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 5ml Cost in the UK — NHS and Private Options
Mounjaro (tirzepatide) 5mg is the first standard maintenance dose after the initial titration phase. The cost varies significantly depending on whether you access it through the NHS or privately in the UK. A 5ml KwikPen containing four weekly doses costs differently across private providers, while NHS access depends on your local specialist weight management service. This guide explains UK pricing, NHS eligibility, and what affects the total cost of tirzepatide treatment.
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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.
NHS Access and Mounjaro Costs in the UK
Mounjaro on the NHS is available through tier 3 specialist weight management services, not through standard GP prescriptions. NICE has approved tirzepatide for NHS use, but availability varies significantly by region and integrated care board (ICB). When prescribed through the NHS, the medication cost is covered after your service assessment, though waiting lists can extend several months to over a year in many areas.
Private Mounjaro costs typically range from £129 to £180 per month depending on your dose and provider. A 5mg dose (the standard maintenance dose you reach after titration from 2.5mg) falls in the mid-range of private pricing. The 5ml KwikPen contains four weekly injections, making the cost approximately £32 to £45 per injection at private rates. Costs may vary between GPhC-registered online pharmacies, and some offer subscription discounts for ongoing treatment.
- NHS: Free at point of use, but referral and waiting required
- Private: £129–£180 per month for standard doses
- Titration doses (2.5mg): May cost slightly less on private routes
- Clinical assessment required before any prescription
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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.
Factors Affecting Your Mounjaro Cost in the UK
Your actual cost for Mounjaro depends on several factors. Dose escalation affects pricing: the 5mg dose is lower than higher maintenance doses (7.5mg, 10mg, 12.5mg, 15mg), so moving upward will increase monthly costs. Treatment duration matters too — some people continue indefinitely, while others use Mounjaro short-term for initial weight loss. Pharmacy choice on the private route can vary costs by £20–30 per month. Additionally, if you're eligible for NHS access and your local service provides tirzepatide, you may have a significantly shorter overall cost even with a waiting period.
Use our free GLP-1 weight loss calculator to estimate potential outcomes at different doses — understanding projected results can help you decide whether private access is worthwhile for your situation.
- 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 typical private cost for Mounjaro 5mg per month in the UK?
Private Mounjaro 5mg costs approximately £129–£180 per month depending on the provider. Each KwikPen contains four weekly injections, making the per-injection cost around £32–45. Prices may vary between GPhC-registered pharmacies, and some offer subscription discounts for ongoing treatment.
Is Mounjaro free on the NHS in the UK?
Yes, Mounjaro is free on the NHS once prescribed through a tier 3 specialist weight management service. However, you must be referred by your GP and meet eligibility criteria (BMI ≥30, or BMI ≥27 with weight-related health conditions). Waiting times for NHS access can be several months to over a year depending on your region.
Why does Mounjaro cost more at higher doses?
Mounjaro dosing ranges from 2.5mg (starting dose) to 15mg (maximum). Each dose increase typically increases the monthly cost slightly. The 5mg dose is a standard maintenance dose, but escalating to 7.5mg, 10mg, or higher will result in higher private prescribing costs.
Can I get Mounjaro prescribed through my GP in the UK?
Mounjaro is not typically prescribed by standard GP services. It must be prescribed through NHS tier 3 specialist weight management services following assessment and referral. Private Mounjaro requires an online consultation with a UK-licensed prescriber and a valid prescription from a GPhC-registered pharmacy.
Does the NHS cover Mounjaro medication costs in England, Scotland, Wales, and Northern Ireland?
Yes, the NHS covers Mounjaro costs when prescribed through approved specialist weight management services. However, availability and commissioning vary by region and ICB. Some areas may have limited access or longer waiting lists. Contact your local weight management service or ask your GP about regional availability.
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.