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
Monjaro Discount and Cost Options in the UK
Monjaro (tirzepatide) is a prescription-only, once-weekly weight loss injection licensed in the UK, but it's not cheap. If you're considering this GLP-1 receptor agonist or GIP receptor agonist medication, understanding the true cost and potential savings is essential. This guide explains Monjaro pricing, discount options, and how to access it affordably through NHS or private routes 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 Much Does Monjaro Cost in the UK?
Private prescription costs for Monjaro typically range from £129 to £320 per month depending on the dose you're prescribed. A standard weekly weight loss injection at the maximum 15mg dose usually costs around £300–£320 monthly through private online prescribing services. Each KwikPen contains four weekly doses (one month's supply).
- Starting doses (2.5–5mg): Usually £129–£170 per month
- Maintenance doses (10–15mg): Usually £250–£320 per month
- NHS access: Free on prescription through NHS specialist tier 3/4 weight management services, but availability varies significantly by region and waiting times can be lengthy
Costs can vary between providers, and some online clinics offer package deals or loyalty discounts on repeat prescriptions. Always check that any provider is GPhC-registered before ordering.
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.
Money-Saving Tips and Discount Options
Several legitimate ways may help reduce your Monjaro costs. Many private prescribing services offer discounts for annual upfront payment rather than monthly—this can save 10–20%. Some providers have loyalty schemes for returning customers or bulk purchasing discounts if you're committing to a longer treatment period. Always ask about available discounts when requesting a quote.
NHS access remains free but requires a referral to specialist services and can involve significant waiting times. If you're eligible and can wait, NHS prescription is the most cost-effective route. Use our free BMI calculator to check if you meet initial eligibility criteria, then speak to your GP about referral options.
Understanding What You're Paying For- 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.
Why is Monjaro so expensive compared to other weight loss injections?
Monjaro is newer than some alternatives and uses a dual GIP and GLP-1 receptor agonist mechanism, which involves more complex drug development. Patent protection and manufacturing costs affect pricing. Wegovy (semaglutide), another weekly weight loss injection, has similar private pricing in the UK. Competition may eventually reduce costs, but currently both are expensive.
Are there genuine Monjaro discount codes or vouchers available in the UK?
Eli Lilly (the manufacturer) occasionally runs patient support programmes, but these are typically for specific patient groups, not general discounts. Be cautious of unverified discount codes online—always purchase through legitimate GPhC-registered pharmacies following a UK prescriber's prescription. Never buy Monjaro without a valid prescription.
Can I get Monjaro on the NHS for free?
Yes, Monjaro is available on NHS prescription through specialist weight management services (tier 3/4), but access varies by region. You'll need a GP referral and may face waiting lists. NHS provision is completely free once approved, making it the most cost-effective option if you're eligible and can wait for an appointment.
What's included in the Monjaro price I see advertised?
Private prices typically include the prescription from a licensed UK prescriber and the medication itself from a GPhC-registered pharmacy. Some providers include follow-up consultations or dose adjustments in the quoted price. Always clarify exactly what's included before paying—ask about consultations, repeat prescription arrangements, and any additional fees.
Is it worth paying for Monjaro privately if I could get it on the NHS eventually?
This depends on your circumstances. Private access means immediate treatment without waiting lists, which some find valuable. However, if you can wait several months, NHS prescription provides free medication long-term. Use our GLP-1 weight loss calculator to estimate potential outcomes, then decide if the private cost justifies quicker access versus waiting for NHS availability.
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.