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 10mg Mounjaro Cost in the UK?
The cost of 10mg Mounjaro in the UK varies significantly depending on whether you access it through the NHS or via private prescription. On the NHS, Mounjaro is available free at point of use through specialist tier 3 weight management services, though access and waiting times vary by region. Privately, a single 10mg KwikPen typically costs between £140 and £200. This guide explains both routes, eligibility criteria, and how your weight loss journey might progress with this dose. Use our free GLP-1 weight loss calculator to estimate potential results at the 10mg dose.
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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.
NHS Access to Mounjaro 10mg and Private Pricing
NHS route: Mounjaro is provided free through NICE-approved specialist weight management services. You must be referred by your GP to a tier 3 or tier 4 service, where a multidisciplinary team assesses your eligibility. The 10mg dose is reached gradually — you start at 2.5mg and escalate weekly, so reaching 10mg takes approximately 12–16 weeks. During this time, you receive NHS prescriptions at no cost. However, NHS availability is limited and varies significantly by region (ICB), with some areas having waiting lists of 6–18 months. Private route: Through private online prescribing services, 10mg Mounjaro KwikPens are typically priced at £140–£200 per pen. Each KwikPen contains 4 weekly doses, so monthly costs range from £280–£400 depending on the provider and whether you're buying single pens or multi-month supplies. A licensed UK prescriber reviews your medical history and issues a prescription if appropriate; no NHS referral is needed. Dispensing is handled by a GPhC-registered pharmacy. This route offers faster access but requires private payment.
- NHS: Free through specialist services but with regional waiting lists
- Private: £140–£200 per KwikPen (4 weeks supply)
- Starting dose is 2.5mg; 10mg is typically reached after 12–16 weeks of escalation
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.
What to Expect at 10mg Mounjaro and the Dose Titration Process
The 10mg dose is an escalation dose in the Mounjaro titration schedule, not the starting point. Most users begin at 2.5mg, then move to 5mg after 4 weeks, 7.5mg after 8 weeks, 10mg after 12 weeks, and potentially up to 12.5mg or 15mg if tolerated. Clinical trial data shows that at the 10mg dose, participants on average lost approximately 19.5% of their body weight over 72 weeks, alongside a reduced-calorie diet and increased physical activity. Individual results vary significantly. Common side effects at higher doses include nausea, diarrhoea, constipation, and stomach pain — most side effects tend to reduce over time as your body adjusts. If you reach 10mg and experience intolerable side effects, your prescriber may lower your dose or explore alternative approaches. Calculate your estimated weight loss at different doses using our free GLP-1 weight loss calculator.
- 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.
Can I get 10mg Mounjaro free on the NHS?
Yes, if you're accepted into a specialist tier 3 weight management service. You'll receive Mounjaro free at each dose level, including 10mg, but access varies by region. Your GP must refer you, and waiting times can be lengthy. Check your local ICB (Integrated Care Board) website for current availability and waiting times in your area.
How much does 10mg Mounjaro cost privately in the UK?
A single 10mg KwikPen typically costs £140–£200 privately through UK online prescribing services. Each pen contains 4 weekly doses, so monthly costs range from £280–£400. Prices vary by provider. Always use a GPhC-registered pharmacy to ensure legitimacy and safety.
How long does it take to reach the 10mg dose?
Mounjaro uses a gradual dose escalation schedule. Starting at 2.5mg, you increase by one dose level every 4 weeks: 2.5mg → 5mg → 7.5mg → 10mg. Reaching 10mg typically takes 12 weeks, plus an additional 4 weeks at the previous dose if you need to stabilise before escalating.
How much weight can I expect to lose at 10mg Mounjaro?
Clinical trials (SURMOUNT-1) showed that participants on 10mg lost an average of approximately 19.5% of their body weight over 72 weeks, alongside lifestyle changes. However, individual results vary considerably. Some people lose more, others less. Your personal weight loss depends on your starting weight, lifestyle adherence, and individual response.
What's the difference between NHS and private Mounjaro prescriptions?
NHS prescriptions are free but involve waiting for specialist referral and assessment — timelines vary by region. Private prescriptions cost £140–£200 per pen but are faster and don't require NHS referral. Both routes require a valid prescription from a licensed UK prescriber; neither route offers Mounjaro "off the shelf" without clinical assessment.
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.