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 Payment Options in the UK
If you're searching for a Mounjaro discount code in the UK, you should know that this prescription-only injection is not typically available through standard discount codes or vouchers. However, there are legitimate ways to access Mounjaro affordably, including NHS routes and private prescription options with varying costs. This guide explains how Mounjaro pricing works in the UK, what to expect, and how to find the most cost-effective access route for your situation.
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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 (tirzepatide) is a prescription-only weight loss injection available in two ways in the UK: through NHS specialist services or private prescribing.
NHS access: If prescribed through the NHS, Mounjaro is typically free under normal prescription charges. However, access is limited to specialist tier 3/4 weight management services, and eligibility varies significantly by region. Some NHS integrated care boards (ICBs) do not currently offer tirzepatide, and waiting lists can stretch months or even years in many areas.
Private access: Through GPhC-registered online pharmacies following a clinical assessment, Mounjaro costs range from approximately £130–£320 per month depending on your dose. Each KwikPen contains 4 doses (4 weeks supply). Higher doses cost more than lower doses, as you pay per milligram of tirzepatide.
There are no official discount codes or vouchers for Mounjaro in the UK — any offers claiming to provide coupons should be a UK pharmacy with caution.
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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.
Finding the Most Affordable Route for You
The most cost-effective way to access Mounjaro depends on your circumstances. If you're eligible for NHS treatment, this is free — the barrier is availability and waiting time, not cost. To explore NHS access, ask your GP for a referral to your local specialist weight management service and enquire specifically about tirzepatide availability in your area.
If you're pursuing private treatment, compare the total cost across different providers, as prices vary. Some private prescribers offer lower costs for patients willing to commit to longer-term treatment plans. Remember that Mounjaro works best alongside a reduced-calorie diet and increased physical activity — these lifestyle changes are free and essential regardless of access route. Use our free GLP-1 weight loss calculator to estimate potential outcomes at different doses, and our BMI calculator to track your baseline and progress.
- 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 official Mounjaro discount codes or promotional offers in the UK?
No official discount codes exist for Mounjaro in the UK through legitimate channels. The prescription price is fixed by the pharmacy or NHS provision. Be cautious of websites claiming to offer coupons — verify any such offers through your prescriber or the MHRA medicines verification system.
Is Mounjaro free on the NHS?
Yes, Mounjaro is free on the NHS if prescribed through a specialist weight management service. However, availability is limited and varies by region. Waiting lists can be long. Ask your GP about referral to your local tier 3 service to check eligibility and availability in your area.
How much does Mounjaro cost privately in the UK?
Private Mounjaro costs range from approximately £130–£320 per month depending on your dose. Each KwikPen provides 4 weeks of doses. Prices vary between providers, so compare options. Higher maintenance doses (10–15 mg) cost more than starting doses (2.5–5 mg).
What is the difference between Mounjaro and Wegovy pricing in the UK?
Both Mounjaro and Wegovy are similar in cost when prescribed privately (£130–£320/month), but Mounjaro is a dual GIP+GLP-1 agonist while Wegovy is GLP-1 only. Clinical trials suggest Mounjaro may achieve slightly higher average weight loss, though individual results vary. NHS availability differs by region for each medication.
Can I use health insurance to reduce the cost of Mounjaro?
Most standard UK health insurance policies do not cover prescription weight loss medications like Mounjaro. Check your specific policy, but typically these are classed as lifestyle medications rather than essential treatment. Some private prescribing services may offer payment plans — enquire when getting your clinical assessment.
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.