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 7.5 mg Cost in the UK
The cost of Mounjaro 7.5 mg in the UK varies significantly depending on whether you access it through the NHS or privately. At this maintenance dose, a single KwikPen (four weekly injections) typically costs between £190–£250 through private UK pharmacies following clinical assessment. NHS prescriptions have a standard flat fee of £11.90 per item in England, though availability is limited and often requires referral to specialist tier 3 weight management services. This guide explains both routes, eligibility criteria, and what to expect at the 7.5 mg dose level during your tirzepatide treatment journey.
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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.
NHS Access vs Private Cost for Mounjaro 7.5 mg
Mounjaro 7.5 mg is a maintenance or escalation dose typically reached after 8–12 weeks of treatment, following dose titration from the starting 2.5 mg dose. Access to Mounjaro through the NHS is limited and follows a specific pathway: your GP must refer you to a tier 3 specialist weight management service within your local Integrated Care Board (ICB). These services conduct a comprehensive assessment before prescribing. Once prescribed through the NHS, you pay the standard prescription charge of £11.90 per item in England (free in Scotland, Wales, and Northern Ireland). However, NHS availability is highly variable — waiting lists can extend many months in some regions, and not all ICBs commission these services equally. Private access is faster: you complete an online clinical assessment with a UK-licensed prescriber, and if approved, your KwikPen is dispensed by a GPhC-registered pharmacy. Use our free GLP-1 weight loss calculator to understand projected weight loss at the 7.5 mg dose level alongside reduced-calorie diet and physical activity.
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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.
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Private Cost Breakdown and NHS Eligibility
Private Mounjaro 7.5 mg typically costs £190–£250 per KwikPen (four injections = one month's supply), making annual costs approximately £2,280–£3,000 depending on provider. For NHS eligibility at 7.5 mg, you must have a BMI of 30 or above, or 27–29.9 with a weight-related health condition such as type 2 diabetes, hypertension, or sleep apnoea. South Asian, Chinese, Black African, and Black Caribbean adults may qualify at slightly lower BMI thresholds. Clinical trials showed that at 7.5 mg, participants lost an average of 15–19% body weight — though individual results vary significantly and depend on lifestyle changes too. Neither NHS nor private access assures specific weight loss outcomes. Your prescriber will assess suitability based on your individual health profile, medications, and medical history.
- 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 a Mounjaro 7.5 mg KwikPen cost privately in the UK?
A single pre-filled KwikPen at 7.5 mg (containing four weekly injections) costs between £190–£250 through private UK pharmacies. Prices vary slightly by provider. Each KwikPen lasts four weeks, so monthly costs are approximately £190–£250. Annual costs at this dose typically range £2,280–£3,000 if continuing the same dose without further escalation.
Can I get Mounjaro 7.5 mg free on the NHS in the UK?
Yes, if prescribed through the NHS, you pay only the standard prescription charge (£11.90 per item in England; free in Scotland, Wales, Northern Ireland). However, NHS access is limited to specialist tier 3 weight management services. Your GP must refer you, and waiting lists can be several months in many areas. Not all regions offer equal access.
How long does it take to reach the 7.5 mg dose?
Mounjaro follows a strict dose titration schedule. You start at 2.5 mg for weeks 1–4, increase to 5 mg for weeks 5–8, then escalate to 7.5 mg for weeks 9–12. You must remain on each dose for at least four weeks before increasing. So reaching 7.5 mg typically takes 8–12 weeks from starting treatment.
Is the cost the same at every Mounjaro dose level?
No. Costs vary by dose because the pharmaceutical cost increases with higher tirzepatide concentrations. Lower doses (2.5 mg and 5 mg) are cheaper than 7.5 mg, 10 mg, or 15 mg. Private prices range from approximately £129–£320 per KwikPen depending on dose level. Always confirm your dose-specific cost with your chosen provider.
What's included in the Mounjaro 7.5 mg cost?
The price of a KwikPen includes the pre-filled injection pen with four doses of tirzepatide solution. It does not include clinical consultations (which may be charged separately in private services) or disposal of used pens. Some providers include pharmacist support; others charge separately. Check the terms before purchasing.
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