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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10 Mg Mounjaro Price vs Wegovy — What You'll Pay in the UK
The 10 mg dose is one of the mid-range escalation doses for Mounjaro (tirzepatide) weight loss treatment. Whether you're comparing Mounjaro costs to Wegovy (semaglutide), understanding UK pricing is essential for making informed decisions. NHS access and private pricing differ significantly, and both medications require a prescription following clinical assessment. This guide explains the costs, what influences pricing, and how the two medications compare beyond just price—including trial data, mechanisms of action, and individual suitability. Use our free GLP-1 weight loss calculator to estimate potential outcomes before committing to treatment.
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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.
Mounjaro 10 Mg vs Wegovy: Trial Data, Mechanisms, and Cost Comparison
Mounjaro (tirzepatide) at 10 mg is typically reached after 8–12 weeks of dose escalation, starting from 2.5 mg. Based on the SURMOUNT-1 clinical trial, the 10 mg dose is associated with approximately 19.5% average body weight loss over 72 weeks when combined with diet and exercise changes.
Wegovy (semaglutide) reaches its maximum licensed dose of 2.4 mg after 16–20 weeks of escalation. STEP-1 trial data shows approximately 14.9% average body weight loss at the highest dose over 68 weeks alongside lifestyle changes.
The key difference: Mounjaro uses dual GIP and GLP-1 receptor agonist mechanisms (targeting two hormone pathways), whilst Wegovy is a GLP-1-only agonist (single pathway). Trial data suggests this dual mechanism may contribute to slightly higher average weight loss, though individual results vary considerably. Your prescriber will assess which is more suitable for your health profile and circumstances.
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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.
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UK Pricing: NHS Access vs Private Mounjaro and Wegovy Costs
NHS access: Both Mounjaro and Wegovy are available through NICE-approved tier 3 specialist weight management services, but availability varies significantly by region (ICB). Waiting lists can extend months to years in many areas. If approved, there is no direct cost to you on the NHS.
Private prescribing: Mounjaro 10 mg typically costs £180–£220 per month through UK-licensed online prescribers, depending on the provider. Wegovy at equivalent doses (1.7 mg) costs roughly £150–£200 monthly. Prices vary based on the pharmacy, whether you're a new or returning patient, and bulk purchase options. Always verify you're using a GPhC-registered pharmacy and a UK-licensed prescriber. Neither medication is available over the counter—a clinical assessment is always required, whether through NHS or private routes.
- 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 10 mg Mounjaro the maximum dose?
No. The 10 mg dose is a mid-range escalation step. Mounjaro continues to escalate to 12.5 mg and finally 15 mg (the maximum licensed dose). Most patients begin at 2.5 mg and increase by 2.5 mg every 4 weeks, reaching 10 mg around week 12–16 of treatment.
Is Mounjaro more expensive than Wegovy in the UK?
Slightly, yes. Mounjaro 10 mg typically costs £180–£220 per month privately, whilst Wegovy at equivalent strength (1.7 mg) ranges £150–£200. Costs vary by pharmacy and provider. NHS costs are zero if approved through specialist services, but access is limited and region-dependent.
Which caused more weight loss in clinical trials—Mounjaro or Wegovy?
Mounjaro (SURMOUNT trial) showed approximately 19.5% average loss at 10 mg, whilst Wegovy (STEP-1) showed approximately 14.9% at maximum dose. However, these are trial averages; individual results vary significantly based on genetics, adherence, diet, and lifestyle changes. Your prescriber will discuss realistic expectations.
Can I switch from Wegovy to Mounjaro?
Yes, switching is possible, but it must be managed by your prescriber. There is no official conversion chart, though approximate equivalence exists (Wegovy 1.7 mg ≈ Mounjaro 10 mg roughly). Any switch requires a new clinical assessment and prescription.
Do I need a prescription for either Mounjaro or Wegovy in the UK?
Yes, both are prescription-only medicines. You cannot buy them without a valid UK prescription from a licensed prescriber. This applies whether you access them through the NHS or private online prescribing services. A clinical assessment is always required first.
Ready to take control of your weight loss journey?
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