Wegovy® (semaglutide) Injection - How Much Weight Can You Lose?

By 
Dr Amit Kumar Singh
 on 
Aug 28, 2025
 • 
5
 min read

Wegovy has quickly become a key treatment option in obesity management, particularly for adults living with excess weight and health conditions linked to obesity. 

With recent price increases for Mounjaro®, another GLP-1 medication, many patients and healthcare providers are now turning to Wegovy as a strong alternative. 

Clinical research shows that Wegovy can deliver significant weight loss results, often comparable to those seen with Mounjaro, making it one of the most effective options currently available.

Recent news and clinical trial data reveal that higher doses of Wegovy specifically at 7.2 mg weekly, have led to average weight loss of around 21% in adults with obesity, with approximately one-third of participants achieving a weight loss of 25% or more over 72 weeks. This is notably greater than the 15% average weight loss seen at the standard 2.4 mg dose.

Latest Clinical Data on Higher Doses

The 2025 STEP UP phase 3b trial evaluated semaglutide at both 7.2 mg and 2.4 mg weekly doses versus placebo in people with obesity who did not have diabetes. The results indicated a clear dose-response effect:

  • Mean weight loss was 21% at 7.2 mg, compared to 17.5% at 2.4 mg, and much lower with placebo.
  • Specifically, 51% of those on 7.2 mg lost at least 20% of their body weight, and 33% achieved a reduction of 25% or more.
  • For 2.4 mg, 35% lost 20% or more, and 17% achieved 25% or greater weight loss.

Regulatory and Safety Considerations

  • Novo Nordisk has announced plans to seek regulatory approval for the higher 7.2 mg dose in the EU and other regions in late 2025.
  • Safety and tolerability of the 7.2 mg weekly dose were consistent with the known profile of semaglutide, with gastrointestinal side effects remaining most common, except for a low discontinuation rate for adverse effects (about 3%).
  • These findings extend the potential of Wegovy for people requiring greater degrees of weight loss, emphasising the dose-dependent effect of semaglutide GLP-1 therapy.

Comparing New findings with Mounjaro

At higher doses (7.2 mg), Wegovy has demonstrated weight loss outcomes that closely mirror those achieved with Mounjaro. Clinical data show an average 21% reduction in body weight over 72 weeks with Wegovy, with around half of patients reaching at least 20% weight loss. By comparison, Mounjaro studies report average reductions of up to 22–23% at higher doses over a similar treatment duration. While Wegovy’s 7.2 mg dose remains under regulatory review and is not yet standard practice, these findings highlight that patients considering a switch may be able to achieve results that are highly comparable to those seen with Mounjaro, offering another strong option in pharmacological obesity management.

Head-to-head style snapshot (72-week outcomes)

In conclusion, if you are considering switching from Mounjaro to Wegovy, now is an excellent opportunity. Wegovy offers a highly effective alternative for weight management with similar clinical results, and - importantly - comes at a considerably lower price, especially as Mounjaro prices are set to rise sharply in the UK from September 2025. Choosing Wegovy can help maintain your weight loss goals while making your treatment more affordable.

If you have any questions or need personalised advice about making the switch, please do not hesitate to contact the Shemed support team at support@shemed.com.

References 

  • ClinicalTrials.gov. (2024, December 12). A research study to see how semaglutide helps people with excess weight, lose weight (STEP UP) (NCT05646706). U.S. National Library of Medicine. https://clinicaltrials.gov/study/NCT05646706
  • Wilding, J. P. H., Batterham, R. L., Calanna, S., Davies, M., Van Gaal, L. F., Lingvay, I., McGowan, B. M., Rosenstock, J., Tran, M. T., Wadden, T. A., Wharton, S., Yokote, K., Zeuthen, N., Kushner, R. F., & STEP 1 Study Group. (2021). Once-weekly semaglutide in adults with overweight or obesity. The New England Journal of Medicine, 384(11), 989–1002. https://doi.org/10.1056/NEJMoa2032183
  • Jastreboff, A. M., Aronne, L. J., Ahmad, N. N., Wharton, S., Connery, L., Alves, B., Kiyosue, A., Zhang, S., Liu, B., Bunck, M. C., & Wadden, T. A. (2022). Tirzepatide once weekly for the treatment of obesity. The New England Journal of Medicine, 387(3), 205–216. https://doi.org/10.1056/NEJMoa2206038
  • American Diabetes Association (ADA). (2025, June). STEP UP trial: Semaglutide 7.2 mg in adults with obesity without type 2 diabetes [Conference presentation]. ADA 85th Scientific Sessions, Chicago, IL. Retrieved from https://diabetesjournals.org/ (poster abstract ePoster 446-P).
  • Novo Nordisk. (2025, June 9). Semaglutide 7.2 mg shows ~21% weight loss at 72 weeks in STEP UP trial [Press release]. Retrieved from https://www.novonordisk.com/
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