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 Price Comparison UK Chart
Mounjaro (tirzepatide) is available in the UK through NHS specialist weight management services and private online prescribing, with costs varying significantly depending on where you access treatment and which dose you're prescribed. This guide breaks down the price differences, dose titration costs, and factors affecting how much you'll pay for this once-weekly weight loss injection. Understanding pricing helps you make an informed decision about whether Mounjaro is right for you.
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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 Pricing in the UK
NHS pricing: Mounjaro is available on the NHS through tier 3 specialist weight management services in some regions. Costs are covered by the NHS if you meet eligibility criteria (BMI 30 or above, or 27+ with weight-related health conditions), though availability and waiting times vary significantly by region and integrated care board.
Private pricing: Through private online prescribing services, Mounjaro typically costs between £129–£320 per month depending on dose and provider. Lower doses (2.5 mg–5 mg) usually cost less, while higher maintenance doses (10 mg–15 mg) cost more. Most private providers offer monthly subscriptions or pay-as-you-go options.
- 2.5 mg starter dose: approximately £129–£150/month
- 5 mg maintenance dose: approximately £150–£180/month
- 10 mg higher dose: approximately £200–£250/month
- 15 mg maximum dose: approximately £280–£320/month
Prices do not include the cost of the KwikPen device itself on some platforms, though many providers include this in their quoted price. Always check what is included before purchasing.
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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.
Factors Affecting Mounjaro Costs
Several factors influence how much you pay for Mounjaro in the UK. Dose level is the primary driver — you start at 2.5 mg and titrate up weekly until reaching your maintenance dose, typically between 5 mg and 15 mg. Higher doses cost more per injection. Provider type also matters: NHS provision is free at point of care but involves waiting lists; private online services charge monthly fees. Subscription vs. pay-as-you-go options affect total cost — some providers offer discounts for committing to longer treatment periods. Geographic variation exists too: Scotland, Wales, and Northern Ireland may have different NHS availability and private pricing than England. Use our GLP-1 weight loss calculator to explore potential outcomes alongside different doses, helping you weigh costs against expected 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.
How much does Mounjaro cost privately in the UK?
Private Mounjaro costs typically range from £129–£320 per month depending on dose. Starter doses (2.5–5 mg) cost less; higher maintenance doses (10–15 mg) cost more. Always confirm whether your provider includes the KwikPen device in this price.
Is Mounjaro free on the NHS in the UK?
Mounjaro may be free through NHS tier 3 specialist weight management services if you meet eligibility criteria (BMI 30+ or 27+ with health conditions). However, availability varies by region and waiting times can be long. Your GP can refer you to local services.
What's the difference between Mounjaro and Wegovy prices in the UK?
Wegovy typically costs £129–£290 per month privately, similar to Mounjaro. Both are prescription-only and require clinical assessment. The dose ranges differ (Wegovy maxes at 2.4 mg; Mounjaro at 15 mg), which affects pricing. Your prescriber will advise which is suitable.
Do I need to pay for every dose when titrating Mounjaro?
Yes, with private prescribing you typically pay monthly even during titration. You start at 2.5 mg and increase weekly over 16–20 weeks to reach maintenance dose. NHS provision covers all doses included in your specialist service.
Why do Mounjaro prices vary between private providers?
Private providers set their own pricing based on sourcing, compliance costs, and service model. Differences in included services (clinical support, follow-up calls, device supply) also affect cost. Always compare what's included, not just the price per injection.
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.