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
What Is Mounjaro 10mg?
Mounjaro 10mg is a mid-range dose of tirzepatide used in the UK weight management treatment pathway. It's the fourth escalation dose, typically reached around week 13–16 of treatment. At this dose, clinical evidence suggests participants may experience significant appetite suppression and potential weight loss. Like all Mounjaro doses, 10mg is a once-weekly injection administered using the pre-filled KwikPen device. Whether you're already taking Mounjaro or considering starting this medication, understanding how the 10mg dose works in your treatment journey is important for informed decision-making.
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.
How Mounjaro 10mg Works in Your Treatment Plan
Mounjaro 10mg sits in the middle of the dosing range (2.5mg to 15mg maximum). Most users reach this dose after spending at least 4 weeks on the 5mg starting dose and 7.5mg escalation dose. The dual GIP and GLP-1 receptor agonist mechanism remains the same across all doses—it's the strength of effect that increases. At 10mg, you may experience stronger appetite suppression compared to lower doses, potentially supporting greater food intake reduction.
The typical dosing schedule is: 2.5mg (weeks 1–4), 5mg (weeks 5–8), 7.5mg (weeks 9–12), then 10mg (weeks 13–16+). Your prescriber will assess your tolerance and results before each escalation. If side effects are manageable and weight loss is progressing, you may continue at 10mg or escalate further to 12.5mg or the maximum 15mg dose. This tiered approach allows your body to adjust gradually.
Use our GLP-1 weight loss calculator to see projected weight loss outcomes at different doses, including the 10mg level.
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.
Mounjaro 10mg: Expected Outcomes & Practical Information
Based on SURMOUNT clinical trial data, participants on tirzepatide showed average weight loss ranging from approximately 15% at lower doses to 20.9% at the maximum 15mg dose. The 10mg dose typically falls in the 17–19% range, though individual results vary significantly. Weight loss depends on diet, activity level, adherence, and personal metabolism—never assume a specific outcome.
Storage: Keep unopened Mounjaro 10mg pens refrigerated at 2–8°C. After first use, you can store at room temperature (below 30°C) for up to 30 days. Injection sites should be rotated weekly between stomach, upper thigh, and upper arm. Track your progress with our free progress tracker to monitor weight changes over time.
- 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.
When do you typically reach Mounjaro 10mg?
Most people reach 10mg around week 13–16 of treatment, after spending at least 4 weeks each on the 2.5mg, 5mg, and 7.5mg doses. Your prescriber may adjust this timeline based on your tolerance and weight loss progress.
Is Mounjaro 10mg the maximum dose?
No. Mounjaro's maximum dose is 15mg. The 10mg dose is a mid-range escalation. Your prescriber may recommend continuing at 10mg or escalating further depending on your response and side effects.
What side effects might you experience at Mounjaro 10mg?
Common side effects include nausea, diarrhoea, constipation, and stomach pain. These often reduce as your body adjusts. Serious side effects are rare but can include severe stomach pain (possible pancreatitis) or allergic reactions—seek immediate medical attention if these occur.
How much weight can you lose on Mounjaro 10mg?
Clinical trials showed average weight loss of around 17–19% body weight at this dose, but results vary widely. Your actual weight loss depends on diet, exercise, adherence, genetics, and individual metabolism. Always discuss realistic expectations with your prescriber.
Can you switch from Mounjaro 10mg to Wegovy?
Switching between medications requires prescriber guidance. While both are GLP-1/GIP-agonist medicines, they have different mechanisms and dosing. Any medication change must be managed by a licensed healthcare professional, not self-directed.
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.