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 Prices in the UK
Mounjaro (tirzepatide) is a prescription-only GLP-1 receptor agonist used alongside diet and exercise for weight management. Cost varies significantly depending on whether you access it through the NHS or via private prescription. This guide explains UK pricing, dose bundles, and how to understand what you'll pay for this once-weekly injection across the different dose tiers.
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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 Prescription Mounjaro Costs in the UK
Private prescription costs for Mounjaro in the UK typically range from £129 to £320 per month, depending on the dose and provider. Each KwikPen contains 4 weekly injections, so you receive a month's supply per pen. Lower starting doses (2.5 mg and 5 mg) are usually cheaper than higher maintenance doses (10 mg, 15 mg). Some providers offer bundle pricing when you commit to multiple months upfront, which can reduce the per-dose cost. Prices may also vary if you're combining Mounjaro with a consultation fee — some GPhC-registered online pharmacies include the prescriber assessment in the total cost, whilst others charge separately. It's worth comparing providers, as pricing and bundle options differ. Always check that any provider is registered with the General Pharmaceutical Council (GPhC) before ordering.
- Typical range: £129–£320 per month depending on dose
- Each KwikPen = 4 weekly injections (1 month supply)
- Starting doses (2.5–5 mg) usually cheaper than maintenance doses
- Bundle discounts available with multi-month purchases
- Consultation fees may be separate or included in total cost
Clinically BackedWeight Loss
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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: Mounjaro is approved by NICE for NHS use within specialist tier 3/4 weight management services, but availability is extremely limited and regional waiting lists can extend many months or years. You'll need a GP referral to a specialist service. Private route: You can access prescription Mounjaro through an online consultation with a UK-licensed prescriber without NHS referral. This is faster but requires upfront payment. Use our free GLP-1 weight loss calculator to explore projected weight loss at different doses, and our BMI calculator to check your current health baseline. The eligibility criteria are the same for both routes: BMI 30+, or BMI 27–29.9 with weight-related health conditions like type 2 diabetes or high blood pressure.
- 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's included in Mounjaro bundle pricing?
A bundle typically includes multiple KwikPens (usually 1–3 months' supply) ordered together. Each pen contains 4 weekly injections at a fixed dose. Bundling reduces the per-pen cost compared to buying a single month. Some providers also bundle the prescriber consultation fee into the total price.
Is Mounjaro available on the NHS?
Yes, NICE has approved tirzepatide for NHS specialist weight management services. However, NHS availability is very limited and varies by region. You need a GP referral to a tier 3 specialist service, and waiting lists are often several months. Private prescription is faster but requires payment.
Why does Mounjaro cost more at higher doses?
Higher doses (10 mg, 15 mg) are more concentrated and require more active ingredient per pen. Manufacturers and pharmacies price accordingly. Starting doses (2.5 mg, 5 mg) are cheaper because they contain less tirzepatide per injection.
How long does one KwikPen last?
One KwikPen contains 4 pre-filled doses and lasts exactly 4 weeks (one injection per week). You'll need a new pen every month, so annual costs multiply your monthly price by 12. This is why bundle pricing can offer savings.
What happens if I want to increase my Mounjaro dose?
Dose increases follow a set titration schedule — minimum 4 weeks at each dose before increasing. Moving from 5 mg to 10 mg means a new pen at a higher cost. Your prescriber manages this, and you'll need to budget for the new dose price when you step up. Your progress with our free tracker can help you discuss dose adjustment with your prescriber.
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.