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. This guide explains current costs, dose pricing, and how to understand what you'll pay for this prescription weight loss injection. Mounjaro is prescription-only and requires a clinical assessment before being prescribed, which affects overall costs. Prices change periodically, so it's worth understanding the factors that influence what you'll pay and your access options through both NHS specialist services and private online prescribing routes.
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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.
Private Mounjaro Pricing in the UK
Private Mounjaro prescription costs in the UK typically range from approximately £129 to £320 per month, depending on your dose and the provider you choose. Each KwikPen contains four weekly doses, so prices are usually quoted per pen or per month of treatment.
- 2.5 mg dose: Usually the lowest cost — typically £129–£180 per month
- 5 mg dose: Mid-range pricing — typically £150–£220 per month
- 10 mg dose: Higher pricing — typically £200–£270 per month
- 15 mg dose (maximum): Highest cost — typically £250–£320 per month
Prices vary between GPhC-registered online pharmacies, so it's worth comparing. Private prescriptions require an online clinical assessment from a UK-licensed prescriber, which may include an additional consultation fee (typically £20–£50). Some providers bundle this into their overall cost. Always check whether the quoted price includes the prescriber assessment or if it's charged separately.
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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.
NHS Mounjaro Access & Availability
Mounjaro is approved by NICE for use within the NHS, but access is only through specialist tier 3 or tier 4 weight management services — not via standard GP prescription. You must be referred by your GP to a specialist weight management service in your area. NHS availability and waiting times vary significantly by region (Integrated Care Board). Some areas have substantial waiting lists, sometimes 12+ months. If prescribed via the NHS, there is no direct cost to you (covered by NHS prescription charges if applicable). However, accessing Mounjaro privately without NHS referral is faster, though costs are higher. Use our free GLP-1 weight loss calculator to understand potential outcomes at different doses, and discuss access routes with your GP.
- 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 prescription in the UK privately?
Private Mounjaro costs typically range from £129–£320 per month depending on dose. The 2.5 mg starting dose is usually around £129–£180/month, while the maximum 15 mg dose costs £250–£320/month. Prices vary between GPhC-registered pharmacies, so comparing providers is worthwhile. Add £20–£50 for an online prescriber consultation if charged separately.
Can I get Mounjaro on the NHS in the UK?
Yes, Mounjaro is NICE-approved for NHS use, but only through specialist weight management services (tier 3/4), not standard GP prescription. You need a GP referral to a specialist service. NHS waiting times vary by region and can exceed 12 months. Once prescribed via NHS, there's no medication cost beyond standard prescription charges.
What is the difference between Mounjaro and Wegovy in terms of cost?
Mounjaro (tirzepatide) and Wegovy (semaglutide) have similar private pricing ranges (£129–£320/month depending on dose). Mounjaro is a dual GIP+GLP-1 agonist with higher average weight loss in trials (~20.9% at maximum dose), while Wegovy is a GLP-1-only agonist (~clinically studied weight loss). Clinical trial data showed Mounjaro achieved slightly greater weight loss, but individual results vary significantly.
Does Mounjaro price include the online GP consultation?
This depends on the provider. Some GPhC-registered pharmacies include the prescriber consultation in their quoted price, while others charge separately (typically £20–£50). Always check the full cost breakdown before purchasing. The consultation is essential — a UK-licensed prescriber must assess your eligibility and suitability before issuing a prescription.
Why does Mounjaro cost more at higher doses?
Higher doses contain more active tirzepatide and are typically more expensive to manufacture and dispense. The 15 mg dose (maximum) costs more than the 2.5 mg starting dose. Pricing also reflects supply, demand, and provider margins. Starting at 2.5 mg and titrating up means you begin at lower cost, with increases every 4 weeks as prescribed.
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.