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 Decrease: UK Cost and Access
Mounjaro (tirzepatide) pricing in the UK has become more competitive as the market has developed. Whether you're accessing this prescription-only weight management injection through the NHS or privately, it's important to understand your options and what costs you might face. This guide explains current UK pricing, how to access Mounjaro affordably, and the difference between NHS and private 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.
Mounjaro Pricing in the UK Private Market
Private prescription costs for Mounjaro in the UK typically range from £129 to £320 per month depending on the dose prescribed and the provider. The 2.5 mg starting dose is usually at the lower end, while the higher maintenance doses (10 mg to 15 mg) are more expensive.
Prices have become more accessible as tirzepatide has been available longer and competition between licensed pharmacies has increased. Many private providers now offer competitive pricing and payment plans. When comparing costs, ensure you're using a GPhC-registered pharmacy and a UK-licensed prescriber — this protects your safety and ensures prescriptions are clinically assessed.
The dose titration process (gradually increasing your dose over weeks) means your initial monthly cost may be lower than the full maintenance cost. Use our free GLP-1 weight loss calculator to understand typical dose progression and projected timeline.
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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: Which Route Is Right for You?
NHS access: Mounjaro is now approved by NICE for use in specialist tier 3/4 weight management services. You'll need a referral from your GP, but once prescribed, the cost to you is your standard prescription charge (currently £9.90 in England if eligible). However, waiting lists are significant in many areas — often months to over a year depending on your region.
Private access: Available immediately without NHS referral. You complete an online consultation with a UK-licensed prescriber, receive a prescription if clinically suitable, and order from a GPhC pharmacy. No waiting list, but full cost is your responsibility. Many people choose private access for speed when they're ready to start treatment. Calculate your potential weight loss with our GLP-1 calculator to help inform your decision about treatment timing.
NHS access: Mounjaro is now approved by NICE for use in specialist tier 3/4 weight management services. You'll need a referral from your GP, but once prescribed, the cost to you is your standard prescription charge (currently £9.90 in England if eligible). However, waiting lists are significant in many areas — often months to over a year depending on your region.
Private access: Available immediately without NHS referral. You complete an online consultation with a UK-licensed prescriber, receive a prescription if clinically suitable, and order from a GPhC pharmacy. No waiting list, but full cost is your responsibility. Many people choose private access for speed when they're ready to start treatment. Calculate your potential weight loss with our GLP-1 calculator to help inform your decision about treatment timing.
- 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.
What is the current average cost of Mounjaro in the UK?
Private prescription costs typically range from £129 to £320 per month depending on dose. Starting doses (2.5 mg) are usually cheaper; higher maintenance doses cost more. NHS prescription costs are £9.90 per item if you're eligible. Prices have become more competitive as the market has developed.
Why does Mounjaro cost less than it did when first launched?
Competition between licensed private pharmacies has increased, and tirzepatide manufacturing has scaled up. More providers now offer Mounjaro, which drives competitive pricing. NHS approval through NICE has also normalised the treatment, encouraging market competition and better pricing transparency.
Can I get Mounjaro on the NHS, and if so, how much does it cost?
Yes, Mounjaro is now approved by NICE for specialist NHS weight management services (tier 3/4). If prescribed through the NHS, you pay the standard prescription charge (£9.90 in England for eligible patients). Access requires a GP referral and varies by region — waiting lists can be lengthy.
What's the difference between Mounjaro and Wegovy in terms of cost?
Mounjaro and Wegovy (semaglutide) are priced similarly, typically £129–£320 monthly. Mounjaro uses a dual GIP and GLP-1 mechanism and reaches higher doses (15 mg) than Wegovy (2.4 mg). Your prescriber will assess which is more suitable; cost alone shouldn't determine choice.
How do I access Mounjaro affordably in the UK?
Compare GPhC-registered pharmacies for the best private pricing. Ask about payment plans — many providers offer monthly instalments. Alternatively, pursue NHS access through your GP, which costs £9.90 per prescription but involves waiting. Use our BMI calculator to check eligibility first.
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.