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 Pricing in the UK — What You Need to Know
Mounjaro (tirzepatide) pricing in the UK varies significantly depending on whether you access it through the NHS or privately. Through specialist NHS tier 3 weight management services, Mounjaro may be available free at the point of use if you meet NICE eligibility criteria. Private prescriptions typically range from £129 to £320 per month depending on your dose, with costs increasing as you titrate through the dose escalation schedule from 2.5 mg to the maximum 15 mg. Understanding both routes can help you make an informed decision about your weight management options alongside lifestyle changes.
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Calculate Your BMI Instantly
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.
NHS Access and Eligibility for Mounjaro in the UK
NHS access to Mounjaro is through specialist tier 3 weight management services, not your GP's surgery. You'll need a referral from your GP to your local integrated care board (ICB) weight management service. NICE has approved tirzepatide (Mounjaro's active ingredient) for use within NHS specialist weight management services for adults with a BMI of 30 kg/m² or above, or 27–29.9 kg/m² with weight-related health conditions such as type 2 diabetes, high blood pressure, or dyslipidaemia.
However, NHS availability varies dramatically by region. Some ICBs have no current Mounjaro provision, whilst others have waiting lists stretching many months. When available on the NHS, there is no out-of-pocket cost — the medication is provided free at the point of use. The challenge is accessing it: you may be offered alternative treatments first, or face significant waiting times. Regional postcode lottery remains a real issue for NHS access to Mounjaro in 2024.
- Check your local ICB website to see if Mounjaro is available in your area
- Speak to your GP about NHS specialist weight management service referral options
- Ask about timescales — waiting lists vary from weeks to over a year in some regions
Clinically BackedWeight Loss
No appointments. No waiting rooms. Just care — from a UK-regulated online pharmacy.
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.
Private Mounjaro Pricing and How to Access It
Private Mounjaro prescriptions are available through UK-licensed online pharmacies following a clinical assessment from a UK-registered prescriber. Costs vary by provider and dose:
- 2.5 mg (starting dose): approximately £129–£180
- 5 mg: approximately £150–£210
- 10 mg: approximately £200–£280
- 15 mg (maximum dose): approximately £250–£320
Each KwikPen contains 4 weeks of doses, so monthly costs align with the above. Private prescribing offers faster access than NHS routes — you can typically receive your first dose within 1–2 weeks of assessment. However, you'll need to budget for ongoing monthly costs. Prices vary between providers, so comparing options can help you find the best value whilst ensuring you use a GPhC-registered pharmacy.
- 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.
Is Mounjaro available on the NHS in the UK?
Yes, NICE has approved Mounjaro for NHS use within specialist tier 3 weight management services, but availability varies significantly by region. Some areas have waiting lists of many months or years, whilst others have limited or no current provision. You'll need a GP referral to your local integrated care board weight management service. When available, it's free on the NHS.
How much does Mounjaro cost privately in the UK?
Private Mounjaro pricing typically ranges from £129 to £320 per month depending on your dose. The starting dose (2.5 mg) costs around £129–£180, whilst the maximum dose (15 mg) costs approximately £250–£320. Each KwikPen supplies 4 weeks of once-weekly injections. Prices vary between GPhC-registered pharmacies, so it's worth comparing.
What's the difference between NHS and private Mounjaro access?
NHS access is free at the point of use but requires specialist referral and faces regional availability issues and waiting lists. Private access is faster (1–2 weeks) and doesn't require NHS referral, but you pay monthly costs. Both require a prescription from a UK-licensed prescriber following clinical assessment. Choose based on your budget, timeline, and local NHS provision.
What is the Mounjaro dose titration schedule and does each dose cost more?
Mounjaro titrates from 2.5 mg (weeks 1–4) to a maximum of 15 mg, with dose increases every 4 weeks. Each dose increase costs more — starting dose around £129–£180 and maximum dose around £250–£320 per month. You'll only pay for the dose you're currently on, not all doses upfront. Private providers typically allow you to upgrade your dose as you progress.
How does Mounjaro pricing compare to Wegovy in the UK?
Mounjaro and Wegovy have similar private pricing ranges (approximately £130–£320 per month), though exact costs vary by provider and dose. Wegovy's maximum dose (2.4 mg) typically costs less than Mounjaro's maximum (15 mg) because the doses are smaller. Both are significantly cheaper through the NHS when available, though NHS access varies by region. Your prescriber will assess which is most suitable for you.
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.