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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How Much Does 10 mg Mounjaro Cost in the UK?
The cost of 10 mg Mounjaro (tirzepatide) in the UK varies significantly depending on whether you access it through the NHS or a private online prescription service. On the private market, a single 10 mg KwikPen typically costs between £150–£200, though prices vary by provider and any subscription packages offered. NHS access is available through specialist tier 3 weight management services in some regions, though availability and waiting times differ considerably across the country. Understanding both routes — and what affects pricing — helps you make an informed decision about whether Mounjaro is accessible and right for you.
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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.
Private Mounjaro Pricing and What Affects the Cost
In the UK private market, 10 mg Mounjaro (tirzepatide) generally costs between £150–£200 per KwikPen, though this varies between GPhC-registered online pharmacies and prescribing services. Each KwikPen contains four weekly injections, so a single pen represents one month of treatment. Some key factors affecting price include: prescriber consultation fees (typically £20–£50), whether you're switching from a lower dose or starting fresh, bulk purchasing options, and pharmacy markup. Many private services offer subscription or repeat prescription discounts, which may reduce the per-dose cost over time. It's worth comparing providers, as pricing and service quality vary. When calculating your actual cost, remember that dose titration means you may spend several weeks on lower doses (5 mg or 7.5 mg) before reaching 10 mg, so initial total costs may be lower than ongoing maintenance costs.
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.
NHS Access to Mounjaro and Regional Availability
NHS access to Mounjaro (tirzepatide) is available through specialist tier 3 weight management services, and NICE has approved its use within the NHS. However, availability varies significantly by region — some integrated care boards (ICBs) have active programmes, whilst others have long waiting lists or limited capacity. To access Mounjaro on the NHS, you typically need a GP referral to your local specialist weight management service. Eligibility criteria align with private access: BMI ≥30, or BMI 27–29.9 with weight-related health conditions. Waiting times for NHS specialist services can range from several months to over a year in some areas. If NHS access is unavailable or waiting times are prohibitive, private prescription remains an alternative — though this requires upfront payment and a private clinical assessment.
- 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.
Why does 10 mg Mounjaro cost more than lower doses?
The 10 mg dose typically costs the same per KwikPen as 5 mg or 7.5 mg — pricing is usually based on the pen itself, not the dose concentration. However, your total treatment cost increases if you're on 10 mg long-term compared to staying on a lower dose. Some services may charge consultation fees separately for dose escalations.
Can I get 10 mg Mounjaro on the NHS for free?
Yes, if you're eligible and referred to an NHS specialist tier 3 weight management service with an active Mounjaro programme in your area. However, NHS availability is limited and varies by region. Your GP can advise whether your local service currently prescribes tirzepatide and what the waiting time is.
Is 10 mg the maximum Mounjaro dose?
No. The maximum Mounjaro dose is 15 mg once weekly. 10 mg is an intermediate escalation dose — many people stabilise on this dose, whilst others titrate up to 12.5 mg or 15 mg depending on clinical response and side effects. Dose titration typically takes 16–20 weeks to reach 10 mg from the starting dose.
What's included in the £150–£200 price for a 10 mg KwikPen?
The price typically covers the pre-filled KwikPen device (four doses for one month). Prescription fees, consultation fees with the prescriber, and delivery costs may be additional — check with your chosen provider for a full breakdown before ordering.
How does Mounjaro 10 mg cost compare to Wegovy?
Pricing is broadly similar between Mounjaro and Wegovy — both are typically £150–£200 per month in the UK private market. However, Wegovy has a lower maximum dose (2.4 mg), so direct dose comparison isn't straightforward. Both require prescription and clinical assessment. Your GLP-1 weight loss calculator can help you understand potential outcomes at different doses.
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.