The UK's most complete GLP-1 guide
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- 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 Increase in the UK — What You Need to Know
Mounjaro (tirzepatide) costs have increased significantly in the UK private market over recent months. If you're considering this prescription weight loss injection, understanding the current pricing landscape and your access options is essential. This guide explains what Mounjaro costs via private prescription, how NHS access works, and how to find legitimate, safe prescribing routes in the UK. Whether you're starting your weight loss journey or exploring treatment options, knowing the real costs helps you make an informed decision.
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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.
Current Mounjaro Costs and Private Prescription Pricing in the UK
Private prescription costs for Mounjaro in the UK vary significantly depending on the dose and prescriber. At starting doses (2.5 mg), costs typically range from £120–£150 per four-week supply. At maintenance doses (10–15 mg), monthly costs can reach £280–£350 or more, depending on the provider. These prices reflect recent increases across the private weight loss injection market. Important: when comparing providers, always verify they are GPhC-registered pharmacies working with UK-licensed prescribers. Costs include the clinical assessment, prescription, and medication delivery. Some providers offer tiered pricing or subscription packages, which may reduce per-dose costs over longer treatment periods.
- Starting dose (2.5 mg): typically £120–£150 per month
- Mid-range doses (5–7.5 mg): typically £180–£230 per month
- Higher doses (10–15 mg): typically £280–£350+ per month
- Prices vary by provider and may include initial consultation fees
- Always check that your prescriber is UK-licensed and the pharmacy is GPhC-registered
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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 vs Private Access — How to Get Mounjaro in the UK
In the UK, you can access Mounjaro through two routes: NHS specialist services or private prescription. NHS access: NICE has approved tirzepatide for specialist weight management services, but availability is limited and varies by region. Most people are referred to tier 3 or 4 specialist services through their GP, and waiting lists can be months or years in many areas. Private route: you can access Mounjaro through a private online consultation with a UK-licensed prescriber without an NHS referral. After assessment, a prescription is issued to a GPhC-registered pharmacy for dispensing. Private access is faster but involves upfront costs. Either route requires a proper clinical assessment to ensure the medication is safe and suitable for your individual health profile.
Starting a private prescription typically involves: completing an online health questionnaire, having a consultation with a UK-licensed prescriber (via phone, video, or in-person), receiving a prescription if approved, and arranging delivery through a registered pharmacy. Your prescriber will discuss your medical history, current medications, and weight loss goals to ensure Mounjaro is appropriate for you. Doses are titrated gradually over weeks, so your first supply costs less than later maintenance doses. Using our GLP-1 weight loss calculator can help you estimate potential outcomes and plan your treatment timeline before starting.
- 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.
Why has Mounjaro price increased in the UK recently?
Increased demand for weight loss injections, supply chain factors, and rising manufacturing costs have all contributed to price increases in the UK private market. NHS pricing is negotiated separately and is not publicly disclosed. Prices continue to vary between private providers based on their procurement costs and service delivery models.
Is Mounjaro available on the NHS in the UK?
Yes, NICE has approved tirzepatide (Mounjaro) for use within NHS specialist weight management services. However, access is limited and availability varies significantly by region. Most people require a referral from their GP to a tier 3 specialist service, and waiting times can be substantial. Private access is faster but involves cost.
What does a private Mounjaro prescription cost at different doses?
Starting dose (2.5 mg) typically costs £120–£150 monthly. Mid-range doses (5–7.5 mg) cost £180–£230 monthly. Higher doses (10–15 mg) cost £280–£350+ monthly. Prices vary by provider and may include consultation fees. Always verify your provider is GPhC-registered and your prescriber is UK-licensed.
Can I switch from Wegovy to Mounjaro and compare costs?
Yes, some people switch between GLP-1 medications based on effectiveness or cost. Approximate dose equivalence exists (e.g., Wegovy 0.5 mg ≈ Mounjaro 5 mg), but any switch must be managed by your prescriber. Costs differ between medications—use our GLP-1 weight loss calculator to compare projected outcomes alongside pricing.
How do I know if a UK Mounjaro provider is legitimate?
Check that the pharmacy is registered with the GPhC (General Pharmaceutical Council) and the prescriber is a UK-licensed doctor or nurse. Legitimate providers require a proper online consultation, not just a quick form. Avoid providers offering medications without clinical assessment—this is unsafe and potentially illegal.
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.