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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10mg Mounjaro Cost vs Wegovy — What You Need to Know
If you're considering 10mg Mounjaro or Wegovy for weight management in the UK, cost is often a key factor. Both prescription-only medications are available through NHS specialist services or private prescribing, but pricing, dose availability, and what's covered vary significantly. This guide compares the costs and helps you understand what affects the price you'll pay. Use our GLP-1 weight loss calculator to explore potential outcomes with either medication before discussing costs with your prescriber.
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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.
10mg Mounjaro vs Wegovy — Cost and Mechanism Comparison
At 10mg, Mounjaro (tirzepatide) is an escalation dose within the 2.5–15mg range, typically reached after 12+ weeks of treatment. Wegovy uses a different dosing schedule — 0.25mg to 2.4mg — so a direct 10mg comparison isn't applicable; 10mg Mounjaro is closest to Wegovy's maximum 2.4mg dose in terms of therapeutic intensity.
Clinical trial context: In the SURMOUNT-1 trial, 10mg Mounjaro showed average weight loss of approximately 19.5% body weight over 72 weeks. Wegovy's STEP-1 trial showed approximately clinically studied weight loss at its maximum 2.4mg dose. However, individual results vary significantly, and these are trial averages alongside reduced-calorie diet and increased physical activity.
Key mechanism difference: Mounjaro is a dual GIP + GLP-1 receptor agonist (activating two hormone pathways), while Wegovy is a GLP-1-only receptor agonist. This dual mechanism may contribute to Mounjaro's slightly larger average weight loss in trials, but prescriber assessment determines which is suitable for you.
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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
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UK Pricing — NHS vs Private Cost
NHS access: Both Mounjaro and Wegovy are available through NHS specialist tier 3 weight management services, though regional availability varies significantly. If prescribed through the NHS, there is no direct cost to you (except standard prescription charges, currently £9.65 per item in England). However, waiting times for NHS specialist services can be several months to over a year depending on your area.
Private access: Private online prescribing for both medications typically costs £129–£320 per month depending on dose, provider, and whether you're on a dose escalation protocol. A 10mg Mounjaro KwikPen (4 weeks supply) costs approximately £180–£250 privately. Wegovy at equivalent doses costs similarly. Prices vary between GPhC-registered providers. Neither is covered by standard private health insurance. Use our BMI calculator to confirm your eligibility before seeking a private prescription.
What affects the cost you pay: Dose escalation protocols cost more if you're increasing doses weekly (you pay for each dose step); established maintenance doses cost less per month. Some providers offer subscription discounts for ongoing treatment. Private prescribing includes the online consultation fee (typically £30–£50), which is not charged through the NHS. Costs may increase if you require more frequent monitoring or additional consultations with your prescriber.
- 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 10mg Mounjaro available on the NHS in the UK?
Yes, Mounjaro is NICE-approved and available through NHS specialist weight management services (tier 3). However, it's not a standard GP prescription — you need referral to a specialist service. NHS availability and waiting times vary significantly by region. Your GP can refer you if you meet eligibility criteria (BMI ≥30 or BMI ≥27.5 with weight-related health conditions).
How much does 10mg Mounjaro cost privately in the UK?
Private 10mg Mounjaro typically costs £180–£250 per KwikPen (4-week supply) through GPhC-registered online pharmacies, plus an online consultation fee (£30–£50). Total monthly cost is usually £210–£300 depending on provider. Prices vary, so comparing providers is recommended. This includes the prescription from a UK-licensed prescriber.
Is Wegovy cheaper than 10mg Mounjaro?
Pricing is similar between the two medications at equivalent doses through private prescribing (both typically £129–£320/month). The 2.4mg Wegovy dose is approximate to 10mg Mounjaro in terms of therapeutic effect, though they're different molecules. NHS costs are identical (standard prescription charges). Your prescriber decides which is more suitable for you based on your health profile.
What's the difference between Mounjaro and tirzepatide?
Mounjaro is the brand name for tirzepatide. They're the same medication — tirzepatide is the active ingredient, Mounjaro is how it's marketed in the UK. The KwikPen device contains tirzepatide at doses from 2.5mg to 15mg. Both terms are used interchangeably in medical settings.
Can I get Mounjaro on prescription without paying privately?
Yes — through NHS specialist weight management services following GP referral. You'll pay standard NHS prescription charges (£9.65 per item in England as of 2024) if eligible. However, accessing NHS Mounjaro involves waiting for specialist assessment, which can take several months depending on your region. Private prescribing offers faster access but costs £180–£300/month.
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