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 7.5mg Cost and Access in the UK
Mounjaro 7.5mg is the third escalation dose of tirzepatide, a GLP-1 receptor agonist and GIP receptor agonist weight loss injection available in the UK. The cost of Mounjaro varies significantly depending on whether you access it privately or through the NHS, and pricing differs between providers. This guide explains how much Mounjaro 7.5mg costs, where to get it, and what the process involves to help you understand your options.
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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.
What Does Mounjaro 7.5mg Cost in the UK?
Mounjaro 7.5mg costs vary across private providers offering UK prescriptions. Private cost typically ranges from £150 to £250 per injection depending on the provider and whether you're paying per dose or as part of a monthly plan. A single Mounjaro KwikPen contains four weekly doses, meaning a month's supply costs roughly £600 to £1,000 privately. Some online prescribing services offer subscription pricing models that may reduce the per-dose cost if you commit to multiple months. NHS access to tirzepatide is free at the point of use but involves significant waiting lists in many regions. Eligibility for both routes requires BMI of 30 or above, or 27+ with weight-related health conditions such as type 2 diabetes or high blood pressure. Use our free BMI calculator to check if you may qualify, and our GLP-1 weight loss calculator to estimate potential results at the 7.5mg dose.
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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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NHS vs Private Access: Which Route Is Right for You?
NHS route: Free but limited availability. You need a GP referral to a tier 3 specialist weight management service. Waiting lists vary by region—some areas have waits of 18 months or more. Once accepted, Mounjaro is provided at no cost. Private route: Available immediately through GPhC-registered online clinics. A licensed prescriber assesses your suitability via an online consultation (usually £30–£50). If approved, your prescription is dispensed by a regulated pharmacy. You pay for each injection. Private access is faster but requires paying for treatment. Both routes require an assessment confirming you meet eligibility criteria and that tirzepatide is clinically appropriate for you.
- 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.
Is there a cheaper way to access Mounjaro 7.5mg in the UK?
The most cost-effective route is NHS access if you can access it, as it's free on prescription. However, waiting lists can be very long (months to years in some areas). Private online prescribing is faster but involves paying per dose. Some private providers offer discounted rates for longer commitments. Always ensure any provider is GPhC-registered and prescriber is UK-licensed.
How long do I stay on Mounjaro 7.5mg before increasing to 10mg?
NHS guidance recommends staying on each dose for a minimum of four weeks before increasing. Your prescriber will assess your response and any side effects before moving to the next dose. Some people stay longer on 7.5mg if they're getting good results or experiencing significant nausea. It's individualised based on how your body responds.
Can I get Mounjaro 7.5mg privately without NHS waiting lists?
Yes. Private online clinics can typically assess and prescribe within days rather than months. You'll need to pay for each dose (roughly £150–£250 per injection), and the full treatment cost falls to you. Check the provider is GPhC-registered and the prescriber is UK-licensed before starting.
What's the difference between Mounjaro and Wegovy at similar doses?
Mounjaro (tirzepatide) is a dual GIP and GLP-1 receptor agonist, while Wegovy (semaglutide) is GLP-1 only. Mounjaro 7.5mg and Wegovy 1.7mg are approximate equivalents based on clinical outcomes, though individual results vary. Both require prescriptions and similar eligibility criteria. Your prescriber can advise which is more suitable for your situation.
Do I need ongoing consultations to stay on Mounjaro 7.5mg?
Yes. Prescribers typically require follow-up assessments to monitor weight loss, side effects, and your suitability to continue. On the NHS, this is via specialist services. Privately, most online clinics require periodic check-ins (every 4–12 weeks) before renewing prescriptions. These ensure treatment remains safe and effective for you.
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