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 Mounjaro 10mg Cost in the UK?
Mounjaro (tirzepatide) 10mg is a prescription-only weight management injection available through both NHS specialist services and private online prescribing in the UK. The cost varies significantly depending on your access route — NHS access is free at the point of use for eligible patients, while private prescription costs typically range from £150 to £250 per month depending on the provider and whether you're receiving the 10mg dose as part of a titration schedule. Understanding your options and what to expect can help you make an informed decision about this weight loss 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.
Private Prescription Costs and Access Routes
Private prescription costs in the UK for Mounjaro vary by provider, but typically range from £150 to £300 per month depending on the specific dose and provider. At the 10mg dose level, you can expect costs towards the mid to upper end of this range. Each KwikPen contains four weeks' supply (four individual 10mg injections), so you'll usually purchase one pen per month. Many private prescribing services bundle the consultation fee with the medication cost, whilst others charge separately — typically £30 to £50 for an online clinical assessment. The 10mg dose sits within the middle of the mounjaro dose titration schedule, meaning if you're newly starting treatment, you would begin at 2.5mg and gradually increase over several weeks before reaching the 10mg maintenance dose. This staged approach helps minimise side effects and assess tolerability. Some patients may remain on lower doses if they achieve adequate weight loss, whilst others progress to the maximum 15mg dose. Prices may also vary seasonally or depend on current demand, so it's worth checking multiple providers to find the best value. Remember that tirzepatide uk pricing is entirely private — there is no standard NHS cost to the patient once prescribed through specialist services.
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 vs Private Prescription Routes
The NHS vs private route for accessing Mounjaro differs significantly in cost, waiting time, and eligibility criteria. NHS access is available through tier 3 specialist weight management services following a GP referral, and is completely free once prescribed — however, waiting lists can be several months or longer depending on your area. Private online prescription requires a completed clinical assessment questionnaire with a UK-licensed prescriber, typically completed within 24–48 hours. If approved, your prescription is sent directly to a GPhC-registered pharmacy for dispensing. NHS NICE guidance has approved tirzepatide for weight management in eligible adults, but regional ICB funding decisions mean availability varies significantly by region. Many patients opt for private prescription to avoid NHS waiting times, particularly if they've already been assessed elsewhere or want to start treatment quickly. For patients comparing options, using our free GLP-1 weight loss calculator can help you understand potential weight loss outcomes at the 10mg dose based on your starting weight.
- 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 Mounjaro available on the NHS in the UK?
Yes, Mounjaro (tirzepatide) is approved by NICE for NHS use in eligible adults with obesity or overweight with weight-related health conditions. Access is through specialist tier 3 weight management services via GP referral. Availability and waiting times vary significantly by region and ICB funding decisions.
How much does a Mounjaro 10mg prescription cost privately?
Private Mounjaro 10mg typically costs £180–£250 per month in the UK, depending on the provider. This usually includes a KwikPen with four weekly injections. Add £30–£50 for the initial online clinical assessment consultation, though many providers include this in their package price.
What's included in the monthly Mounjaro cost?
The monthly cost covers one KwikPen containing four pre-filled 10mg injection pens (one week per pen). Most private providers include ongoing prescriber support and the clinical assessment in the overall price. Some offer additional services like progress tracking or dietary guidance.
How does Mounjaro 10mg pricing compare to Wegovy in the UK?
Mounjaro and Wegovy have similar private pricing (£180–£250/month), though exact costs vary by provider. Mounjaro is a dual GIP/GLP-1 agonist, whilst Wegovy is a GLP-1 agonist only — they're not directly equivalent doses, so direct price comparison should consider the clinical strength rather than cost alone.
Can I switch from Mounjaro to Wegovy to save money?
Switching between medications is a clinical decision, not a financial one — your prescriber will assess whether it's appropriate based on your health and response to treatment. Any medication switch must be managed by your prescriber. Don't change treatments solely to save money without professional guidance.
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.