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 Is Mounjaro 7.5mg in the UK?
Mounjaro 7.5mg is a mid-range dose of tirzepatide used during the weight management escalation phase in the UK. The cost varies significantly depending on whether you access it through the NHS or privately. At this dose, Mounjaro is typically prescribed after 8–12 weeks on lower doses (2.5mg or 5mg), representing an important escalation point in treatment. This guide explains UK pricing, NHS availability, and how the 7.5mg dose fits into your weight loss 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.
Understanding Mounjaro 7.5mg Dosing & UK Costs
Mounjaro 7.5mg is administered as a once-weekly injection using a pre-filled KwikPen device. In the standard UK dose escalation schedule, you remain on each dose for a minimum of 4 weeks before increasing, meaning you'd typically reach 7.5mg around weeks 9–12 of treatment. Private costs for Mounjaro 7.5mg generally range from £130–£250 per month, depending on your provider and whether additional consultation fees apply. Each KwikPen contains 4 weekly doses (one month's supply). NHS access to Mounjaro, including the 7.5mg dose, is available through specialist tier 3 weight management services following referral from your GP, though regional availability and waiting times vary significantly across UK integrated care boards. Some areas have better access than others, and you may be on a waiting list for several months.
- Once-weekly injection at 7.5mg dose
- Minimum 4 weeks between dose increases
- Private pricing: approximately £130–£250/month
- NHS access through specialist services only
- Part of standard tirzepatide escalation protocol
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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 for Mounjaro in the UK
The NHS has approved tirzepatide (Mounjaro) for weight management through NICE guidance, but access is restricted to specialist tier 3 services — your GP cannot prescribe it directly. If you pursue the NHS route, you'll be referred by your GP for specialist assessment, and costs are covered by the NHS if approved. Private access is faster: you can access Mounjaro through a GPhC-registered online pharmacy following an online clinical assessment with a UK-licensed prescriber, typically within days. Private costs are transparent and consistent across doses. Our GLP-1 weight loss calculator can help you explore potential weight loss outcomes at the 7.5mg dose alongside lifestyle changes. Whether NHS or private, you'll need to demonstrate you meet eligibility criteria: BMI ≥30, or BMI 27–29.9 with weight-related health conditions such as 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.
Is Mounjaro 7.5mg available on the NHS in the UK?
Yes, Mounjaro (tirzepatide) is approved by NICE for weight management on the NHS. However, access is through specialist tier 3 weight management services only, not from your GP directly. You'll need a referral and may face significant waiting lists depending on your region.
How much does Mounjaro 7.5mg cost privately in the UK?
Private Mounjaro 7.5mg typically costs £130–£250 per month through GPhC-registered pharmacies. Costs may vary slightly by provider and whether consultation fees are included. Each KwikPen contains 4 weekly doses.
How long will I stay on the 7.5mg dose of Mounjaro?
You should remain on 7.5mg for at least 4 weeks before your prescriber considers increasing to the next dose (10mg). How long you stay on this dose depends on your individual response and your prescriber's recommendations.
What is tirzepatide and how does it differ from semaglutide?
Tirzepatide (Mounjaro) is a dual GIP and GLP-1 receptor agonist, while semaglutide (Wegovy) is a GLP-1 agonist only. Both are weight loss injections licensed in the UK, but tirzepatide uses two hormone pathways, which may provide different results in clinical trials.
Will I need to stay on Mounjaro 7.5mg long-term?
Weight loss treatment duration varies by individual. Some people stay on Mounjaro long-term to maintain weight loss, while others may reach a target weight and discuss stopping. Your prescriber will advise based on your progress, health conditions, and personal goals.
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.