Key Takeaways
- Mounjaro and Wegovy are the leading weight loss injections in the UK for 2026, with unique benefits and costs.
- Mounjaro offers higher average weight loss but comes at a higher price, especially after the 2025 price increase.
- Wegovy’s new 7.2mg dose narrows the effectiveness gap at a more accessible cost for most people.
- Both medications share similar side effect profiles and are well tolerated by most patients.
- NHS access remains limited; private clinics like VIVO Body Studio offer faster, personalised care and ongoing support.
Mounjaro vs Wegovy UK (2026): Cost, Results, Side Effects & Which Is Right for You
Across the UK in 2026, prescriptions for weight loss injections have soared by more than 500%. With so much choice, the decision often comes down to one key question: mounjaro vs wegovy—which is best for you? This in-depth guide compares both options on real-world results, prices, side effects, NHS access, and patient experience, helping you make a confident and informed choice.
What Are Mounjaro and Wegovy?
Obesity rates in the UK continue to climb, and effective treatments are urgently needed. Both Mounjaro and Wegovy are innovative, prescription-only weight loss medications, now licensed for use in the UK (as of 2025–2026). Mounjaro’s active ingredient is tirzepatide (by Eli Lilly), while Wegovy contains semaglutide (by Novo Nordisk). Each is delivered via a once-weekly, self-injectable pen for convenience and simplicity at home or in clinic.
Compared to older weight loss medication, these modern injectables have shown superior results in clinical trials. Both are typically prescribed for those with a BMI of 30+ or 27+ with a weight-related health condition, under ongoing medical supervision.
Learn more about Mounjaro weight loss injections or Wegovy weight loss injection at VIVO Body Studio’s treatment pages.
How Do They Work? The Science Behind the Injections
Understanding how these anti-obesity medications help with weight loss can empower you to make the right choice. Both Mounjaro and Wegovy are GLP-1 receptor agonists, meaning they mimic the action of certain gut hormones that regulate appetite, satiety, and digestion. Wegovy uses semaglutide to mimic the hormone GLP-1, signalling to your brain that you feel full and slowing stomach emptying.
Mounjaro goes a step further—its active ingredient, tirzepatide, activates both the GLP-1 and GIP (glucose-dependent insulinotropic polypeptide) receptors. This dual approach may lead to greater appetite suppression and metabolic effects, explaining its strong clinical performance.SURMOUNT-5 Trial
The bottom line: both medications work by reducing your hunger and helping you stick to a calorie deficit. At VIVO Body Studio, we see patients most successful when these medications are combined with lifestyle changes and clinical support.
Mounjaro vs Wegovy — Weight Loss Results Compared
The surge in interest around mounjaro vs wegovy weight loss is driven by robust data. In the landmark SURMOUNT-5 Trial (NEJM, May 2025), Mounjaro users lost an average of 20.2% of their starting body weight, compared to 13.7% with Wegovy at its standard 2.4mg dose. However, with the MHRA’s new approval of Wegovy 7.2mg in January 2026, the effectiveness gap has significantly narrowed, with the new dose achieving 20.7% weight loss in the STEP UP trial.
Around 45–55% of Mounjaro users reach 20%+ weight loss, compared to 30–35% of Wegovy users. For many, particularly those considering long-term maintenance, this difference can be significant—but is sometimes offset by price or tolerability. Fat freezing offers a non-pharmacological alternative for those unsuited to injectables.
| Mounjaro | Wegovy | |
|---|---|---|
| Active Ingredient | Tirzepatide | Semaglutide |
| Mechanism | GLP-1 + GIP agonist | GLP-1 agonist |
| Average Weight Loss (%) | 20.2% | 13.7% (2.4mg) / 20.7% (7.2mg) |
| Dosage Range | 2.5mg–15mg weekly | 0.25mg–7.2mg weekly |
| Manufacturer | Eli Lilly | Novo Nordisk |
| UK Licence Status | NICE Approved 2025 (TA1026) | NICE Approved 2023 (TA875) |
Curious about how much weight you could lose? Book a consultation with our weight management experts for a personalised plan.
Side Effects — What to Expect from Each
Most people tolerate Mounjaro and Wegovy well, but like all medications, they can cause side effects. The most commonly reported are mild-to-moderate digestive changes: nausea, diarrhoea, vomiting, and constipation. Notably, nausea is more frequently rated as ‘very common’ with Wegovy and as ‘common’ with Mounjaro.
According to pivotal trials, 5.4% of participants stopped Wegovy and 6.2% discontinued Mounjaro due to side effects (SURMOUNT-5, STEP UP), meaning over 93% of patients continued therapy. Symptoms are usually most noticeable in the first few weeks and tend to settle with time—especially when doses are increased gradually with help from a medical team.
At VIVO Body Studio, our clinical support is always on hand to review your progress, adjust your programme, or help you manage any concerns. If you need to change medication or discuss additional strategies, your consultant will guide you through your options.
Mounjaro vs Wegovy Cost UK (2026)
The cost of weight loss injections is a top concern for many people exploring mounjaro vs wegovy cost. After Eli Lilly’s September 2025 price increase, Mounjaro is among the most expensive anti-obesity medications in the UK. Prices now start around £149/month for the lowest dose, rising to £300–£375/month at the full 15mg maintenance dose. Wegovy starts at about £130/month and is capped at about £295/month for the standard 2.4mg maintenance dose, with the new 7.2mg dose available for those seeking higher efficacy.
Annual costs can range from £2,300 to £4,500 depending on the chosen medication and dose. For many, this cumulative difference adds up over time. Following the recent price hike, Wegovy is now the more affordable therapy for most patients achieving similar results, particularly at higher doses.
| Mounjaro | Wegovy | |
|---|---|---|
| Starting Dose (Monthly) | £149 | £130 |
| Maintenance Dose (Monthly) | £300–£375 | £295 (2.4mg), £300 (7.2mg) |
| Annual Cost (Typical Range) | £2,300–£4,500 | £2,200–£3,600 |
| Price Increase (2025) | Up to 170% | N/A |
To discuss your options or get a personalised quote, book a free chat with our team. We’ll help you balance budget and results for your goals.
Mounjaro vs Wegovy: Benefits & Considerations
Benefits
- Neither is a substitute for lasting lifestyle change—support and behaviour change are still key.
- Mounjaro’s recent price hike makes it out of reach for many on a budget.
- Both require ongoing medical supervision and prescription.
- Potential gastrointestinal side effects—though temporary in most cases.
- NHS access limited—most need private prescription for timely treatment.
Considerations
- Neither is a substitute for lasting lifestyle change—support and behaviour change are still key.
- Mounjaro’s recent price hike makes it out of reach for many on a budget.
- Both require ongoing medical supervision and prescription.
- Potential gastrointestinal side effects—though temporary in most cases.
- NHS access limited—most need private prescription for timely treatment.
Can You Get Mounjaro or Wegovy on the NHS?
If you’re exploring mounjaro vs wegovy nhs access, it pays to know the current landscape. Wegovy was NICE-approved for weight management in March 2023 (TA875), but is usually only accessible via specialist Tier 3 or 4 weight loss services—often with waiting lists stretching 6–24 months. Mounjaro received its NICE recommendation for obesity in early 2025 (TA1026) and began restricted NHS rollout for severe cases in June 2025.
At present, NHS criteria for Mounjaro are strict: only those with a BMI of 40+ and four or more weight-related health issues are eligible, with a phased regional rollout over 12 years. For the overwhelming majority, private prescription at a regulated provider like VIVO Body Studio remains the most realistic and immediate route for starting treatment.
To check your eligibility or fast-track access through private care, book a consultation with our clinic team.
Dosage & Injection Schedule — Side by Side
Both Mounjaro and Wegovy are administered as a once-weekly self-injection—easy to fit into your routine with support from your pharmacist or nurse. Dosage is gradually stepped up every four weeks, or adjusted as needed based on your progress and side effect tolerance.
| Wegovy | Mounjaro | |
|---|---|---|
| Starting Dose | 0.25mg | 2.5mg |
| Titration Steps | 0.5mg, 1mg, 1.7mg, 2.4mg, 7.2mg (new) | 5mg, 7.5mg, 10mg, 12.5mg, 15mg |
| Escalation Frequency | Every 4 weeks (or longer if needed) | Every 4 weeks (or longer if needed) |
| Administration | Once weekly, any time of day | Once weekly, any time of day |
You’ll receive full training on your first dose, and our team can help support you through every escalation step. Discover more about weight loss injections UK and injection support services at VIVO.
Who Should Choose Mounjaro? Who Should Choose Wegovy?
Choosing the right medication is a joint decision between you and your clinician, based on your goals, medical history, and budget. Here’s a simple framework often used in clinic to guide the choice.
| Consider Mounjaro If… | Consider Wegovy If… |
|---|---|
| You want maximum average weight loss (in clinical data) | Affordability is important, especially for long-term treatment |
| You have type 2 diabetes with obesity | You value an established safety record and cardiovascular data |
| Your budget allows £300+/month | You’re switching from Mounjaro due to cost or tolerability |
| Other GLP-1 medicines haven’t worked for you | You’re seeking results comparable to Mounjaro but with fewer side effects or lower cost |
We always recommend a tailored medical assessment with one of our VIVO clinicians to ensure safe, evidence-led treatment. Book your consultation today for expert guidance.
Real UK Reviews — What Patients Say About Both Treatments
The most honest comparisons come from real patients. Mounjaro vs Wegovy reviews on UK forums (like Mumsnet and Reddit) highlight unique experiences—especially around appetite changes and side effects. At VIVO Body Studio, hundreds of patients report noticeably reduced ‘food noise,’ better control over cravings, and sustainable weight loss when injections are paired with dietary and lifestyle support.
Results are most pronounced when you combine medication with a structured programme such as Second Nature, as demonstrated in the 2025 JMIR Formative Research study. See more at our patient testimonials page.
Nearly all real-world reviews highlight the importance of regular support from a knowledgeable clinic team—something we prioritise with every weight loss injections UK plan at VIVO.
Most people find success with weight loss injections when combined with regular support and lifestyle change—no medication is a quick fix.
Mounjaro vs Wegovy vs Ozempic — What’s the Difference?
The question ozempic vs mounjaro vs wegovy is common, especially as Ozempic has been highly publicised in the past. The key difference is that Ozempic (also semaglutide) is only licensed for treating type 2 diabetes not for obesity in the UK, according to current MHRA guidance. Wegovy uses a higher dose of semaglutide and is specifically designed for weight loss. Mounjaro (tirzepatide) is similar in injection format but with a dual hormone action. Only Wegovy and Mounjaro are routinely prescribed for weight management at private clinics like VIVO.
| Ozempic | Wegovy | Mounjaro | |
|---|---|---|---|
| Main Use (UK) | Type 2 Diabetes | Obesity/overweight | Obesity/overweight + diabetes |
| Active Ingredient | Semaglutide | Semaglutide | Tirzepatide |
| Approved Dose (Weight Loss) | Not approved | 0.25mg–7.2mg | 2.5mg–15mg |
Have more questions about which medicine is right for you? Our clinicians can help you compare options and choose the best fit for your health.
How to Get Started with Weight Loss Injections at VIVO Body Studio
Ready to start your journey? At VIVO Body Studio, beginning your weight loss injection programme is straightforward and safe. It starts with a free online consultation, followed by a thorough clinical assessment (remote or at one of our multiple UK locations). Your personalised plan could include Mounjaro, Wegovy, or a combination approach, delivered with ongoing support from our GMC-registered clinicians.
You’ll benefit from UK-regulated care, home delivery or in-clinic administration, monthly follow-ups, and a focus on whole-person wellbeing. For those interested in non-injectable options, we also offer fat freezing and tailored nutritional coaching.
Ready to find out which treatment is right for you? Book your free, no-obligation consultation with our clinical team at VIVO Body Studio today.
Frequently Asked Questions
Is Mounjaro better than Wegovy for weight loss?
Clinical trials such as SURMOUNT-5 (NEJM, 2025) show Mounjaro typically results in greater average weight loss compared to Wegovy’s standard dose (20.2% vs 13.7%). However, the new Wegovy 7.2mg dose now delivers comparable results (around 20.7% weight loss), making the two options very similar for most people—especially when considering cost and tolerability. Your clinician can advise which is best for your circumstances.
How much does Mounjaro cost in the UK in 2026?
Mounjaro prices in March 2026 start at around £149 per month for the lowest dose, rising to £300–£375 per month at the full 15mg maintenance dose. This reflects a price increase of up to 170% in late 2025, making Mounjaro one of the most expensive injectable weight loss treatments available in the UK.
How much does Wegovy cost in the UK in 2026?
Wegovy starts at approximately £130 per month for the introductory dose, with the maintenance 2.4mg dose capped at £295 per month. The new Wegovy 7.2mg dose is available for around £300 per month, providing efficacy close to Mounjaro at a more affordable price for most patients.
Can I get Mounjaro or Wegovy on the NHS?
Wegovy is NICE-approved for NHS obesity treatment, but only through specialist Tier 3/4 services, often with long waiting lists. Mounjaro recently began NHS phased rollout for those with BMI 40+ and at least four weight-related conditions. Most people access treatment much faster through a private provider like VIVO Body Studio.
What are the main side effects of Mounjaro vs Wegovy?
Both can cause mild gastrointestinal side effects such as nausea, diarrhoea, vomiting, and constipation. Nausea is slightly more common with Wegovy. Discontinuation rates due to side effects are low—over 93% of users continue therapy with good support. Most symptoms improve as your body adjusts in the first weeks of treatment.
How much weight can I expect to lose on Mounjaro or Wegovy?
Average weight loss in clinical studies is 13–21% with Wegovy (depending on dose) and 20–22.5% with Mounjaro. Many patients find their personal results depend on factors like adherence, dietary support, and ongoing clinical supervision. Both drugs are designed for significant, sustainable weight loss when part of a holistic programme.
Can I switch from Mounjaro to Wegovy?
Yes, some people may switch between medications due to cost, side effects, or clinical advice. Any transition should be overseen by your prescribing clinician to ensure safe dose titration and monitoring of any symptoms. Book a consultation with VIVO Body Studio to discuss your options.
Is Wegovy the same as Ozempic?
Both Wegovy and Ozempic contain semaglutide, but they are licensed for different uses in the UK: Wegovy is intended for obesity/weight management, while Ozempic is authorised only for type 2 diabetes treatment. Wegovy is available in higher doses for weight loss.
Who is eligible for Mounjaro or Wegovy in the UK?
Eligibility typically includes a BMI of 30+ or 27+ with a weight-related health problem. NHS criteria may be more stringent, especially for Mounjaro, while private clinics can offer more flexible and timely access following clinical assessment. Always discuss suitability and safety with a medical professional.
How do I start weight loss injections at VIVO Body Studio?
Starting is simple: complete a free online consultation, followed by a clinical review with our GMC-registered team. We create a tailored plan, arrange prescription and supply, and offer ongoing support—either at home or in-clinic. Book your free consultation now to get started.
