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 List Comparison in the UK
Mounjaro (tirzepatide) pricing in the UK varies significantly depending on whether you access it through the NHS or private prescribing. This guide explains the costs across different doses, what affects pricing, and how to understand your options. Use our free GLP-1 weight loss calculator to estimate potential results and decide if Mounjaro is right for you alongside these cost considerations.
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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.
Understanding Mounjaro Pricing in the UK
Private prescribing costs typically range from approximately £129 to £320 per month depending on your dose and the prescribing provider. The Mounjaro KwikPen contains four weekly doses, so monthly costs reflect a four-week supply. Doses include: 2.5mg (starting dose), 5mg, 7.5mg, 10mg, 12.5mg, and 15mg (maximum). Prices generally increase with dose strength — starting doses cost less than maintenance doses. NHS costs are free at the point of access if prescribed through a specialist tier 3 weight management service, though NHS availability is extremely limited and varies by region (ICB). Waiting lists for NHS specialist weight management services can extend many months or years in many areas, making private prescribing the only realistic option for many people. Always ensure you use a GPhC-registered pharmacy with a UK-licensed prescriber — never purchase from unregistered or overseas sources.
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.
Dose Titration and Long-Term Cost Planning
Mounjaro uses a dose titration schedule: you start at 2.5mg weekly, then increase by 2.5mg every four weeks until reaching an effective maintenance dose (typically 10mg or 15mg). This means your first month costs less than subsequent months once you reach maintenance. Budget for approximately 4–6 months of treatment before stabilising at your final dose level. Some private prescribers offer price reductions for longer commitments or bulk purchases. Calculate your BMI using our free BMI calculator to understand your starting point, then discuss long-term costs with your prescriber during your clinical assessment. Costs may also vary based on your clinical assessment and whether you're starting Mounjaro for the first time or switching from another GLP-1 medication.
- 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 on the NHS in the UK?
Mounjaro is free at the point of access if prescribed through an NHS specialist tier 3 weight management service. However, NHS prescribing is extremely limited and varies significantly by region. Waiting lists can be months or years. Most people access Mounjaro privately through GPhC-registered pharmacies following an online clinical assessment.
What's the typical private cost for Mounjaro in the UK?
Private Mounjaro costs typically range from £129–£320 per month depending on dose. Starting doses (2.5mg) cost less; maintenance doses (10mg–15mg) cost more. Each KwikPen contains four weekly doses. Prices may vary between providers, so compare options before purchasing.
Does the dose affect the price of Mounjaro?
Yes. Mounjaro pricing increases with dose strength. You start at 2.5mg and increase by 2.5mg every four weeks, so early-stage costs are lower than maintenance-stage costs. Budget for 4–6 months of increasing costs before your dose stabilises at an effective level.
Can I get Mounjaro cheaper by buying larger quantities?
Some private prescribers offer discounts for longer treatment commitments or bulk purchases. Always ask your prescriber about package deals or reduced rates. Compare pricing across GPhC-registered pharmacies to find the best value, but never compromise on clinical assessment quality.
Is Mounjaro cheaper than Wegovy in the UK?
Mounjaro and Wegovy (semaglutide) pricing is similar — both typically range £129–£320/month depending on dose and provider. Mounjaro's dual GIP+GLP-1 mechanism differs from Wegovy's GLP-1-only action. Individual results vary. Your prescriber will recommend the most suitable option based on your health profile, not just cost.
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.