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 in the UK: Cost and How to Access It
Mounjaro 7.5 mg is a prescription-only weight loss injection licensed in the UK that may help support weight management when combined with diet and exercise. This dose represents the escalation phase of tirzepatide treatment, typically reached after 8–12 weeks of gradual dose increases. Access in the UK is available through two routes: NHS specialist weight management services or private online prescription. The cost and availability differ significantly depending on which route you choose. Understanding both options helps you make an informed decision about accessing this medication.
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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 Access and UK Cost Context for Mounjaro 7.5 mg
Private prescription route: In the UK, Mounjaro 7.5 mg obtained through a private online prescription typically costs between £180–£280 per month, depending on the provider and whether you're continuing treatment or starting for the first time. This price usually includes the clinical consultation with a UK-licensed prescriber, the prescription itself, and dispensing through a GPhC-registered pharmacy. Each KwikPen contains four weekly doses, so a single pen lasts approximately one month. Some providers offer package deals for multiple months, which may reduce the per-dose cost. Private access does not require an NHS referral and allows you to start treatment more quickly than NHS routes in many cases. Important: prices vary between providers and should be confirmed directly with the service before starting treatment.
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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 vs Private Access: Which Route Is Right for You?
NHS access: Mounjaro is available through NHS specialist tier 3 weight management services, typically following NICE approval. However, access varies significantly by region, and waiting lists can be lengthy in many areas—sometimes 6–18 months or longer. Your GP can refer you to your local specialist weight management service if you meet eligibility criteria (BMI ≥30, or BMI ≥27 with weight-related health conditions). Once approved, NHS treatment is free at the point of use. Private access: Requires an online consultation with a UK-licensed prescriber who assesses your suitability. If approved, a prescription is issued and dispensed by a pharmacy. This route is faster but involves private cost. Most people weigh NHS waiting times against private cost when deciding. Use our GLP-1 weight loss calculator to estimate potential weight loss at this dose to help inform your decision.
- 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 7.5 mg cost on the NHS in the UK?
Mounjaro on the NHS is free at the point of use once prescribed through a specialist weight management service. However, access is limited by availability and regional variation. Waiting lists can be several months to over a year. Your GP can refer you to your local tier 3 service if you meet eligibility criteria (BMI ≥30, or ≥27 with comorbidities).
Can I buy Mounjaro 7.5 mg online in the UK?
Yes, through private online prescription services. A UK-licensed prescriber conducts an online consultation, and if approved, your prescription is dispensed by a GPhC-registered pharmacy. This typically costs £180–£280 per month. No NHS referral is needed, and treatment can begin within days rather than months.
Is Mounjaro 7.5 mg the same as tirzepatide, and does the name affect cost?
Yes, Mounjaro is the brand name for tirzepatide. The dose—whether 7.5 mg, 10 mg, or 15 mg—does affect cost. Higher doses typically cost more. Tirzepatide 7.5 mg falls in the mid-range pricing. Your prescriber will determine which dose is appropriate for you based on your response to treatment.
How long does a Mounjaro KwikPen last, and is it included in the cost?
One KwikPen contains four weekly doses and lasts one month. The cost quoted by private providers includes the pen itself. When you receive your prescription, you'll get enough pens to cover your treatment period. Storage requires refrigeration until first use, then up to 30 days at room temperature.
What's the difference between accessing Mounjaro privately vs waiting for NHS treatment?
Private access costs £180–£280/month but starts within days after a successful online consultation. NHS access is free but involves waiting lists of months to years depending on your region. Both require clinical assessment and prescription. Your choice depends on your budget, urgency, and local NHS availability.
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.