Does Wegovy work better than Ozempic for weight loss?

The biggest misconception: Ozempic is not the weight-loss version of this drug

Most people asking whether Wegovy works better than Ozempic are operating under a reasonable assumption: that both are simply different-strength versions of the same thing, and the higher-dose one wins. The assumption is understandable, but the picture is more complicated.

Ozempic and Wegovy both contain semaglutide, a GLP-1 receptor agonist that slows stomach emptying and reduces appetite. The chemistry is identical. What differs is the dose ceiling and, critically, the licence. Ozempic is approved by the MHRA for type 2 diabetes management, at doses up to 1mg weekly. Wegovy is approved for weight management, starting at 0.25mg and titrated up to a 2.4mg maintenance dose, and since January 2026, with the option of a 7.2mg maximum dose for eligible adults with obesity. That higher dose ceiling explains most of the weight-loss difference you'll read about online.

Because the licensed indications are separate, comparing them as if they compete for the same patient is a category error. The NHS's semaglutide pages are clear that Ozempic is a diabetes medicine; weight-loss readers are directed to Wegovy, not to Ozempic at a higher dose. If you want a thorough look at whether Wegovy is better than Ozempic for weight management, that page covers the licences, doses, and trial evidence in detail. Prescribing Ozempic off-label for weight loss is a clinical decision for a specialist setting, it is not a route available through a licensed weight-management service, including ours.

What the trial data shows for Wegovy's weight-loss dose

The weight-loss evidence for Wegovy at its licensed doses is substantial. In the STEP 1 trial (68 weeks, adults with obesity or overweight and at least one weight-related condition, without diabetes) participants on 2.4mg semaglutide achieved an average body-weight reduction of around 15%, compared with roughly 2.4% on placebo, alongside lifestyle changes. That result is published in the New England Journal of Medicine and forms the foundation of NICE's recommendation for Wegovy under technology appraisal TA875.

The newer 7.2mg dose, approved by the MHRA in January 2026 and available as a dedicated single-dose pen from April 2026, produced around 20.7% average weight reduction over 72 weeks in trials. That narrows the gap with tirzepatide 15mg considerably. Whether 7.2mg is appropriate for a given patient is a prescriber-level decision taken after reviewing dose history and tolerance.

Ozempic at its licensed 1mg ceiling was not designed or studied for weight management at the same scale. Its trial programme focused on glycaemic control and cardiovascular outcomes in people with type 2 diabetes. For anyone wondering whether semaglutide is better than Ozempic as a general question, it helps to understand that semaglutide is the active ingredient in both, and what actually differs between them is the licensed indication and dose ceiling, not the molecule itself.

What is actually licensed for weight loss in the UK, and what nume can help with

Two medicines hold a UK licence for weight management in adults: semaglutide under the Wegovy brand, and tirzepatide under the Mounjaro brand. Tirzepatide activates both GIP and GLP-1 receptors, a dual mechanism that, in the SURMOUNT-5 head-to-head trial published in 2025, produced greater average weight reduction than semaglutide 2.4mg over 72 weeks. You can read a fuller breakdown on our page comparing the licensed options if that question is where you're heading.

Wegovy as a licensed weight-loss medicine is explained in detail on our Wegovy overview page, including how the titration schedule works and what the eligibility criteria look like. The Wegovy vs Ozempic comparison covers the licensing distinction in more depth if you want a side-by-side read. Our page on whether Wegovy is better than semaglutide is worth reading if you have come across unbranded semaglutide and want to understand how it relates to the licensed Wegovy product. A broader look at available treatments is on our weight-loss treatments overview.

Our prescribers (qualified, GPhC-registered Independent Prescribers, not software) can walk through whether Wegovy or Mounjaro is the better fit for your history and goals. One quick check worth doing before going further with any online pharmacy: look them up on the GPhC pharmacy register. A legitimate registered pharmacy will be listed within seconds.

Which medicine suits you is a clinical decision our prescribers make with you. Speak to our prescribers through a free consultation, no referral, no waiting list.