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 UK Pricing: Cost and How to Access Treatment
Mounjaro (tirzepatide) is available in the UK through both NHS specialist services and private prescription routes, but costs vary significantly depending on which pathway you choose. This guide explains current UK pricing, how to access Mounjaro, what to expect during an online clinical assessment, and the key differences between NHS and private options. Understanding your options helps you make an informed decision about weight loss treatment that fits your circumstances and budget.
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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 Cost in the UK: NHS vs Private Pricing
NHS access: Mounjaro may be available through specialist tier 3/4 weight management services in your region, but NHS prescription costs follow standard NHS charges — currently £9.90 per item on prescription (or free if you're exempt). However, NHS access is limited and availability varies significantly by region and ICB (Integrated Care Board). Waiting lists for NHS specialist services can be several months to over a year in many areas.
Private prescription costs: Through private online prescribing services, Mounjaro typically costs between £130–£320 per month depending on your dose. Lower doses (2.5–5 mg) are usually £130–£180 monthly, while higher maintenance doses (10–15 mg) range from £220–£320 monthly. These prices include the clinical assessment, prescription, and dispensing by a GPhC-registered pharmacy. Individual pricing varies between providers. A KwikPen contains 4 weekly injections, so costs are usually quoted per month or per pen.
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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.
NHS Referral vs Private Online Route: What to Expect
NHS route: Ask your GP for a referral to your local specialist weight management service. You'll be assessed for eligibility, placed on a waiting list, and if approved, receive Mounjaro through the NHS at standard prescription cost. This requires your GP to believe tier 3 services would be appropriate for you.
Private route: Complete an online health questionnaire with a UK-licensed prescriber. If approved following clinical assessment, you receive a prescription dispensed by a GPhC-registered pharmacy within 24–48 hours. No GP referral needed. Our free GLP-1 weight loss calculator can help you estimate potential outcomes at different doses before committing.
- 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 available on the NHS in the UK?
Yes, Mounjaro (tirzepatide) is approved by NICE for use through NHS specialist weight management services, but availability is limited and varies by region. You'll need a GP referral to tier 3 services, and waiting lists can be very long. Private prescription is available without NHS referral for those who prefer faster access.
How much does a Mounjaro KwikPen cost privately?
Private pricing ranges from approximately £130–£320 per month depending on your dose. A KwikPen contains 4 weekly injections (one month's supply). Lower starting doses cost less; maximum doses (15 mg) cost more. Prices include the clinical assessment and pharmacy dispensing.
Do I need a GP's permission to get a private Mounjaro prescription?
No. You can obtain a private prescription directly through an online clinical assessment with a UK-licensed prescriber without involving your GP. However, it's advisable to inform your GP that you're starting Mounjaro, especially if you're taking other medications.
What's included in the private Mounjaro cost?
Private costs typically include the online consultation fee, the prescription, dispensing, and delivery. Some providers bundle all costs into a monthly fee; others charge separately. Always check whether the quoted price includes the assessment and pharmacy fee before ordering.
Can I switch from private to NHS Mounjaro later?
Potentially, yes. If you're on private Mounjaro and your circumstances change, you could ask your GP about NHS referral to specialist services. However, NHS waiting lists are long and regional availability varies. Discuss transition options with your GP if cost becomes a concern.
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.