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
Free tracker included with every download this week
Mounjaro Counting Clicks: Cost and Access in the UK
Mounjaro (tirzepatide) is a prescription-only weight management injection available in the UK through both NHS specialist services and private online prescribing. The term "counting clicks" refers to tracking each weekly dose in the KwikPen device. Understanding how to access Mounjaro and what costs are involved helps you make an informed decision about whether this treatment suits your health needs and budget. Access routes differ significantly between NHS and private options, each with distinct timelines and costs.
10,000+ calculations today · NHS-aligned thresholds · 100% free
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 Access and Cost in the UK
Private Mounjaro access in the UK is available through GPhC-registered online pharmacies following a clinical assessment with a UK-licensed prescriber. You do not need an NHS referral. Costs vary by dose and provider, typically ranging from £129 to £320 per month depending on which dose your prescriber recommends. Starting doses (2.5 mg) are usually at the lower end of this range, while maximum doses (15 mg) cost more. Each KwikPen contains four weekly doses (one month's supply). When comparing tirzepatide with alternative weight loss medications like semaglutide (Wegovy), costs may differ, so it's worth checking current pricing. Private prescribers will assess your eligibility based on your BMI and health conditions. Try our GLP-1 weight loss calculator to estimate potential weight loss outcomes and understand whether this treatment aligns with your goals.
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 Access vs Private Route
NHS access to Mounjaro is through tier 3 specialist weight management services, typically accessed via referral from your GP. However, availability varies significantly across different regions and integrated care boards (ICBs). Many areas have substantial waiting lists—sometimes months or even years—and some regions have limited or no access currently. NHS prescriptions are free once approved, but the lengthy wait and regional variation mean many UK adults choose private prescribing instead. The online consultation process for private access is straightforward: complete a health questionnaire, a prescriber reviews your medical history and BMI, and if suitable, a prescription is issued. Dispensing usually follows within 1–2 working days to a registered UK address.
- 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?
Private Mounjaro costs typically range from £129 to £320 per month depending on dose. Starting dose (2.5 mg) is usually cheaper; maximum dose (15 mg) is more expensive. Each KwikPen contains four weekly injections, so costs represent a month's supply. Prices vary between different online pharmacies, so it's worth comparing.
Can I get Mounjaro free on the NHS in the UK?
Yes, if prescribed through an NHS tier 3 specialist weight management service, Mounjaro is free. However, access varies by region and waiting lists can be very long. You'll need a GP referral. Many areas have limited availability. Your GP can advise whether your local ICB offers this treatment.
What happens during a private online Mounjaro consultation?
You complete a detailed health questionnaire, a UK-licensed prescriber reviews your medical history, weight, BMI, and health conditions. If eligible, they issue a prescription. The pharmacy dispenses and delivers within 1–2 working days. No face-to-face visit is needed, but the assessment is thorough.
Do I need to count clicks on my Mounjaro KwikPen?
The KwikPen automatically delivers the correct dose with an audible click. You'll hear four clicks per dose. Counting clicks helps confirm the injection was delivered fully. Each pen contains four doses (four weeks), then you dispose of it and start a new one.
Is Mounjaro cheaper than Wegovy on the NHS?
On the NHS, both are free once prescribed through specialist services. Privately, costs depend on dose and provider—tirzepatide (Mounjaro) and semaglutide (Wegovy) may have different pricing. Compare current private costs with both providers for accurate pricing before deciding.
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.