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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How Much Do Mounjaro Clicks Cost in the UK?
Mounjaro clicks—the weekly injections of tirzepatide—are available in the UK through NHS specialist weight management services and private online prescribing routes. Costs and access options vary significantly depending on which route you choose. This guide explains UK pricing, eligibility criteria, and how to access Mounjaro, so you can understand your options before speaking to your GP or a licensed prescriber. We'll also help you compare this with other weight loss options available in the UK.
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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.
Mounjaro Cost in the UK: Private vs NHS Access
Private prescription costs for Mounjaro typically range from approximately £150 to £300 per month, depending on the dose you're prescribed. The KwikPen device contains 4 weekly injections, and costs scale with your dose titration stage. Starting doses (2.5 mg) are generally less expensive than maximum maintenance doses (15 mg). These private costs include the online consultation fee and pharmacy dispensing.
NHS access is available but involves referral to tier 3 or tier 4 specialist weight management services, and availability varies significantly by region. NHS waiting lists for specialist services can be lengthy—sometimes months or years depending on your local integrated care board. Once prescribed through the NHS, Mounjaro would be dispensed at standard NHS prescription costs (currently £9.90 per item in England if you pay, or free if exempt).
- Private costs reflect the full medicine price plus prescriber consultation
- NHS route requires specialist referral from your GP
- Mounjaro KwikPen contains 4 weekly doses
- Dose titration affects monthly cost—you may start at lower doses and escalate
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: Which Route Is Right for You?
The NHS route involves asking your GP for a referral to specialist weight management services. Your BMI, health conditions, and previous weight loss attempts will be assessed. If approved, you'll be prescribed Mounjaro through the specialist service—but waiting lists are substantial in many areas.
The private route allows you to access treatment faster without NHS referral. You complete an online health assessment with a UK-licensed prescriber, and if approved, a prescription is issued to a GPhC-registered pharmacy. The entire process typically takes 3–7 days. Our GLP-1 weight loss calculator can help you estimate potential outcomes at different doses, and our BMI calculator can confirm whether you meet eligibility thresholds—typically a BMI of 30 or above, or 27 or above with weight-related health conditions like type 2 diabetes or hypertension.
- 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 is a "Mounjaro click"?
A "Mounjaro click" refers to a single weekly injection of tirzepatide (the active ingredient in Mounjaro). Each KwikPen contains 4 clicks (4 weekly doses). The term comes from the clicking sound the pen makes when you administer the injection. One click delivers the prescribed dose.
How much does Mounjaro cost on the NHS?
Through the NHS, Mounjaro would typically be dispensed at the standard NHS prescription cost of £9.90 per item in England (or free if you're exempt). However, accessing it through the NHS requires referral to a specialist weight management service, and waiting times can be very long depending on your region.
Is private Mounjaro more expensive than Wegovy?
Mounjaro and Wegovy pricing are similar in the private market, typically ranging from £150–£300 per month depending on dose. Mounjaro is a dual GIP/GLP-1 agonist (generally reaching higher doses), while Wegovy is a GLP-1 agonist only. Exact costs vary by provider and dose prescribed. Your prescriber will discuss the most appropriate option for you.
How do I get Mounjaro through the NHS?
Ask your GP for a referral to tier 3 or tier 4 specialist weight management services in your area. You'll need a BMI of 30 or above (or 27+ with weight-related health conditions) and may need to show evidence of previous weight loss attempts. Once assessed and approved by the specialist service, Mounjaro can be prescribed and monitored.
Can I switch between private and NHS Mounjaro?
If you start on private treatment and later access NHS services, or vice versa, the transition should be managed by prescribers to ensure continuity of care. Inform both your private prescriber and NHS GP of any changes. Your dose may not change, but clinical monitoring will be coordinated through the NHS system.
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.