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 10ml in the UK — Cost and How to Access It
Mounjaro 10ml is a mid-range dose of tirzepatide, the prescription-only weight management injection manufactured by Eli Lilly. At 10mg, this dose is typically reached after several weeks of dose titration, and represents a maintenance or escalation dose for many UK users. Understanding the cost and access routes — both NHS and private — is essential for making an informed decision about whether this medication is right for you.
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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.
Private Cost and Pricing Context in the UK
Private prescription cost: A 10mg Mounjaro KwikPen (single 4-week supply) typically costs between £180–£280 through UK private prescribing services, depending on the provider. Monthly costs therefore range from approximately £720–£1,120 for four pens (one month's supply). Some providers offer tiered pricing or bundled consultation packages that may reduce the per-dose cost.
Compared to other GLP-1 weight loss injections, Mounjaro's cost is broadly similar to Wegovy at equivalent doses. The dose titration process means that most users spend 4–6 weeks at lower doses (2.5mg, 5mg, 7.5mg) before reaching 10mg, so initial monthly costs may be lower. Annual private treatment costs at 10mg are typically between £8,600–£13,400.
- Prices vary between providers and may include or exclude consultation fees
- Some private clinics offer subscription models with discounted repeat supplies
- Costs do not include follow-up appointments or additional GP support
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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 Routes Explained
NHS access: Mounjaro is available through NHS specialist weight management services (tier 3 or 4) in some regions, but access is limited and highly variable. NHS prescription would be free once initiated by a specialist service, but waiting lists can extend 6–18+ months depending on your ICB area. You must be referred by your GP and meet NICE eligibility criteria.
Private access: Available immediately following an online clinical assessment with a UK-licensed prescriber. The process typically takes 24–48 hours from consultation to prescription. You do not need an NHS referral. Private prescriptions are dispensed by GPhC-registered pharmacies. This route offers faster access but at personal cost.
- Private route does not affect future NHS eligibility
- Both routes require individual clinical assessment and suitability confirmation
- 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.
How much does a 10mg Mounjaro KwikPen cost on the NHS?
Mounjaro on the NHS is free once prescribed by a specialist weight management service. However, NHS access is limited and requires referral from your GP to a tier 3 specialist service. Availability and waiting times vary significantly by region. Private access is generally faster (24–48 hours) but costs £180–£280 per pen.
What is the difference between Mounjaro 10mg and lower doses in terms of cost?
Cost per pen is generally the same across all Mounjaro doses (2.5mg through 15mg), typically £180–£280 per KwikPen. During dose titration, you may start at lower doses (2.5mg or 5mg) for 4 weeks each, so your initial monthly costs may be lower before reaching 10mg maintenance dose.
Is Mounjaro 10ml the standard maintenance dose?
Mounjaro is administered in doses from 2.5mg to 15mg. The 10mg dose is a mid-range escalation or maintenance dose, typically reached after 8–12 weeks of treatment. Some users remain at 10mg while others escalate further. Your prescriber will determine the appropriate dose for your individual clinical response.
Can I switch from private Mounjaro to NHS Mounjaro?
Yes, receiving private Mounjaro does not affect your future eligibility for NHS weight management services. However, switching routes may involve a gap in treatment. If you are considering NHS access, discuss timing with your GP. Use our GLP-1 weight loss calculator to track potential outcomes at different doses.
What additional costs should I expect with private Mounjaro?
Private Mounjaro costs typically include the pen itself (£180–£280) plus any consultation fee (often £50–£200 for initial assessment). Repeat supplies may have lower consultation costs. Follow-up appointments with your GP, blood tests, or monitoring are separate. Always confirm the full cost structure with your chosen provider before starting treatment.
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.