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 10mg in the UK: What You Need to Know
Mounjaro 10mg is a mid-level maintenance dose of tirzepatide, a prescription-only weight loss injection licensed for UK adults. At 10mg, clinical trials showed average weight loss of around 19.5% of body weight when combined with diet and exercise changes. This dose is typically reached after several weeks of dose titration starting from 2.5mg. Whether you're accessing Mounjaro through NHS specialist services or private prescription, understanding how the 10mg dose works can help you make informed decisions about your weight management options.
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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.
How Mounjaro 10mg Works
Mounjaro contains tirzepatide, a dual GIP and GLP-1 receptor agonist — this dual mechanism is what distinguishes it from single-mechanism alternatives like Wegovy (semaglutide). At the 10mg dose, tirzepatide activates two natural hormone pathways in your body. The GIP pathway helps regulate fat storage and utilisation, whilst the GLP-1 pathway reduces appetite, increases feelings of fullness, and slows gastric emptying. Together, these effects may help reduce food cravings and support eating smaller portions. The 10mg mounjaro kwikpen represents an escalation from lower doses, meaning your body has had time to adjust to the medication. Clinical trials showed that at 10mg, weight loss averages around 19–20% of body weight, though individual results vary significantly. This dose is not the maximum — some patients continue titrating to 12.5mg or the maximum 15mg depending on response and tolerability.
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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.
10mg Mounjaro: Eligibility and UK Access
In the UK, you must meet specific criteria to access Mounjaro at any dose, including 10mg. You're eligible if you have a BMI of 30 or above, or a BMI of 27–29.9 with at least one weight-related health condition such as type 2 diabetes, prediabetes, high blood pressure, or cardiovascular disease. For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, lower thresholds apply. Mounjaro requires a prescription and clinical assessment. Access through NHS specialist tier 3 weight management services varies by region; waiting lists can be lengthy in many areas. Alternatively, private UK-licensed prescribers can issue prescriptions following an online assessment. Check your eligibility using our free BMI calculator above, and discuss options with your GP or a licensed prescriber to determine if the 10mg mounjaro uk prescription pathway is 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 Mounjaro 10mg the maximum dose in the UK?
No. The 10mg dose is a mid-level maintenance dose. Mounjaro escalates to 12.5mg and then 15mg (the maximum). Your prescriber decides if escalation is appropriate based on your response, tolerability, and health goals. You must spend at least 4 weeks at each dose before increasing.
How long does it take to reach the 10mg dose?
You start at 2.5mg and increase by 2.5mg every 4 weeks: 2.5mg (weeks 1–4), 5mg (weeks 5–8), 7.5mg (weeks 9–12), then 10mg (weeks 13–16). This means reaching 10mg typically takes about 4 months. Individual timelines may vary based on tolerability.
What weight loss can I expect at 10mg Mounjaro?
Clinical trials showed average weight loss of approximately 19.5% of body weight at the 10mg dose over 72 weeks, alongside reduced-calorie diet and exercise. Individual results vary widely — some people lose more, some less. Our GLP-1 weight loss calculator can help estimate potential outcomes.
Are there more side effects at the 10mg dose?
Side effects are generally dose-related. At 10mg, common side effects include nausea, diarrhoea, constipation, and stomach pain — typically mild to moderate and often reduce over time. Serious side effects are rare. Always report new or worsening symptoms to your prescriber immediately.
Can I get Mounjaro 10mg through the NHS?
Yes, but availability is limited and varies by region. NHS access is through specialist tier 3 weight management services, usually requiring a GP referral. Waiting lists can be months to years. Private prescription is an alternative route available without NHS referral through registered UK prescribers.
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.