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 5mg Price in the UK — What You Need to Know
Mounjaro (tirzepatide) 5mg is the standard maintenance dose for weight management in the UK, but pricing varies significantly depending on whether you access it through the NHS or private prescribing. There's no single "cheapest price" — costs depend on your route to prescription, your region, and your prescriber. This guide explains UK pricing, NHS eligibility, and how to understand what you might pay.
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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 Much Does Mounjaro 5mg Cost in the UK?
Private prescribing costs: Mounjaro 5mg typically costs between £129 and £180 per month through UK private online prescribers, depending on the provider and whether you need an initial consultation fee. Each KwikPen contains four weekly injections, so this is roughly a four-week supply. Prices vary because different GPhC-registered pharmacies set their own fees.
- Initial consultation with a UK-licensed prescriber: often £15–£45 (sometimes waived if purchasing)
- Monthly supply (4 pens × 5mg): approximately £129–£180
- Annual cost if consistent: roughly £1,500–£2,200
NHS costs: If prescribed through the NHS, you pay standard prescription charges (£9.65 per item in England as of 2024), regardless of the drug's actual cost to the NHS. However, NHS access to Mounjaro remains limited and varies by region.
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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.
NHS Access vs Private Cost — Which Route for You?
NHS prescribing is significantly cheaper per dose if you can access it, but availability is the main barrier. Mounjaro is approved by NICE for NHS specialist weight management services (tier 3), but you need a referral from your GP and there are often long waiting lists — sometimes 6–18 months depending on your region. Private prescribing offers faster access with no waiting list, but costs substantially more over time. Use our free GLP-1 weight loss calculator to estimate potential outcomes at the 5mg dose, then discuss the best access route with your GP or a licensed prescriber. The "cheapest" option depends on your circumstances: if you can access NHS services, that's significantly cheaper; if speed matters, private may be worth the cost.
- 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 Mounjaro 5mg available on the NHS in the UK?
Yes, Mounjaro is approved by NICE for NHS specialist weight management services (tier 3). However, access is limited and varies by region. You need a GP referral and acceptance into a specialist tier 3 service. Waiting times can be several months to over a year depending on your area. If approved, you pay only standard prescription charges (£9.65 per item in England).
Why does Mounjaro 5mg cost different amounts at different private providers?
Different GPhC-registered pharmacies set their own pricing based on their operating costs, consultation fees, and supply chain costs. Some include the prescriber consultation in the price, others charge separately. Shopping around is worthwhile — prices genuinely vary between £129–£180 monthly for the same dose.
What's included in the £129–£180 monthly cost for private Mounjaro?
This typically covers the KwikPen supply (4 weeks of injections) and may include a consultation with a UK-licensed prescriber. Initial consultations are sometimes extra (£15–£45). Some providers include follow-up support; others charge separately. Always check what's included before purchasing.
Is there a cheaper alternative to Mounjaro 5mg for weight loss in the UK?
Wegovy (semaglutide) and Saxenda (liraglutide) are other UK-licensed weight loss injections. Pricing varies — Wegovy at equivalent doses may cost similarly or less, depending on the provider. NHS access is equally limited for all three. Discuss options with your prescriber, as medication choice depends on your health profile, not just cost.
How can I access Mounjaro most affordably in the UK?
If you qualify, NHS access via tier 3 specialist services is significantly cheaper (prescription charges only), but waiting lists are long. For faster private access, compare prices across multiple GPhC-registered providers — prices vary considerably. Use our free BMI calculator to confirm your eligibility, then ask your GP about NHS referral timescales before committing to private prescription.
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.