The Wegovy Drug Name Explained: Semaglutide, Its Other Names and What They Mean

The biggest misconception: Wegovy, Ozempic and Rybelsus are not the same medicine

Ask almost anyone who's researched weight-loss injections and they'll have encountered the name Ozempic alongside Wegovy. The misconception is understandable: both contain semaglutide. But the drug name being shared does not make them equivalent. Ozempic is licensed in the UK for type 2 diabetes, not for weight management. Its doses top out at 2mg weekly, and it is prescribed to help control blood glucose in people with a diabetes diagnosis. Wegovy, by contrast, is licensed specifically for weight management, with a maintenance dose of 2.4mg weekly (higher than any Ozempic dose) and now a maximum of 7.2mg for eligible adults following MHRA approval in early 2026.

Rybelsus is the third semaglutide brand. It is an oral tablet, and it is also licensed for type 2 diabetes, at 3mg, 7mg and 14mg doses. It is not a weight-loss medicine and should not be confused with the Wegovy tablet (semaglutide 25mg maintenance dose), which the MHRA approved for weight management on 11 June 2026. The NHS medicines page for semaglutide sets this out plainly. So when someone says "I'm taking semaglutide", the brand name and the dose still matter enormously, the molecule alone doesn't tell you what it's licensed to do at that strength.

The practical upshot: if you see semaglutide offered online without a clear statement of which brand and which licensed indication applies, that is a gap worth questioning. A prescriber will always specify the licensed product.

What the Wegovy drug name tells you about how it works

Semaglutide is a GLP-1 receptor agonist. GLP-1 (glucagon-like peptide-1) is a hormone released naturally in the gut after eating; it signals fullness to the brain, slows the rate at which the stomach empties and plays a role in blood-sugar regulation. Semaglutide mimics this hormone in a modified, long-acting form that remains active for roughly a week, which is why the injection is taken once weekly rather than daily.

In the STEP 1 trial, published in the New England Journal of Medicine, adults taking semaglutide 2.4mg alongside lifestyle changes lost an average of around 15% of their body weight over 68 weeks, compared with around 2.4% in the placebo group. Those numbers come from a rigorously controlled clinical setting; real-world results vary, and a prescriber will always discuss what's realistic for your individual circumstances. For context on how that compares with tirzepatide (the active drug in Mounjaro), you can read about Wegovy as a weight-loss drug in more detail.

The oral Wegovy tablet works through the same semaglutide mechanism but uses a co-formulation with an absorption enhancer called SNAC to make the drug viable when swallowed. In the OASIS 4 trial, participants who stayed fully adherent to the 25mg maintenance tablet lost around 17% of body weight over 64 weeks, a figure worth framing carefully: that was among fully adherent participants, not the trial average. Average weight loss across the full trial population was approximately 13.6%.

Why the drug name appears differently on your prescription and on product packaging

UK prescriptions can be written by the brand name (Wegovy) or by the generic drug name (semaglutide), and a GPhC-registered pharmacist must dispense the appropriate licensed product. On product packaging you'll see both: the brand name prominently, and semaglutide listed as the active substance in the product details. The strength (0.25mg, 0.5mg, 1.0mg, 1.7mg, 2.4mg or 7.2mg for the injection; 1.5mg, 4mg, 9mg or 25mg for the tablet) then tells you exactly where in the titration schedule you are.

People transferring from one provider to another sometimes bring a box that says "semaglutide" without a brand and wonder whether it's equivalent. At nume

At our pharmacy, prescribers check evidence of current treatment and current dose before approving a repeat, it's one of the standard safety steps, not a bureaucratic hurdle. The NICE appraisal of semaglutide for weight management (NICE TA875) discusses the licensed product specifically; eligibility criteria reference Wegovy, not semaglutide as a class.

If you're unsure about the cost side of things (what private treatment typically runs and what an all-in price covers) the Wegovy price comparison guide gives a straightforward breakdown.

The names you might encounter and what they mean for getting treatment

A quick reference, because the terminology gets genuinely tangled. Wegovy injection: semaglutide, licensed for weight management, once weekly, maintenance 2.4mg or up to 7.2mg. Wegovy tablet: semaglutide, licensed for weight management, once daily, maintenance 25mg, the UK's first oral GLP-1 for this indication. Ozempic: semaglutide, licensed for type 2 diabetes only. Rybelsus: oral semaglutide, licensed for type 2 diabetes only, different dose range entirely.

Zepbound (sometimes spotted in searches) is the US brand name for tirzepatide and does not exist as a licensed UK product. In the UK, tirzepatide is sold as Mounjaro. The full guide to semaglutide drug names covers these distinctions if you want the complete picture, and the semaglutide overview goes deeper on the pharmacology.

Getting any of these medicines legally in the UK requires a prescription following a clinical assessment. A question our prescribers hear regularly is whether the brand name on the pack matters once you know the molecule. It does, because each brand carries its own licensed indication, dose schedule and patient information leaflet, and if you want a fuller explanation of how the drug semaglutide is classified and regulated across those brands, that page covers it in detail. If you'd like to talk through which licensed option might suit your situation, you're welcome to start your free consultation with our prescribing team.