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
Free Discount Codes for Mounjaro in the UK
There are no official free discount codes for Mounjaro in the UK — tirzepatide is a prescription-only medicine available through NHS services or regulated private prescribers. However, several legitimate ways exist to access Mounjaro affordably, including NHS pathways and private pricing options that may offer better value. Understanding your eligibility and available routes is key to finding the most cost-effective option for your situation.
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 to Access Mounjaro Affordably in the UK
Mounjaro (tirzepatide) is available in the UK through two main routes, each with different cost structures. NHS access is available through specialist tier 3 weight management services for eligible adults — if prescribed on the NHS, you pay standard prescription charges (currently £9.90 per prescription, or free if exempt). However, NHS availability varies significantly by region and waiting lists can be lengthy.
Private prescribing is available through GPhC-registered online pharmacies following a clinical assessment. Private costs typically range from £129–£320 per month depending on your dose and provider. Some private providers offer:
- Subscription models with discounted rates for longer commitments
- Loyalty programmes for existing patients
- Bundled pricing for multiple-month supplies
- First-dose discounts for new customers
Always verify that any provider is GPhC-registered and offers proper clinical assessments before dispensing — genuine providers will not offer unrealistic discounts or skip clinical review.
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.
What to Avoid When Seeking Discounted Mounjaro
Be cautious of websites or sellers offering heavily discounted Mounjaro without requiring a prescription or clinical assessment — these are likely counterfeit or illegally sourced. Mounjaro must be prescribed by a UK-licensed prescriber and dispensed by a registered pharmacy. Never buy Mounjaro from unregulated sellers, international websites without UK verification, or anyone claiming to offer "free codes" or unrealistic discounts.
Counterfeit medications pose serious health risks. If you're struggling to afford Mounjaro privately, speak to your GP about NHS referral routes, even if waiting lists exist — this remains the safest option. You can also use our GLP-1 weight loss calculator to explore what results might be achievable, and discuss realistic timescales and costs with your prescriber.
- 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 for free in the UK?
Mounjaro is available free on the NHS if prescribed through a specialist weight management service and you're eligible. However, NHS availability varies by region and waiting lists can be months-long. Private prescribing typically costs £129–£320 per month depending on dose. There are no official free discount codes, but some private providers offer first-dose or loyalty discounts.
What is the cheapest way to get Mounjaro in the UK?
The cheapest option is NHS prescription if eligible — you'd pay the standard prescription charge (£9.90 or free if exempt). If using private prescribing, compare providers for the best rates, ask about multi-month discounts, and check subscription models. Always ensure the provider is GPhC-registered and conducts proper clinical assessments.
Are there legitimate discount schemes for Mounjaro?
Some regulated private pharmacies offer loyalty schemes, subscription discounts, or first-dose reductions. These are legitimate if offered by GPhC-registered providers who conduct proper clinical reviews. Beware of sellers claiming to offer unrealistic discounts or skipping clinical assessment — these are likely counterfeit suppliers and pose serious health risks.
Is Mounjaro the same as Ozempic, and do they have different costs?
Both contain semaglutide, but Mounjaro is tirzepatide — a different active ingredient. Ozempic is approved for type 2 diabetes (not weight loss in the UK). Mounjaro is the licensed weight management injection. Costs differ between providers and formulations, so compare both medication and provider pricing through legitimate GPhC-registered sources.
What should I do if I can't afford private Mounjaro?
Ask your GP for a referral to your local NHS tier 3 weight management service — this is the most affordable route if eligible. Discuss waiting times and alternative NHS weight management support. You can also explore other evidence-based methods like structured diets or exercise programmes while waiting, and use our BMI calculator and weight loss calculator to track progress.
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.