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 Come Down In Price in the UK?
Mounjaro (tirzepatide) remains one of the most expensive weight loss injections available in the UK, with private prescriptions typically costing £129–£320 per month depending on dose. Whether prices will fall depends on several factors: patent timelines, NHS coverage expansion, generic alternatives, and market competition. Currently, NHS access is limited to specialist tier 3 weight management services with significant regional variation. Understanding current pricing and future cost factors can help you plan your weight management options.
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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.
Current Mounjaro Pricing and NHS Access in the UK
Private prescription costs for Mounjaro in the UK range from approximately £129 per month at the starting 2.5 mg dose to £280–£320 monthly at the maximum 15 mg dose, depending on your prescriber and pharmacy. Prices vary because different online prescribing services and pharmacies set their own fees.
NHS access is currently available through specialist tier 3 weight management services, but availability remains extremely limited. Many NHS regions have long waiting lists or do not yet offer tirzepatide through the NHS. You would typically need a GP referral to a specialist weight management service, and even then, access depends on your BMI, health conditions, and local ICB (Integrated Care Board) commissioning decisions. Our free BMI calculator can help you check whether you might meet NHS eligibility thresholds, though your GP will make the final assessment.
MHRA status: Mounjaro carries additional MHRA monitoring (Black Triangle ▼ status), which may influence future pricing and availability decisions as safety data accumulates.
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.
Factors That Could Affect Mounjaro Prices in the Future
Patent expiry: Tirzepatide's patent protections will eventually expire, potentially allowing generic versions to enter the market and lower prices significantly — though this is likely years away.
NHS expansion: If NICE and NHS England commission Mounjaro more widely across weight management services, bulk purchasing power could reduce NHS costs, though private prices may not fall immediately.
Market competition: As more GLP-1 and dual GIP/GLP-1 medications become available in the UK, competition may eventually influence pricing. Wegovy and Saxenda already offer alternative options, though each has different efficacy profiles and costs.
Supply and demand: High demand for weight loss injections continues to outstrip supply in many regions, which currently supports higher pricing. If demand normalises or supply increases, prices may adjust.
- 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?
Mounjaro is available through NHS specialist tier 3 weight management services, but access is extremely limited and varies by region. Many areas have waiting lists of months or longer. You need a GP referral and must meet specific BMI and health criteria. Check with your GP about local availability.
How much does Mounjaro cost privately in the UK?
Private Mounjaro prescriptions typically cost £129–£320 per month depending on the dose (starting at 2.5 mg, maximum 15 mg). Prices vary between prescribers and pharmacies. Use our GLP-1 weight loss calculator to explore potential outcomes and compare medication options.
Will Mounjaro prices drop when it becomes generic?
Generic tirzepatide could significantly lower prices, but this is unlikely for several years due to patent protection. Once generics become available, NHS costs may decrease first, followed eventually by private sector pricing.
What's the difference between Mounjaro and Wegovy pricing in the UK?
Wegovy (semaglutide) typically costs £129–£280 monthly at the maximum dose, similar to Mounjaro's mid-to-high-dose pricing. However, Mounjaro may offer greater average weight loss in clinical trials, so cost-benefit varies individually. Compare with your prescriber.
Can I access Mounjaro more cheaply through the NHS?
NHS prescriptions are free once issued, but NHS access itself is limited and waiting lists are long. Many patients access Mounjaro privately faster than through NHS routes. Ask your GP about tier 3 referral options in your region and typical waiting times. ```
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.