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 Jab UK — Cost and Access Guide
Mounjaro (tirzepatide) is available in the UK through both NHS specialist services and private prescription routes, but costs, waiting times, and access pathways differ significantly. This guide explains how to get Mounjaro in the UK, what it costs, and what the online consultation process involves. Whether you're eligible for NHS access or considering private prescription, understanding your options helps you make an informed decision about this GLP-1 weight management injection.
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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.
Private Mounjaro Costs and Online Access in the UK
Private prescription costs for Mounjaro in the UK typically range from £129 to £320 per month depending on the dose (starting at 2.5 mg through to the maximum 15 mg dose). The KwikPen device contains 4 weekly injections, so costs reflect the dose you've been prescribed and titrated to by your healthcare provider.
To access Mounjaro privately, you complete an online clinical consultation with a UK-licensed prescriber through a GPhC-registered pharmacy. The consultation usually takes 10–15 minutes and covers your medical history, current medications, weight, height, and BMI. If the prescriber assesses that Mounjaro is clinically appropriate for you, a prescription is issued and dispensed by the pharmacy.
- Starting dose (2.5 mg): approximately £129–£180/month
- Maintenance doses (5–10 mg): approximately £180–£250/month
- Maximum dose (15 mg): approximately £280–£320/month
Costs vary between providers, and some pharmacies offer subscription discounts or bulk pricing for longer-term use. Many private providers also offer follow-up consultations (included or at additional cost) to monitor your progress and adjust doses safely.
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.
NHS vs Private Access: Which Route Is Right for You?
The NHS route is free but involves referral to a tier 3 specialist weight management service, potentially months-long waiting lists in many regions, and strict eligibility criteria. NHS access is through specialist clinics, not your standard GP surgery.
The private route is faster (often consultations available within days) and doesn't require NHS referral, but you pay for the medication yourself. Use our free GLP-1 weight loss calculator to estimate potential weight loss at different doses, and our free BMI calculator to confirm your eligibility before pursuing either pathway.
Online consultation process: Register with a UK pharmacy provider, book a consultation slot, complete health questionnaire, video or telephone assessment with a UK-licensed prescriber, prescription issued if suitable, medication delivered to your home. The whole process typically takes 48–72 hours from consultation to delivery.
- 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.
How much does Mounjaro cost privately in the UK per month?
Private Mounjaro costs typically range from £129–£320 per month depending on your dose. Starting doses (2.5 mg) cost around £129–£180/month, while the maximum 15 mg dose costs approximately £280–£320/month. Costs vary between providers and may include follow-up consultations. Always ask about additional fees before purchasing.
Can I get Mounjaro free on the NHS in the UK?
Yes, Mounjaro is available through NHS specialist tier 3 weight management services, but access requires GP referral and assessment by a specialist clinic. Availability varies significantly by region, and waiting lists can be months-long in many areas. You must meet specific BMI and health criteria to qualify for NHS prescription.
How long does the online consultation process take for private Mounjaro?
Online consultations typically take 10–15 minutes with a UK-licensed prescriber. The entire process from registration to prescription and delivery usually takes 48–72 hours. You'll complete a health questionnaire, have a brief video or telephone assessment, and receive your prescription and medication at home if clinically suitable.
What happens during a private Mounjaro consultation?
A UK-licensed prescriber will review your medical history, current medications, weight, height, and BMI. They'll discuss whether Mounjaro is appropriate for you based on NHS eligibility criteria (BMI 30+ or 27+ with weight-related health conditions). If suitable, a prescription is issued. Follow-up consultations monitor your progress and support safe dose titration.
Is private Mounjaro more expensive than NHS access?
Privately, you pay £129–£320/month depending on dose. NHS access is free but involves waiting lists and specialist referral. Private access is faster (days vs months) but requires upfront payment. Calculate your costs using our free BMI calculator to check NHS eligibility first, as NHS access would be cost-free if available in your region.
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.