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 Discount Codes and Cost Reduction in the UK
If you're looking for Mounjaro discount codes in the UK, it's important to understand how this prescription-only medication is priced and accessed. Mounjaro (tirzepatide) is a once-weekly injection licensed for weight management in UK adults, but costs and savings options vary significantly depending on whether you're accessing it through the NHS or private prescription. This guide explains what you need to know about pricing, patient assistance, and how to find affordable options while ensuring you're getting safe, legitimate treatment.
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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.
How Mounjaro Pricing Works in the UK
Mounjaro is a prescription-only medicine and pricing depends entirely on your access route. Through the NHS, if you qualify for specialist weight management services, Mounjaro may be available with no direct cost at point of use (though NHS provision varies significantly by region). Through private online prescribing services, Mounjaro typically costs between £129 and £320 per month depending on your dose — starting at 2.5 mg and increasing up to the maximum of 15 mg per week.
Each KwikPen contains four weekly doses. Prices reflect dose escalation: lower starting doses cost less, and costs increase as your prescriber adjusts your dose upward. Unlike some cosmetic treatments, there are no legitimate "discount codes" in the traditional sense for Mounjaro in the UK. Instead, cost management comes through official channels: NHS access (if eligible), direct pharmacy pricing comparison, and patient assistance programmes run by the manufacturer, Eli Lilly.
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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.
Official Support and Legitimate Cost Options
Eli Lilly, the manufacturer of Mounjaro (tirzepatide), offers patient support programmes in some countries, though UK-specific programmes vary. Always check the official Mounjaro UK website or ask your prescriber about any legitimate patient assistance available. When accessing Mounjaro privately, compare prices across accredited GPhC-registered pharmacies — costs do vary by provider. Use our free GLP-1 weight loss calculator to estimate potential outcomes at different doses, which can help you make an informed decision about whether the investment is right for you. Never purchase Mounjaro from unregistered sellers or without a valid UK prescription — counterfeit products exist and pose serious health risks.
- 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.
Are there real Mounjaro discount codes I can use in the UK?
There are no standard "discount codes" for Mounjaro like you might find for retail products. Pricing is set by pharmacies and manufacturers. However, costs vary between private providers, so comparing prices across GPhC-registered pharmacies may reveal better rates. Always purchase through legitimate channels with a valid prescription.
Is Mounjaro cheaper on the NHS than privately?
Through NHS specialist weight management services, Mounjaro may be available at no direct cost if you meet eligibility criteria. However, NHS access varies by region and often involves waiting lists. Private access is immediate but costs £129–£320 per month depending on dose.
What is the tirzepatide starting dose and does it cost less?
The starting dose is 2.5 mg weekly, which typically costs less than higher maintenance doses. Your prescriber will gradually increase your dose over several weeks. Starting at a lower dose is safer and more cost-effective, though reaching your target dose takes time.
How does Mounjaro compare to Wegovy in terms of cost?
Mounjaro and Wegovy (semaglutide) have similar price ranges privately (£129–£320/month), but doses differ. Mounjaro starts at 2.5 mg and goes up to 15 mg, whilst Wegovy starts at 0.25 mg and tops at 2.4 mg. Your prescriber will advise which is suitable based on your health.
Should I buy Mounjaro from overseas to save money?
No. Only purchase Mounjaro with a UK prescription from a GPhC-registered pharmacy. Overseas purchases bypass safety checks, may be counterfeit, and aren't covered by UK medical supervision. Your GP or prescriber can discuss legitimate affordable options with you.
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.