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
Free tracker included with every download this week
Mounjaro 10mg in the UK — What You Need to Know
The 10mg dose of Mounjaro (tirzepatide) represents a mid-to-higher escalation point in UK weight loss treatment, typically reached around weeks 13–16 of therapy. This guide explains how the 10mg dose fits into the UK prescribing pathway, NHS access through specialist tier 3 weight management services, NICE guidance, and what clinical evidence shows about weight loss at this dose. Whether you're considering this treatment or are already at this stage, understanding the NHS context and eligibility criteria will help you make informed decisions with your healthcare team.
10,000+ calculations today · NHS-aligned thresholds · 100% free
Calculate Your BMI Instantly
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 Mounjaro Access and the 10mg Dose in UK Treatment Pathways
In the UK, Mounjaro is accessed through two routes: the NHS specialist weight management pathway (tier 3 services) or private prescription through a GPhC-registered pharmacy following an online clinical assessment. At the 10mg dose, patients are typically well into their dose escalation schedule, having started at 2.5mg and progressed through 5mg and 7.5mg stages.
NICE approval and NHS eligibility: NICE has approved tirzepatide (Mounjaro) for use within NHS specialist weight management services for adults with 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. South Asian, Chinese, Black African, and Black Caribbean adults may be eligible at lower BMI thresholds (27.5 or above) due to higher cardiovascular risk at these levels.
NHS access typically involves a GP referral to your local tier 3 weight management service, followed by assessment and prescription by a specialist team. Waiting times vary significantly by region and ICB (integrated care board) — some areas have multi-month waiting lists. The 10mg dose represents continued escalation within the NHS dose pathway as tolerated and clinically appropriate.
Clinically BackedWeight Loss
No appointments. No waiting rooms. Just care — from a UK-regulated online pharmacy.
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.
Weight Loss Evidence at 10mg and NHS Prescribing Context
Clinical trial data (SURMOUNT-1) showed that patients on the 10mg dose achieved an average weight loss of approximately 19.5% of body weight over 72 weeks, alongside a reduced-calorie diet and increased physical activity. Individual results vary significantly — some patients see greater loss, others more modest. At 10mg, most patients have completed dose escalation and are on a stable maintenance dose.
Private route context: If accessing Mounjaro privately, you can request progression to 10mg at any point during your treatment, though prescribers typically recommend staying at each dose for at least 4 weeks before increasing. Private costs vary by provider and dose, but a 10mg KwikPen (4-week supply) typically costs £170–£200. Use our free GLP-1 weight loss calculator to project potential weight loss at different doses.
- 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 long does it take to reach the 10mg dose of Mounjaro?
Starting at 2.5mg, increasing by 2.5mg every 4 weeks (minimum), you would typically reach 10mg around weeks 13–16 of treatment. This assumes no dose holds or extensions. Your prescriber may adjust this timeline based on your tolerance and side effects. Always follow your prescriber's specific guidance.
Is Mounjaro 10mg available on the NHS in the UK?
Yes, tirzepatide (Mounjaro) is NICE-approved for NHS specialist weight management services in tier 3. Access is through referral from your GP to your local weight management service. Availability and waiting times vary by region. Private prescription is also available without NHS referral through registered UK prescribers.
What is the difference between the 10mg dose and higher doses of Mounjaro?
At 10mg, you're at a mid-to-higher dose with strong clinical efficacy. Higher doses (12.5mg and 15mg) may offer marginal additional benefit but also increase side effect risk. Most patients achieve substantial weight loss by 10mg. Your prescriber will assess whether escalation beyond 10mg is appropriate for your individual response.
Can I switch from Wegovy to Mounjaro at the 10mg equivalent dose?
Wegovy's maximum dose is 2.4mg weekly (approximate equivalent to Mounjaro 10mg based on clinical practice). A switch between medications should only be made under prescriber guidance — there is no official established conversion chart. Your prescriber will assess the best approach for your individual circumstances.
What should I expect at the 10mg dose in terms of side effects?
By 10mg, many patients report side effects (nausea, diarrhoea, appetite suppression) have stabilised compared to the dose escalation phase. However, GI side effects remain common. Serious side effects are rare but include severe stomach pain (possible pancreatitis) or gallbladder issues. Report any concerning symptoms to your prescriber immediately.
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.