The UK's most complete GLP-1 guide
Every Question Answered. Every Side Effect Explained.
- How GLP-1 medications work
- Mounjaro vs Wegovy compared
- Injection instructions
- Side effects & solutions
- What to eat on treatment
- FAQs answered
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Mounjaro 10mg UK Price and How It Compares to Wegovy
Mounjaro 10mg typically costs between £150 and £250 per month in the UK through private prescribing services, though prices vary by provider. If you're considering prescription weight loss treatment, you may be comparing Mounjaro with Wegovy — both are once-weekly injections licensed for weight management in UK adults. Understanding the pricing, mechanism, and effectiveness of each can help you make an informed decision with your prescriber. Both require a clinical assessment before prescription, and costs are similar across comparable dose ranges.
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Enter your height and weight below. Supports both imperial (stone & lbs) and metric (kg). Results include NHS category, healthy weight range, and ethnicity adjustments.
What Is BMI and Why Does It Matter?
Body Mass Index (BMI) is the most widely used screening tool for assessing whether your weight falls within a healthy range. Used by the NHS, GPs, and weight management services across the UK, BMI provides a quick snapshot of your weight relative to your height. The formula is simple: your weight in kilograms divided by your height in metres squared (kg/m²).
While BMI isn't a perfect measure — it doesn't account for muscle mass, bone density, or fat distribution — it remains the standard first step in identifying potential weight-related health risks including type 2 diabetes, cardiovascular disease, high blood pressure, and certain cancers.
The NHS also recommends adjusted thresholds for people of South Asian, Chinese, or Black African heritage — a BMI of 23 or above is classified as overweight, and 27.5 as obese. Our calculator includes this adjustment as a one-click toggle.
Pricing, Mechanisms, and Trial Data Compared
Mounjaro 10mg pricing: Private prescriptions cost approximately £150–£250 per month depending on the provider. A KwikPen containing 4 weekly doses lasts one month. NHS access is available through specialist tier 3 weight management services, though availability varies significantly by region and waiting times can be substantial.
Wegovy pricing: Similar cost range in private settings (£150–£250 monthly). At the Wegovy equivalent dose of approximately 1.7mg (comparable to Mounjaro 10mg), patients are typically in mid-escalation phase.
Key mechanism difference: Mounjaro (tirzepatide) is a dual GIP and GLP-1 receptor agonist, while Wegovy (semaglutide) is a GLP-1 only agonist. This dual action in Mounjaro may contribute to different weight loss outcomes — clinical trials showed Mounjaro users lost an average of 19.5% body weight at 10mg, compared to Wegovy's approximately 15% at maximum dose.
- Both require a prescription and clinical assessment
- Both are self-administered once-weekly injections
- Individual results vary significantly
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How It Works
Three simple steps to understand your weight and take action.
Enter your height and weight in our free calculator. Get your BMI, NHS category, healthy weight range, and ethnicity-adjusted thresholds instantly.
If your BMI suggests you're overweight or obese, explore our GLP-1 calculators to project potential weight loss on Mounjaro or Wegovy.
Use our progress tracker to log your weight weekly, visualise your journey with charts, and stay motivated — all stored privately in your browser.
Free Weight Loss Tools & Guides
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Which Is Right for You? Clinical Assessment and Suitability
Choosing between Mounjaro and Wegovy is a decision made with your GP or prescriber based on your individual health profile, not cost alone. Both are appropriate for UK adults with a BMI of 30 or above, or 27–29.9 with weight-related health conditions (such as type 2 diabetes, high blood pressure, or sleep apnoea). Use our GLP-1 weight loss calculator to explore potential weight loss projections at different doses of either medication.
A prescriber will assess factors including your medical history, current medications, and previous weight management attempts. Some people respond better to one mechanism than the other — clinical trials represent averages, and your personal results may differ. Both medications are used alongside a reduced-calorie diet and increased physical activity for best results.
- Dual GIP/GLP-1 receptor agonist
- Up to 22.5% body weight loss (SURMOUNT-1)
- Weekly injection, dose escalation over 20+ weeks
- Available via private prescription in the UK
- Doses: 2.5mg → 5mg → 7.5mg → 10mg → 12.5mg → 15mg
- GLP-1 receptor agonist
- Up to 15–17% body weight loss (STEP trials)
- Weekly injection, 5-step dose escalation
- NHS & private prescription available
- Doses: 0.25mg → 0.5mg → 1mg → 1.7mg → 2.4mg
Mounjaro vs Wegovy: Head-to-Head
A side-by-side comparison of the two most popular GLP-1 weight loss medications available in the UK.
| Feature | Mounjaro | Wegovy |
|---|---|---|
| Drug class | Dual GIP/GLP-1 agonist | GLP-1 agonist |
| Active ingredient | Tirzepatide | Semaglutide |
| Avg. weight loss | 15–22.5% | 12–17% |
| Key trial | SURMOUNT-1 (2022) | STEP 1 (2021) |
| Max dose | 15 mg weekly | 2.4 mg weekly |
| Escalation period | 20–32 weeks | 16–20 weeks |
| Administration | Weekly injection (pen) | Weekly injection (pen) |
| NHS availability | Private prescription only | NHS & private |
| Approx. private cost | £150–£250/month | £150–£300/month |
| Common side effects | Nausea, diarrhoea, constipation | Nausea, vomiting, diarrhoea |
Data sourced from SURMOUNT-1 and STEP 1 clinical trials. Costs are approximate and vary by provider. Always consult a prescriber.
Am I Eligible for Weight Loss Medication?
In the UK, eligibility for GLP-1 weight loss medications like Mounjaro and Wegovy is based on your BMI and overall health profile.
- BMI of 30 or above (obese)
- Age 18 or over
- No contraindicated conditions
- Committed to lifestyle changes
- BMI of 27 or above
- Plus type 2 diabetes
- Or high blood pressure
- Or obstructive sleep apnoea
Use our BMI calculator to check whether your BMI falls within the eligible range.
How We Built These Tools
Every calculator and guide on myweightcheck is built with accuracy and transparency in mind. Our BMI calculator uses the standard WHO formula with NHS-aligned category thresholds. Our GLP-1 projections are modelled on published clinical trial data from SURMOUNT and STEP studies.
All data stays on your device. We don't require sign-ups, and we don't store your health information on any server. Your progress tracker saves data locally in your browser using localStorage, so only you can see it.
We're based in the UK and our tools are designed specifically for UK users — supporting stone & lbs by default, referencing NHS guidelines, using NICE-approved medication data, and linking to GPhC-registered pharmacies.
Frequently Asked Questions
Common questions about BMI, weight loss medications, and our free UK tools.
What is the typical UK price for Mounjaro 10mg?
Private prescriptions for Mounjaro 10mg typically cost £150–£250 per month in the UK, depending on the provider. A single KwikPen contains 4 doses (one month's supply). Costs may vary slightly between online prescribing services. NHS access is through specialist weight management services, though regional availability and waiting times differ considerably.
How does Mounjaro 10mg compare to Wegovy in terms of weight loss?
Clinical trials showed Mounjaro users lost approximately 19.5% body weight at 10mg, while Wegovy users lost approximately 15% at its maximum dose of 2.4mg. However, individual results vary significantly. The difference relates to Mounjaro's dual GIP+GLP-1 mechanism versus Wegovy's single GLP-1 mechanism. Your prescriber can discuss which may suit your circumstances.
Is Mounjaro 10mg available on the NHS in the UK?
Yes, tirzepatide (Mounjaro) is NICE-approved for NHS use through specialist tier 3 weight management services. However, availability varies significantly by region, and waiting lists can be lengthy in many areas. You can ask your GP about referral to specialist services, or access Mounjaro privately through GPhC-registered online prescribing services.
Do I need to reach 10mg or can I stay on a lower Mounjaro dose?
Doses are individualised. You start at 2.5mg and increase by 2.5mg every 4 weeks as tolerated. Many people achieve good results at 5mg or 7.5mg and don't need to escalate to 10mg. Your prescriber will adjust based on your weight loss progress, side effects, and individual response. There's no requirement to reach the maximum dose.
How does the cost of Mounjaro compare to Wegovy in the UK?
Costs are broadly similar in private prescribing — both typically range from £150–£250 per month depending on the provider and your specific dose. Exact pricing varies between services. NHS access to both is available through specialist services. Compare actual prices from providers when obtaining quotes, as they can differ.
Ready to take control of your weight loss journey?
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