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 Pricing in the UK
There are no official discount codes for Mounjaro in the UK, but understanding your treatment options can help you access this weight management medication affordably. Whether you're eligible for NHS coverage through specialist tier 3 services or considering private prescription routes, knowing the real costs involved is essential. This guide covers pricing, eligibility, and how to get Mounjaro in the UK through both pathways.
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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.
NHS Mounjaro Access and Costs
NHS eligibility for Mounjaro (tirzepatide): NICE has approved tirzepatide for use within NHS specialist weight management services, meaning there is no direct cost to eligible patients. However, NHS access is strictly through tier 3 or tier 4 specialist services — not standard GP prescription.
- You must be referred by your GP to a specialist weight management service in your area
- Eligibility requires a BMI of 30 kg/m² or above, or BMI 27–29.9 with weight-related health conditions (type 2 diabetes, hypertension, sleep apnoea, or cardiovascular disease)
- For South Asian, Chinese, Black African, or Black Caribbean adults, lower BMI thresholds may apply
- NHS waiting lists vary significantly by region — some areas have waits of 6–18+ months
If you are eligible, NHS provision means no prescription cost, though regional availability remains inconsistent.
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 Prescriptions and Costs in the UK
Private prescription route: Mounjaro is available through UK-licensed online prescribing services following a clinical assessment. Private costs typically range from £129–£320 per month depending on the dose and provider, with the 15 mg dose (maximum) being the most expensive.
- You do not require an NHS referral for private prescriptions
- Assessment is completed online with a UK-licensed prescriber
- Prescriptions are dispensed by GPhC-registered pharmacies
- Some private providers offer payment plans or bulk-purchase discounts, though no formal promotional codes exist
Private access allows you to start treatment immediately rather than waiting for NHS services. Use our free GLP-1 weight loss calculator to project potential results at different Mounjaro doses before committing.
- 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 there an official Mounjaro discount code in the UK?
No official discount codes exist for Mounjaro in the UK. The manufacturer, Eli Lilly, does not offer publicly available promotional codes. However, private prescription providers may offer payment plans, bulk-dose discounts, or loyalty schemes — it's worth asking when you receive your assessment.
How much does Mounjaro cost on the NHS?
Mounjaro is free on the NHS for eligible patients through specialist tier 3 weight management services. There is no direct prescription cost, though you may incur travel or consultation costs. NHS access requires a GP referral and can involve significant waiting times depending on your region.
What's the typical private cost of Mounjaro in the UK?
Private Mounjaro costs range from approximately £129–£320 per month depending on the dose prescribed. Starting doses (2.5 mg) are cheaper; the maximum dose (15 mg) is the most expensive. Some providers offer payment plans to spread the cost over several months.
Can I get a cheaper price by switching to Wegovy instead?
Wegovy (semaglutide) and Mounjaro (tirzepatide) have similar private pricing structures, typically £129–£300 per month. Wegovy is a GLP-1 agonist only, while Mounjaro is a dual GIP/GLP-1 agonist — choice depends on clinical assessment and individual suitability, not cost. Your prescriber will advise which is appropriate for you.
What should I do if I can't afford private Mounjaro?
If private costs are unaffordable, ask your GP about referral to NHS specialist weight management services, though waits can be lengthy. Alternatively, explore whether your employer's health insurance covers weight management medications. Some patients discuss payment plans directly with private prescription providers during their consultation.
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.