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 Bundle Price in the UK — Cost and Access
Mounjaro (tirzepatide) is a prescription-only weight management injection available in the UK through both NHS specialist services and private prescription routes. The cost varies significantly depending on which route you choose, your starting dose, and which provider you use. Understanding your options helps you make an informed decision about whether Mounjaro is accessible and suitable for your situation. This guide explains UK pricing, what's included, and how to access it.
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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.
Private Mounjaro Costs in the UK
Private prescription Mounjaro pricing typically ranges from £129 to £320 per month depending on your dose and the provider. Most UK online pharmacies offer Mounjaro in starter packs or bundles that include the initial titration doses, which can provide better value than purchasing individual pens.
- Starter bundles usually include 2.5 mg and 5 mg doses (weeks 1–8) for approximately £250–£400
- Ongoing maintenance at higher doses (10 mg, 15 mg) typically costs £200–£320 per KwikPen
- Prices may vary between GPhC-registered pharmacies — comparison shopping is worthwhile
- Some providers offer subscription models with discounts for regular orders
- Each KwikPen contains 4 weekly injections, so one pen lasts exactly 4 weeks
Private access requires an online clinical assessment with a UK-licensed prescriber. If the prescriber approves your treatment, your prescription is dispensed by a pharmacy — you don't need an NHS referral.
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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 Prescription Route
NHS route: Free through the NHS if prescribed by a tier 3 specialist weight management service, but access varies by region and waiting lists can be substantial (often 6 months to 2+ years depending on your local Integrated Care Board). NICE has approved tirzepatide for use within NHS services, but this does not mean it is automatically available everywhere.
Private route: Faster access (often within days of assessment) but you pay the full cost upfront. You'll need to pass a clinical assessment confirming your BMI, health conditions, and suitability. Both routes require an ongoing prescription — Mounjaro is not a one-off purchase.
Try our free GLP-1 weight loss calculator to explore projected outcomes and understand whether Mounjaro might be suitable for your goals before committing to treatment.
- 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.
What does a Mounjaro bundle typically include?
A Mounjaro starter bundle usually includes your initial titration doses (typically 2.5 mg and 5 mg pens covering weeks 1–8). Each pen contains 4 weekly injections. Some bundles also include sharps bins and injection guidance, though these vary by provider. Always check what's included before purchasing.
Is Mounjaro covered by the NHS in the UK?
Yes, NICE has approved tirzepatide (Mounjaro) for NHS use within specialist tier 3 weight management services. However, availability varies significantly by region and your local Integrated Care Board. You'll typically need a GP referral and may face a waiting list. Check with your GP about NHS access in your area.
How long does one Mounjaro KwikPen last?
Each KwikPen contains exactly 4 weekly injections, meaning one pen lasts 4 weeks. During titration, you may use one dose per week (so one pen per week), but costs below reflect the standard 4-week supply per pen once you know which dose you're on.
Why do Mounjaro prices vary between private providers?
Prices differ because private providers set their own costs, have different sourcing arrangements, and offer varying service levels (e.g., follow-up consultations, delivery speed). It's worth comparing prices between GPhC-registered pharmacies, but always check if your chosen provider is registered with the General Pharmaceutical Council.
What happens after I've finished my initial Mounjaro bundle?
After your starter bundle, you'll need to continue purchasing individual pens at your maintenance dose (usually 10 mg or 15 mg weekly). You'll need an ongoing prescription from your prescriber, which is typically renewed at each refill. Many providers offer subscription discounts for repeat orders.
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.