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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Cheapest Mounjaro Price in the UK — NHS vs Private Options
Mounjaro (tirzepatide) pricing in the UK varies significantly depending on whether you access it through NHS specialist services or private prescription routes. Understanding your options, eligibility criteria, and what affects the cost can help you find the most affordable route. This guide covers NHS access, private prescribing costs, dose-dependent pricing, and practical steps to explore both pathways for weight management support.
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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 to Mounjaro and Eligibility Requirements
NHS access to Mounjaro is free at the point of use if prescribed through specialist tier 3 or tier 4 weight management services. However, NHS availability is limited and varies significantly by region. Most NHS services have lengthy waiting lists, sometimes 12–24 months or longer depending on your Integrated Care Board (ICB).
- NHS eligibility: BMI of 30 kg/m² or above, or BMI 27–29.9 with weight-related health conditions (type 2 diabetes, hypertension, sleep apnoea)
- South Asian, Chinese, Black African, or Black Caribbean adults: Lower thresholds may apply (BMI 27.5+)
- NICE approval: Tirzepatide was approved by NICE for use within NHS weight management services, but access depends on local ICB funding and capacity
- Route: GP referral to specialist weight management service, not direct GP prescription
The NHS cost is therefore £0, but waiting times mean many people explore private options for faster access.
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 in the UK — What to Expect
Private prescription pricing for Mounjaro ranges from approximately £129–£320 per month, depending on the dose and provider. Prices reflect prescription costs, clinical consultation, and pharmacy dispensing fees rather than manufacturing cost alone.
- Starting dose (2.5 mg): Usually around £129–£149 per month
- Maintenance doses (5–15 mg): Typically £180–£320+ per month depending on dose escalation
- Prescription requirements: Online clinical assessment with a UK-licensed prescriber before dispensing by GPhC-registered pharmacies
Costs are similar to Wegovy (semaglutide) private pricing, though tirzepatide's dual GIP/GLP-1 mechanism may appeal to some users seeking a different approach.
Private prescription pricing for Mounjaro ranges from approximately £129–£320 per month, depending on the dose and provider. Prices reflect prescription costs, clinical consultation, and pharmacy dispensing fees rather than manufacturing cost alone.
- Starting dose (2.5 mg): Usually around £129–£149 per month
- Maintenance doses (5–15 mg): Typically £180–£320+ per month depending on dose escalation
- Prescription requirements: Online clinical assessment with a UK-licensed prescriber before dispensing by GPhC-registered pharmacies
- Comparison with Wegovy: Similar pricing to semaglutide injections, though individual providers vary
Private cost is therefore substantial but offers faster access than NHS waiting lists. Many people budget 6–12 months of treatment to assess effectiveness.
- 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 free on the NHS in the UK?
Mounjaro is free on the NHS if prescribed through specialist tier 3 weight management services, but access is limited and waiting lists are typically very long (12–24 months in many areas). Most people access Mounjaro privately due to NHS availability constraints.
What's the cheapest way to get Mounjaro in the UK?
The cheapest route is NHS prescription if you can access a tier 3 specialist weight management service, which is completely free. For faster access, private prescription through GPhC-regulated online providers costs £129–£320/month depending on dose. Compare private providers for best rates.
Why does Mounjaro cost more at higher doses?
Higher doses (10 mg, 15 mg) contain more active pharmaceutical ingredient and typically cost £250–£320/month, while starting doses cost less. You'll progress through doses gradually over weeks, so initial costs are lower than final maintenance costs.
Can I use a prescription weight loss UK calculator to plan costs?
Yes — our GLP-1 weight loss calculator can help you estimate which dose you might reach, which lets you estimate likely private costs. You'll also need our BMI calculator to confirm NHS eligibility before pursuing either route.
How do NHS and private Mounjaro access differ in terms of cost?
NHS access is completely free but involves months-long waits and referral requirements. Private prescription is £129–£320/month but available within 1–2 weeks following online clinical assessment. Choose based on urgency and budget constraints.
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.