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
Mounjaro Discount Codes and UK Pricing
If you're searching for Mounjaro discount codes in the UK, it's important to understand how this prescription medication is actually accessed and priced. Mounjaro (tirzepatide) is available through the NHS and private prescribing routes, but discount codes don't typically apply in the traditional sense. This guide explains NHS eligibility, private costs, and what to expect when accessing this weight management injection in the UK.
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.
How Mounjaro Is Accessed in the UK
Mounjaro is a prescription-only medicine in the UK, meaning it cannot be purchased without a clinical assessment from a licensed prescriber. Access routes differ significantly:
- NHS access: Through tier 3 specialist weight management services following GP referral. NICE has approved tirzepatide for NHS use, but availability varies by region and ICB (Integrated Care Board). Waiting lists can be lengthy in many areas.
- Private access: Through GPhC-registered online pharmacies following an online clinical consultation. No NHS referral required, but you pay the full cost of the medication.
Unlike over-the-counter health products, Mounjaro cannot be discounted or have promotional codes applied in the traditional sense because each prescription is clinically individualised. A prescriber assesses your BMI, health conditions, and suitability before issuing a prescription.
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 Costs and What Affects Pricing
Private Mounjaro pricing varies by dose and provider, typically ranging from £129 to £320+ per month depending on which dose you're prescribed (2.5 mg through to 15 mg). Each KwikPen contains four weeks' worth of injections. Costs may appear higher or lower between providers, but this usually reflects different dose levels rather than true discounts.
Some private providers offer loyalty programmes, referral bonuses, or multi-month payment plans that reduce per-dose costs. Always check what's included in the quoted price and whether follow-up consultations are free. Calculate your personal BMI using our free BMI calculator to understand your eligibility and expected dose range.
- 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 genuine Mounjaro discount codes available in the UK?
No legitimate discount codes exist for prescription Mounjaro in the UK. Pricing is set by providers and based on the dose prescribed following clinical assessment. Be cautious of websites claiming to offer "discount codes" — these are typically scams. Always purchase only from verified GPhC-registered pharmacies.
Why is NHS Mounjaro free but private costs so much?
NHS prescriptions are funded by the health service once approved by your tier 3 specialist team. Private costs reflect the full price of the medication plus prescriber consultation fees. NHS access is free but involves referral, assessment, and often lengthy waiting lists.
Can I get cheaper tirzepatide elsewhere?
Tirzepatide is only available as the brand Mounjaro in the UK. Generic versions do not exist yet. Only purchase from UK-licensed prescribers and GPhC-registered pharmacies. Unlicensed sellers online pose serious health and safety risks.
Do multi-month prescriptions offer better value?
Some private providers offer discounts when you commit to paying for multiple months upfront. This is the closest to a "discount" you'll find — typically 5–10% savings on bulk purchases. Always read the terms carefully and ensure the provider is GPhC-registered.
What's the difference between Mounjaro and Wegovy pricing in the UK?
Both are once-weekly injectable GLP-1 medications available privately at similar price points (£129–£320+/month). Mounjaro is a dual GIP/GLP-1 agonist, while Wegovy is a GLP-1 agonist only. Pricing depends on the specific dose your prescriber recommends, not the medication type.
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.