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 the third escalation dose in the tirzepatide weight loss treatment programme. The cost and availability of this dose varies significantly depending on whether you access it through the NHS or a private prescription. This guide explains what the 7.5mg dose is, how much it typically costs in the UK, and how to access it following a clinical assessment.
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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.
Mounjaro 7.5mg Dose Schedule and Cost in the UK
Mounjaro 7.5mg is the third dose in the tirzepatide titration schedule, typically reached in weeks 9–12 of treatment. Each Mounjaro KwikPen contains four weekly doses (one month supply) and costs vary by provider:
- Private cost: approximately £150–£200 per month for the 7.5mg dose, depending on the provider and whether you're starting or maintaining this strength
- NHS cost: free if prescribed through specialist tier 3 weight management services, though NHS access is limited and varies significantly by region (ICB)
The 7.5mg dose represents a mid-range strength. It sits between the 5mg dose (typically the first maintenance dose) and the maximum 15mg dose. Clinical trials showed that participants on 10mg and 15mg doses achieved greater average weight loss than those on lower doses, though results vary significantly between individuals. Your prescriber will assess whether escalation to 7.5mg or beyond is appropriate for you based on your tolerance and individual response.
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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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How to Access Mounjaro 7.5mg in the UK
Private route: Access Mounjaro 7.5mg through a GPhC-registered online pharmacy following an online clinical assessment with a UK-licensed prescriber. This is the most accessible route for most people in the UK and does not require a GP referral. You'll be assessed for eligibility, which typically requires a BMI of 30 or above, or 27–29.9 with weight-related health conditions such as type 2 diabetes, high blood pressure, or cardiovascular disease. Our free BMI calculator can help you determine your current BMI instantly.
NHS route: Available through specialist tier 3 weight management services following GP referral, but access is extremely limited in most areas and waiting times can be lengthy. Mounjaro has been approved by NICE (National Institute for Health and Care Excellence) for NHS use, but regional availability remains patchy.
Whichever route you choose, a prescriber will review your medical history and check for contraindications before issuing a prescription. Mounjaro is prescription-only and requires a clinical assessment.
Once you begin Mounjaro treatment, you'll typically start at 2.5mg and increase gradually. The standard titration takes you through 5mg (weeks 5–8), then 7.5mg (weeks 9–12), then potentially 10mg, 12.5mg, and the maximum 15mg dose. You must spend at least 4 weeks on each dose before escalating. Use our free GLP-1 weight loss calculator to estimate potential weight loss outcomes at different doses — individual results vary, but the calculator helps visualise the tirzepatide dose pathway. Track your progress and weight loss journey using our free progress tracker throughout your treatment.
- 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?
Yes, Mounjaro has been approved by NICE for NHS use within specialist tier 3 weight management services. However, NHS availability is limited and varies significantly by region. Access typically requires a GP referral and can involve waiting lists. Private prescription routes are more immediately accessible for most people in the UK.
How much does Mounjaro 7.5mg cost privately in the UK?
Private cost is typically £150–£200 per month for the 7.5mg dose, depending on the provider and whether you're escalating from a lower dose or maintaining this strength. Prices vary between GPhC-registered online pharmacies. Always check the current pricing with your chosen provider.
When do you reach the 7.5mg dose of Mounjaro?
You typically reach Mounjaro 7.5mg in weeks 9–12 of treatment, assuming you've tolerated lower doses (2.5mg for weeks 1–4, then 5mg for weeks 5–8). Your prescriber may adjust this timeline based on your response and any side effects.
What is the difference between Mounjaro 7.5mg and Wegovy doses?
Mounjaro is a dual GIP and GLP-1 agonist; Wegovy is a GLP-1 agonist only. They have different dose ranges. Mounjaro reaches up to 15mg per week; Wegovy reaches 2.4mg per week. They are not directly equivalent — these are separate medications with distinct mechanisms and dosing schedules.
Will I need to stay on Mounjaro 7.5mg permanently?
Mounjaro treatment duration varies by individual. Some people continue maintenance at a particular dose for extended periods; others escalate further. Your prescriber will discuss the duration and approach based on your health goals and response. Stopping Mounjaro typically results in weight regain over time.
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.