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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What Does 10 mg Mounjaro Cost in the UK?
The cost of 10 mg Mounjaro in the UK varies significantly depending on whether you access it through the NHS or privately. On the NHS, tirzepatide is available through specialist tier 3 weight management services, though availability and waiting times vary by region. Privately, a single pen typically costs between £129 and £180 depending on your prescriber and pharmacy. Understanding both the cost and how it compares to Wegovy (semaglutide) can help you make an informed decision with your GP or prescriber about which medication suits your health and budget.
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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.
Mounjaro 10 mg Cost: NHS vs Private Access
NHS access: Through NICE-approved specialist weight management services (tier 3), Mounjaro is available on prescription free at the point of care. However, NHS availability is limited — not all regions offer tirzepatide yet, and waiting lists can be several months. Your GP will refer you to a specialist service, which will assess your eligibility based on your BMI and weight-related health conditions.
Private prescribing: A single Mounjaro KwikPen (4 doses, one month supply) at 10 mg typically costs £129–£180 through GPhC-registered online pharmacies in the UK. Total monthly costs depend on your dose escalation — you may pay less for lower doses (5 mg or 7.5 mg) during titration. Annual private costs at 10 mg are roughly £1,500–£2,160 before any clinic or prescriber consultation fees.
Cost comparison factor: Mounjaro is often priced similarly to Wegovy (semaglutide) at equivalent doses, though both require clinical assessment before prescription.
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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
Everything you need to understand your weight, explore medication options, and track your progress — completely free.
Mounjaro 10 mg vs Wegovy: Mechanism, Efficacy, and Clinical Data
At the 10 mg dose, Mounjaro (tirzepatide) and Wegovy (semaglutide) represent different pharmacological approaches. Mounjaro is a dual GIP and GLP-1 receptor agonist, activating two hormone pathways simultaneously. Wegovy uses GLP-1 receptor agonism only. In clinical trials, Mounjaro's SURMOUNT-1 trial showed approximately 19.5% average body weight loss at 10 mg over 72 weeks. Wegovy's STEP-1 trial (at maximum 2.4 mg) showed approximately 14.9% average weight loss over 68 weeks. Individual results vary significantly, and either medication's suitability depends on your personal health history, other medications, and prescriber assessment. Use our GLP-1 weight loss calculator to explore potential outcomes at different doses, and our BMI calculator to understand your baseline health metrics before consulting your prescriber.
- 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.
How much does a single 10 mg Mounjaro pen cost privately in the UK?
A single Mounjaro KwikPen containing 4 doses (one month supply) at 10 mg typically costs between £129 and £180 through private UK pharmacies. Prices may vary depending on your prescriber and pharmacy. You may also need to pay a consultation fee to a UK-licensed prescriber for the initial assessment and prescription.
Is 10 mg Mounjaro available on the NHS?
Yes, Mounjaro (tirzepatide) is approved by NICE for NHS use through specialist tier 3 weight management services. However, availability varies significantly by region (ICB), and waiting lists can be lengthy. Your GP will refer you to a specialist service for assessment and prescription if you meet eligibility criteria.
Is Wegovy cheaper than Mounjaro at equivalent doses?
Prices are generally comparable between Mounjaro and Wegovy in private UK pharmacies, typically £129–£180 per month. Wegovy's maximum dose is 2.4 mg (roughly equivalent to 10 mg Mounjaro), and pricing is similar. Exact costs vary by provider and dose. Compare options with your prescriber.
What's the difference between Mounjaro and Wegovy at 10 mg?
Mounjaro at 10 mg activates two hormone pathways (GIP + GLP-1), while Wegovy (max 2.4 mg) activates GLP-1 only. Clinical trials show Mounjaro produced slightly greater average weight loss. Both are prescription-only and require clinical assessment. Your prescriber will help determine which is suitable for you.
Can I get Mounjaro 10 mg without paying privately?
Yes, through the NHS specialist weight management services if you're referred and meet eligibility criteria. However, NHS access varies by region and waiting times can be long. Private prescribing offers faster access but involves upfront costs. Discuss both options with your GP.
Ready to take control of your weight loss journey?
Start with a free BMI check, explore your GLP-1 options, or begin tracking your progress today. No sign-up. No cost. Just results.