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
Where Can I Get Mounjaro Cheap in the UK?
Mounjaro (tirzepatide) is available in the UK through two main routes: NHS specialist weight management services and private online prescribing. The cost and accessibility depend significantly on which route you choose. While "cheap" Mounjaro isn't assured, understanding your options — including NHS eligibility and private pricing structures — can help you find the most affordable route. This guide explains where to access Mounjaro in the UK and what to expect at each dose level.
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.
NHS Access and Eligibility for Mounjaro in the UK
NHS access to Mounjaro is free at the point of use but availability is limited and varies significantly by region. NICE has approved tirzepatide for use within NHS specialist tier 3 and tier 4 weight management services. To access NHS Mounjaro, you typically need a GP referral to your local Integrated Care Board's specialist weight management service. Eligibility generally requires a BMI of 30 kg/m² or above, or 27–29.9 with weight-related health conditions such as type 2 diabetes, high blood pressure, or sleep apnoea. However, NHS waiting lists for specialist services can be substantial — some regions report 12–24 month waits. You can check NICE guidance and ask your GP about tier 3 services in your area. Calculate your BMI using our free BMI calculator to understand your eligibility before contacting your GP.
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 Prescribing Routes and Typical Costs
Private online prescribing offers faster access to Mounjaro without NHS waiting lists. A UK-licensed prescriber assesses your suitability via online consultation, and if approved, your prescription is dispensed by a GPhC-registered pharmacy. Private costs typically range from £129–£320 per month depending on your dose — lower doses cost less. Starting doses (2.5 mg) are usually at the lower end of this range, while maintenance doses (10–15 mg) are higher. Unlike NHS access, private prescribing requires you to pay upfront, but you avoid waiting lists. Some private providers offer subscription or package options that may reduce per-month costs if you commit to longer courses. Always verify the pharmacy is GPhC-registered before paying.
- 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 free on the NHS?
Yes, Mounjaro is free through NHS specialist weight management services (tier 3/4) if you meet eligibility criteria and are referred by your GP. However, waiting times vary greatly by region, often 12–24 months. NHS provision depends on your local Integrated Care Board's commissioning decisions and current capacity.
What's the typical private cost of Mounjaro in the UK?
Private Mounjaro typically costs £129–£320 per month depending on dose. Starting doses (2.5 mg) are around £129–£150, while higher doses (10–15 mg) can reach £250–£320. Some providers offer multi-month discounts or subscription options.
How long does it take to get Mounjaro privately versus NHS?
Private prescribing is usually available within 2–7 days after your online assessment is approved. NHS access requires a GP referral to specialist services, which often involves waiting lists of several months to over a year, depending on your region.
Do I need a GP referral to get private Mounjaro?
No. Private online prescribing bypasses the GP referral system entirely. You contact a private prescriber directly, complete an online health questionnaire, have a consultation with a UK-licensed prescriber, and receive a prescription if approved — all without NHS involvement.
Is private Mounjaro the same quality as NHS Mounjaro?
Yes. Both are the same tirzepatide medication (Mounjaro KwikPen) manufactured by Eli Lilly, dispensed through GPhC-registered pharmacies. The only difference is route of access and whether you pay. Always ensure your pharmacy is GPhC-registered and your prescriber is UK-licensed.
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.