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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Mounjaro Discounts and Costs in the UK
Mounjaro (tirzepatide) is a prescription-only weight management injection available in the UK through both NHS specialist services and private online prescribing routes. Unlike some medications, Mounjaro itself doesn't typically offer manufacturer discounts in the UK, but costs vary significantly depending on whether you access it through the NHS or privately. Understanding your options, eligibility criteria, and what each route involves will help you make an informed decision about whether this medication is right for you.
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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.
NHS Access to Mounjaro in the UK
NICE approval: The National Institute for Health and Care Excellence (NICE) has approved tirzepatide (Mounjaro) for use within NHS specialist tier 3 and tier 4 weight management services for eligible adults. However, NHS access is not routinely available through your GP — you must be referred to a specialist weight management service.
NHS eligibility: You may be eligible for NHS Mounjaro if you have a BMI of 30 or above, or 27 to 29.9 with weight-related health conditions such as type 2 diabetes, prediabetes, high blood pressure, or cardiovascular disease. For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, lower BMI thresholds (27.5+) may apply.
Regional variation: Availability and waiting times vary significantly across ICBs (Integrated Care Boards). Some regions have established tier 3 services with relatively accessible pathways; others have very long waiting lists or limited availability. Your GP can advise on local provision.
No NHS cost: If prescribed through NHS tier 3 services, there is no direct medication cost — it is dispensed under prescription exemptions (or you pay the standard prescription charge of approximately £9.90 per item in England).
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.
Private Mounjaro Access and UK Pricing
Private Mounjaro is available through UK-registered online pharmacies following a clinical assessment by a UK-licensed prescriber. Private costs typically range from £129 to £320+ per month depending on the dose and provider — higher doses cost more. A Mounjaro KwikPen contains 4 weekly injections, so costs are usually quoted per pen or per month. Costs do not typically include "discounts" in the traditional sense, but some providers may offer:
- Bulk purchase discounts (3–6 month packages)
- Loyalty schemes or repeat customer rates
- Price matching with competitors
- Payment plan options
Always compare providers and ensure the pharmacy is GPhC-registered before purchasing.
NHS vs private: The NHS route is free (or one prescription charge) but involves waiting times and geographic variation in availability. Private access is faster and does not require NHS referral, but costs significantly more per month. Calculate your personal BMI using our free BMI calculator above to check your eligibility first, and discuss options with your GP or a licensed 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.
Can I get Mounjaro on the NHS for free?
Yes, Mounjaro is available on the NHS through tier 3 specialist weight management services for eligible adults. If prescribed through the NHS, you pay no medication cost (or one standard prescription charge of around £9.90 in England). However, NHS availability varies significantly by region, and waiting times can be long.
How much does Mounjaro cost privately in the UK?
Private Mounjaro typically costs £129 to £320+ per month depending on dose. A KwikPen contains 4 weekly injections. Some providers offer bulk discounts for 3–6 month packages, but there is no standard "discount" programme. Always check that your provider is GPhC-registered.
What is the difference between NHS and private Mounjaro?
The medication itself is identical. The difference is access: NHS requires referral to tier 3 services (free or £9.90 per prescription, but long waits) versus private prescribing (faster access, higher cost, no referral needed). Both require clinical assessment.
Am I eligible for Mounjaro on the NHS?
You may be eligible if you have a BMI of 30+, or 27 to 29.9 with weight-related health conditions (diabetes, hypertension, cardiovascular disease). Lower BMI thresholds apply for South Asian, Chinese, Black African, and Black Caribbean adults. Your GP can assess your individual eligibility.
Does Mounjaro have manufacturer discounts in the UK?
Mounjaro (made by Eli Lilly) does not have routine manufacturer discount programmes in the UK. However, some private pharmacies may offer package discounts or payment plans. Always compare prices across GPhC-registered pharmacies and ask about available pricing options.
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.