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
Free tracker included with every download this week
Will Mounjaro Price Come Down in the UK?
Mounjaro (tirzepatide) prices in the UK remain high, but there are several reasons why costs might decrease over time. Currently, private prescriptions cost between £129 and £320 per month depending on dose and provider, while NHS access is limited to specialist weight management services. This guide covers what influences Mounjaro pricing, current access routes, and realistic expectations for future cost changes.
10,000+ calculations today · NHS-aligned thresholds · 100% free
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.
What Affects Mounjaro Pricing in the UK?
Mounjaro prices depend on several factors that determine whether costs will fall. Patent protection is significant—tirzepatide is patent-protected until at least 2032, meaning cheaper generic versions won't become available for several years. Manufacturing scale affects pricing: as demand grows, production costs may decrease, potentially lowering prices. NHS commissioning plays a role too—when NICE approves medications for broader NHS use, bulk purchasing power typically reduces costs. Currently, NHS access to Mounjaro is through specialist tier 3 weight management services, which limits availability. Market competition also matters: if other GIP/GLP-1 medications enter the UK market, Mounjaro prices may become more competitive. Private providers currently charge different amounts based on dose titration protocols and clinical assessment fees.
- Patent expiration (2032 or later) is the main factor for generic pricing
- NHS NICE approval for wider access could reduce costs through bulk purchasing
- Manufacturing efficiency improvements may lower private prescription fees
- Competitive pressure from similar medications may drive prices down
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.
Current Mounjaro Pricing and Access Routes
Private prescription costs in the UK typically range from £129–£320 per month, depending on your dose and the provider. Starting doses (2.5 mg) are usually cheaper than maintenance doses (15 mg). NHS access is free at point of care but requires referral to a specialist weight management service—availability varies significantly by region and waiting lists can be long. For comparison, Wegovy (semaglutide) prices are similar or slightly lower at some providers. Calculate your estimated weight loss and medication costs using our free GLP-1 weight loss calculator, which helps you understand both potential outcomes and investment. As tirzepatide becomes more widely prescribed and production scales, private providers may adjust prices downward to remain competitive, though this depends on broader market factors.
- 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.
When will generic Mounjaro (tirzepatide) become available in the UK?
Generic tirzepatide is unlikely before 2032 at the earliest, due to patent protection. Once patents expire, generic versions may become available, potentially reducing costs significantly. NHS bulk purchasing may also lower prices before then if NICE approves wider access.
Is Mounjaro cheaper on the NHS than private prescription?
Yes, Mounjaro on the NHS is free at point of care, but access is limited to specialist weight management services with often lengthy waiting lists. Private prescriptions currently cost £129–£320 monthly depending on dose. Your GP can refer you to specialist services.
Why is Mounjaro so expensive compared to other weight loss medications?
Mounjaro's cost reflects its dual GIP/GLP-1 mechanism, which is newer than single GLP-1 medications like Wegovy. Patent protection, manufacturing scale, and limited competition currently support higher pricing. As the market develops, costs may decrease.
Will Mounjaro prices drop if I wait to start treatment?
Prices may gradually decrease, but waiting carries risks—weight regain is common, and health complications from obesity may worsen. Starting treatment now and potentially switching to cheaper alternatives later is often more beneficial than delaying care.
How does Mounjaro cost compare to Wegovy in the UK?
Mounjaro and Wegovy private prescription costs are similar, typically £129–£320 monthly depending on dose and provider. Both are prescription-only and require clinical assessment. Your prescriber can advise which is more suitable based on your health profile and eligibility.
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.