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 — UK NHS Prescribing Information
Mounjaro 7.5mg is an escalation dose of tirzepatide used in the UK for weight management, typically reached after 9–12 weeks of treatment. This dose is part of the titration schedule and falls within NHS NICE-approved prescribing guidance for eligible adults. Understanding where 7.5mg fits in your treatment pathway, NHS access routes, and what to expect at this dose can help you make informed decisions about weight management with your healthcare provider.
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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 Eligibility and Mounjaro 7.5mg Access in the UK
Mounjaro (tirzepatide) is NICE-approved in the UK for weight management through NHS tier 3 specialist weight management services. To be eligible for NHS prescription at any dose, including 7.5mg, you must meet one of the following criteria: a BMI of 30 kg/m² or above, or a BMI of 27–29.9 kg/m² with at least one weight-related health condition such as type 2 diabetes, hypertension, or cardiovascular disease.
For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, lower thresholds apply — you may be eligible with a BMI of 27.5 or above. Access to the 7.5mg dose itself depends on your response to lower doses and your prescriber's assessment. The 7.5mg dose is typically reached after a minimum of 9 weeks on lower doses, following the established titration pathway. NHS prescribing is managed through specialist tier 3 services, and availability varies significantly by region.
- Tier 3 services assess your suitability for Mounjaro at each dose escalation
- Regional variation means waiting times and access differ across NHS ICBs
- Private prescribing offers faster access without NHS referral
- Your GP can refer you to tier 3 services, though many areas have extended waiting lists
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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.
Mounjaro 7.5mg Dose Context and NHS vs Private Routes
At 7.5mg, you are at the midpoint of the Mounjaro dosing range (which extends to 15mg maximum). Clinical data from the SURMOUNT trial showed weight loss increases progressively across doses, though individual results vary significantly. The mounjaro kwikpen format makes self-injection straightforward once-weekly.
NHS access requires specialist referral and is free at point of use, but waiting lists can span months or longer in many areas. Private prescribing routes offer faster access — you can obtain a prescription from a UK-licensed prescriber following an online clinical assessment through a GPhC-registered pharmacy. Both routes require a valid prescription and ongoing clinical monitoring. Use our free GLP-1 weight loss calculator to explore projected results at different doses, and our BMI calculator to track your starting point and progress.
- 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 does Mounjaro 7.5mg fit into the NHS prescribing pathway?
Mounjaro 7.5mg is an escalation dose within the NICE-approved NHS pathway. You start at 2.5mg, progress through 5mg, and reach 7.5mg after a minimum of 9 weeks if your prescriber assesses it as appropriate. The dose is increased to optimise weight loss response while managing side effects. Your prescriber reviews your progress at each stage before escalating.
Can I access Mounjaro 7.5mg through the NHS or do I need to pay privately?
Both routes are available in the UK. NHS access is through tier 3 specialist weight management services following a GP referral — it's free but waiting lists are often lengthy (sometimes 6+ months depending on your region). Private access is faster; you can consult a UK-licensed prescriber online and obtain a prescription without an NHS referral, though you pay for the medication.
What's the difference between Mounjaro 7.5mg and Wegovy at equivalent doses?
Mounjaro is a dual GIP and GLP-1 receptor agonist, while Wegovy (semaglutide) is GLP-1 only. This dual mechanism may produce slightly different weight loss profiles. Mounjaro 7.5mg is roughly equivalent to Wegovy 1.7mg in terms of dose progression, though individual responses vary. Both are available in the UK through NHS specialist services or private prescribing.
What side effects should I expect at the 7.5mg dose?
Common side effects at 7.5mg include nausea, diarrhoea, vomiting, and stomach pain — similar to lower doses but sometimes more pronounced as you escalate. Most people experience fewer side effects after 4–8 weeks. Serious side effects are rare but can include severe stomach pain (possible pancreatitis) or gallbladder problems. Always inform your prescriber of any concerning symptoms.
How much weight loss can I expect at Mounjaro 7.5mg?
Clinical trials showed average weight loss increases across doses, though results vary significantly by individual. At 7.5mg, many people experience meaningful weight loss when combined with dietary changes and physical activity, but specific outcomes depend on your starting point, adherence, and individual metabolism. Your prescriber can discuss realistic expectations based on your circumstances.
Ready to take control of your weight loss journey?
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