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
Free tracker included with every download this week
What Is the Mounjaro NHS Price in the UK?
Mounjaro (tirzepatide) pricing through the NHS is not a simple fixed cost — access and cost depend on your region and whether you qualify for specialist weight management services. The NHS does not publish a standard patient price for Mounjaro, as it's typically prescribed through tier 3 or tier 4 specialist weight management services rather than in general practice. This guide explains how NHS access works, what you might expect to pay privately, and how to check eligibility in your area.
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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 How It's Funded
In the UK, Mounjaro is available through NHS specialist weight management services, meaning you'll need a referral from your GP to a tier 3 or tier 4 service. Once prescribed through the NHS, there is no direct patient cost — it's funded by your local Integrated Care Board (ICB). However, access varies significantly by region.
- Some ICBs offer Mounjaro readily; others have waiting lists of several months or restrict it to patients with additional health conditions like type 2 diabetes
- Your GP cannot prescribe Mounjaro directly in primary care — referral to a specialist service is required
- NICE approved tirzepatide for weight management in adults with a BMI of 30 or above, or 27–29.9 with weight-related health conditions
- Eligibility assessment includes evaluation of your BMI, health conditions, previous weight loss attempts, and readiness to commit to lifestyle changes
Contact your local NHS weight management service or ask your GP about referral pathways in your area — waiting times and criteria vary considerably across England, Scotland, Wales, and Northern Ireland.
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 Access and Costs in the UK
If NHS access isn't available in your area or waiting times are long, private access to Mounjaro is available through GPhC-registered online pharmacies following a clinical assessment by a UK-licensed prescriber. Private costs are significantly higher than NHS provision.
- Typical private cost range: £129–£320 per month depending on dose and provider
- Starting dose (2.5 mg) is usually the least expensive
- Doses increase weekly over 4-week intervals — costs increase at each dose escalation
- A full titration course (reaching therapeutic dose 10–15 mg) typically takes 16–20 weeks and costs £2,000–£6,000+ over that period
Private prescriptions require online consultation and must be issued by a licensed UK prescriber. Always check that the provider is registered with the GPhC and uses qualified prescribers before proceeding.
- 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.
Can I get Mounjaro free on the NHS?
Yes, Mounjaro is available free through NHS specialist weight management services if you qualify and are referred by your GP. However, access varies by region and some areas have long waiting lists. Contact your local ICB or ask your GP about eligibility and availability in your area.
How much does Mounjaro cost privately in the UK?
Private Mounjaro typically costs £129–£320 per month depending on your dose. Doses increase gradually over 4–5 months, so total costs for a full treatment course can reach £2,000–£6,000+. Prices vary between providers — always compare and check GPhC registration.
What's the difference between NHS and private Mounjaro access?
NHS access is free but requires GP referral to a specialist service and varies by region. Private access is faster but costs significantly more. Both require a clinical assessment to confirm you're eligible. NHS doesn't cover private costs, and private prescriptions aren't transferred to NHS.
Do I need to pay for Mounjaro storage or injections?
No — whether NHS or private, Mounjaro comes as pre-filled KwikPens ready to inject. There are no additional injection costs or storage fees. Private prescriptions include the medication cost only; NHS covers everything if prescribed through their service.
How do I find out if my NHS area offers Mounjaro?
Contact your GP and ask to be referred to your local tier 3 weight management service. They'll assess your eligibility. You can also contact your local ICB directly or search your NHS trust website for weight management services. Waiting times and availability vary — some areas have months-long waiting lists.
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.