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: NHS and Private Options
Mounjaro (tirzepatide) pricing in the UK varies significantly depending on whether you access it through the NHS or privately. On the NHS, Mounjaro is available free through specialist tier 3 weight management services for eligible adults, though availability and waiting times vary by region. Privately, costs typically range from £130 to £320 per month depending on your dose. Understanding your options and eligibility is essential before pursuing treatment. This guide explains NHS access, private pricing, and what affects the cost of your Mounjaro prescription in the UK.
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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.
NHS Access and Eligibility for Mounjaro in the UK
NHS Mounjaro is available free through specialist weight management services (tier 3/4), but access varies significantly by region and local ICB (Integrated Care Board) commissioning decisions. You cannot obtain Mounjaro directly from your GP; instead, you must be referred to a specialist NHS weight management service.
To be eligible for NHS Mounjaro:
- BMI of 30 kg/m² or above, OR BMI of 27–29.9 kg/m² with a weight-related health condition (type 2 diabetes, hypertension, dyslipidaemia, sleep apnoea, or cardiovascular disease)
- For South Asian, Chinese, Black African, or Black Caribbean adults: lower thresholds may apply (BMI 27.5 or above)
- Previous engagement with tier 2 weight management interventions (some areas require this)
Check your local ICB website or ask your GP whether Mounjaro is currently commissioned in your area. Many regions have no current Mounjaro availability on the NHS, and waiting lists for tier 3 services can extend 12–24 months in major cities.
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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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Private Mounjaro Pricing and Access in the UK
Mounjaro available privately typically costs £130–£320 per month, depending on your dose (higher doses cost more). Private access is through GPhC-registered online pharmacies following an online clinical assessment with a UK-licensed prescriber. No NHS referral is required. Costs include the consultation, prescription, and dispensing. Some providers offer bundle discounts for 3 or 6-month supplies. Calculate your estimated weight loss potential and compare dosing with our free GLP-1 weight loss calculator, which also helps you understand the progression from starting dose (2.5 mg) through to maintenance doses (up to 15 mg weekly). You'll receive your Mounjaro KwikPen by post, and storage requires a standard refrigerator.
- 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?
Mounjaro is available on the NHS through specialist tier 3 weight management services for eligible adults, but availability varies by region (ICB). Some areas have no current commissioning, and waiting lists are often 12+ months. Your GP can refer you to your local specialist service, or you can access it privately without NHS involvement.
How much does Mounjaro cost privately in the UK?
Private Mounjaro costs typically £130–£320 per month depending on your dose. Prices vary slightly between providers. Starting doses (2.5 mg) are cheaper; maximum doses (15 mg) cost more. Some pharmacies offer discounts for bulk supplies. Always check the full cost, including the online consultation fee.
Why is Mounjaro pricing different on NHS vs private?
NHS medication is free at point of care (funded by taxation), while private prescriptions incur direct costs for the consultation, prescription, pharmacy dispensing, and delivery. Private providers also cover their operating costs and margins, whereas NHS provision is bulk-negotiated. The medication itself is identical.
What affects the cost of Mounjaro privately?
Your dose (higher doses cost more), how many pens you order (bulk discounts available), and your provider all affect cost. The online consultation fee varies (typically £20–£50). Storage and delivery are usually included. Some providers offer loyalty discounts or subscription savings.
How do I check if Mounjaro is available on my local NHS?
Contact your GP and ask for a referral to your local tier 3 weight management service. You can also check your ICB (Integrated Care Board) website directly to see whether tirzepatide/Mounjaro is currently commissioned. Postcode-based NHS services finders can also indicate regional availability.
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.