, and if the prescriber confirms suitability, dispense Wegovy without a GP referral or a waiting list. You can check whether any pharmacy is properly registered in under a minute: search the GPhC pharmacy register by name or registration number before you hand over any personal or payment information. That one habit filters out a large proportion of the unregistered sellers operating online.

For a sense of what private treatment typically costs (and what legitimate pricing includes) the Wegovy cost context page breaks that down honestly. Prices vary by dose and provider; anything that looks dramatically below market should prompt a closer look at who is actually selling it.

But is an online pharmacy actually safe, or is that just convenient?

Scepticism about buying prescription medicines online is healthy, and the MHRA has been explicit about why: fake weight-loss pens have been seized in large quantities across the UK, and some counterfeit products have contained insulin rather than the medicine on the label. The only safe route is a pharmacy you can verify, prescribing after a genuine clinical assessment.

At nume, every consultation is read by a GPhC-registered Independent Prescriber, a real clinician reviews your answers the same day, not software working through a checklist. Identity and weight are verified directly. Medicines come through the licensed UK supply chain, dispensed from our GPhC-registered pharmacy. Some people also notice unexpected body composition changes during treatment, and if you have questions about effects like how Wegovy affects fat distribution around the buttocks, our clinical content covers those topics honestly. If you want to understand the clinical team behind the service, our lead prescriber's profile is there to read.

There is nothing quick or casual about how a prescription-only medicine should be prescribed. The convenience of a private online service sits on top of the same clinical rigour a GP or specialist would apply, it just removes the waiting room. It is also worth knowing that body composition can shift before the scales move, and our page on losing inches but not weight on Wegovy explains why that happens and what to expect. If after reading through everything you think Wegovy might be suitable for you, the right next step is a conversation with a prescriber rather than a purchase. Our Wegovy treatment page gives a full picture of what the process involves before you commit to anything. Speak to our prescribers to start that process at no cost.