What Is Mounjaro and How Does It Compare to Wegovy for Weight Loss?
Weight loss injections have moved from specialist clinics into mainstream conversation remarkably quickly. If you have been researching your options and trying to make sense of the differences between Mounjaro and Wegovy, you are not alone. At Sands Chemists in Wembley, our weight loss service helps eligible patients understand their options clearly and access treatment through a safe, supervised pathway. This guide explains how the two medicines work, how they compare, and what to expect if you decide to explore this route.
How Does Mounjaro Work?
Mounjaro is the brand name for tirzepatide, a medicine that acts on two gut hormone receptors simultaneously — GLP-1 and GIP. This dual mechanism is what distinguishes it from earlier weight loss medicines. By targeting both receptors, Mounjaro reduces appetite, slows gastric emptying, and helps patients feel full more quickly after eating. It is given as a once-weekly injection and has received MHRA approval in the UK for weight management in eligible adults. Clinical trial data showed an average weight reduction of around 20 to 22 per cent of body weight over 72 weeks, though individual results vary considerably.
How Does Wegovy Compare?
Wegovy (semaglutide 2.4mg) is a GLP-1 receptor agonist, meaning it targets a single hormone receptor rather than two. It works through a similar mechanism — reducing appetite and slowing digestion — and is also administered as a once-weekly injection. Clinical trials showed average weight loss of approximately 15 per cent over 68 weeks. You may have also heard of Ozempic, which contains the same active ingredient as Wegovy but at a lower dose licensed for type 2 diabetes. The two are not interchangeable, and the distinction matters clinically.
For patients who prefer a daily rather than weekly injection, Saxenda (liraglutide) is an older GLP-1 medicine that remains a clinically appropriate option for some. Saxenda side effects are broadly similar to those of Wegovy and Mounjaro — nausea, diarrhoea, and constipation being the most commonly reported — though average weight loss outcomes are generally more modest. Your pharmacist will help you understand which option suits your health profile and preferences.
Who Is Eligible for a Weight Loss Injection?
All of the medicines discussed here are prescription-only. They cannot be supplied without a proper clinical assessment, and they are not appropriate for everyone. In line with NICE guidance, eligibility broadly applies to adults with a BMI of 30 or above, or a BMI of 27 or above where at least one weight-related health condition is present, such as high blood pressure or type 2 diabetes.
At Sands Chemists, our weight loss service provides a confidential, medically supervised consultation. Our pharmacists will assess your BMI, medical history, and overall suitability before making any recommendation. We serve patients across Wembley, Brent, Harlesden, Stonebridge, and surrounding areas of north-west London. If you are managing high blood pressure alongside your weight, you may also benefit from our hypertension case-finding service, and a pre-treatment blood panel is available through our phlebotomy service.
If you are ready to explore whether a weight loss injection programme is right for you, speak to our team at Sands Chemists. Your consultation is confidential, and there is no obligation to proceed until you are fully informed.
FAQs
Is Mounjaro better than Wegovy for weight loss?
Clinical trial data suggests Mounjaro produces greater average weight loss, but the right choice depends on your individual health profile, medical history, and how your body responds to treatment. Speak to our team through our weight loss service page for personalised guidance.
Can I get a weight loss injection at a pharmacy?
Yes. Sands Chemists offers a medically supervised weight loss service for eligible patients. A full clinical assessment is required before any prescription-only medicine is recommended or supplied.
What is the difference between Wegovy and Ozempic?
Both contain semaglutide, but at different doses and for different licensed indications. Ozempic is approved for type 2 diabetes at lower doses. Wegovy is specifically licensed for weight management at 2.4mg. They are not clinically interchangeable. Your pharmacist can explain which is relevant to your situation.