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 and ADHD: What You Need to Know
Mounjaro (tirzepatide) is not approved or recommended for treating ADHD in the UK or anywhere else. Mounjaro is a prescription-only weight management injection licensed specifically for adults with excess weight. If you're searching for ADHD treatment options, your GP can discuss evidence-based approaches. If you're exploring weight management options alongside ADHD care, this guide explains how to access Mounjaro and other weight loss support in the UK.
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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.
What Mounjaro Is Actually Used For in the UK
Mounjaro (tirzepatide) is approved in the UK for weight management only, not for ADHD or any neurological condition. It is a dual GIP and GLP-1 receptor agonist — a medication that works on appetite regulation and metabolic pathways in the gut and brain.
Mounjaro is prescribed to UK adults who have a BMI of 30 or above, or BMI 27–29.9 with weight-related health conditions such as type 2 diabetes, high blood pressure, or sleep apnoea. ADHD is not a weight-related condition and does not influence Mounjaro eligibility.
If you have ADHD and are concerned about weight management, these are separate healthcare issues. Your GP can refer you to appropriate ADHD support and separately assess whether weight loss treatment might be suitable. Use our free BMI calculator to check your current BMI and understand whether you might meet eligibility criteria for weight management support.
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.
How to Access Weight Management Support in the UK
If you're looking for weight management options, the UK offers both NHS and private routes. NHS access typically involves referral to a tier 3 specialist weight management service through your GP — availability varies significantly by region and waiting lists can be lengthy. Private access involves an online consultation with a UK-licensed prescriber, who will assess whether Mounjaro or another GLP-1 medication (like Wegovy or Saxenda) is suitable for you. Our GLP-1 weight loss calculator can help you understand potential outcomes at different doses. Both routes require a clinical assessment — your prescriber will confirm you meet eligibility criteria and that the medication is safe for you personally.
If you have ADHD and are considering weight management medication, inform your prescriber about your ADHD diagnosis and any ADHD medications you take. Some interactions are possible, and your healthcare provider needs the full picture. ADHD itself does not change Mounjaro eligibility, but individual health factors do. Costs for private Mounjaro range from approximately £129–£320 per month depending on the dose you're titrated to. The Mounjaro KwikPen comes as a once-weekly injection. Always discuss any questions about interactions, side effects, or suitability with your prescriber or GP.
- 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 used to treat ADHD?
No. Mounjaro (tirzepatide) is not approved or used to treat ADHD in the UK or internationally. It is approved only for weight management in adults with excess weight. ADHD is a UK pharmacy with different medications like methylphenidate or atomoxetine, prescribed by specialist ADHD services.
Can I take Mounjaro if I have ADHD?
If you meet weight management criteria (BMI ≥30 or ≥27 with health conditions), Mounjaro may be prescribed separately from ADHD treatment. You must inform your prescriber about your ADHD and any ADHD medications you take, as potential interactions need to be assessed.
How much does Mounjaro cost privately in the UK?
Private Mounjaro costs approximately £129–£320 per month depending on your dose. Starting dose is 2.5 mg; maximum is 15 mg. Each KwikPen contains 4 weeks of once-weekly injections. Prices vary slightly between providers.
What's the difference between NHS and private access to Mounjaro in the UK?
NHS access requires GP referral to specialist tier 3 services and can involve long waiting lists, but is free. Private access is faster (online consultation within days), costs £129–£320/month, and doesn't require NHS referral, but remains prescription-only.
Will my ADHD medication interact with Mounjaro?
Some interactions are possible. Always tell your prescriber about ADHD medications you take before starting Mounjaro. Common ADHD medications like methylphenidate are generally compatible, but individual assessment is essential. Your prescriber will advise based on your specific situation.
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.