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 on NHS Wales: Access, Cost and How to Apply
Accessing Mounjaro through NHS Wales is possible but involves navigating specialist weight management services with varying availability across health boards. This guide explains how NHS Wales funds tirzepatide (Mounjaro's active ingredient), what eligibility criteria you'll need to meet, current waiting times, and how private prescription routes offer an alternative if NHS access is limited in your area. We'll also help you understand what costs you might face and how to start the process through your GP.
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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 Access to Mounjaro in Wales: Current Availability and Eligibility
NICE approval and NHS Wales status: Tirzepatide (Mounjaro) was approved by NICE in 2023 for use within NHS specialist weight management services. NHS Wales health boards can fund tirzepatide, but availability varies significantly by region. Some health boards actively offer it; others have limited access or longer waiting lists. There is no single Wales-wide policy—each health board decides its own implementation.
Eligibility for NHS Mounjaro in Wales: You may be eligible if you have a BMI of 30 or above, or 27 to 29.9 with weight-related health conditions (type 2 diabetes, hypertension, sleep apnoea, cardiovascular disease). For South Asian, Chinese, Black African, or Black Caribbean adults, lower thresholds may apply (BMI 27.5+). You must be referred to a specialist tier 3 or tier 4 weight management service by your GP—it is not available through standard primary care.
- Check your BMI using our free BMI calculator above to see where you fall in the eligibility range
- Request a referral from your GP to your local health board's specialist weight management service
- Expect assessment by a multidisciplinary team (doctors, dietitians, psychologists)
- Waiting times vary: some areas offer appointments within weeks; others may have waiting lists of several months
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.
Private Mounjaro Prescription vs NHS Routes in Wales
NHS waiting times: Tier 3 specialist weight management services in Wales often have significant waiting lists. Some health boards report waits of 6–12 months or longer, especially in busy areas. If you're waiting for NHS assessment, you have the option to pursue private prescription in the meantime.
Private prescription costs: Through private online prescribing services, Mounjaro costs approximately £129–£320 per month depending on your dose. A full titration course (from 2.5 mg to your target dose) takes 16–20 weeks and may cost £600–£1,200 total. Individual doses: 2.5 mg (~£129), 5 mg (~£149), 7.5 mg (~£169), 10 mg (~£189), 12.5 mg (~£219), 15 mg (~£249–£320). Prices vary between providers.
Private prescriptions require an online clinical assessment with a UK-licensed prescriber, then dispensing by a GPhC-registered pharmacy. Use our GLP-1 weight loss calculator to explore potential weight loss outcomes at different doses, and compare against NHS eligibility to plan your next steps.
- 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.
Can I get Mounjaro free on NHS Wales?
Yes, NICE has approved tirzepatide for NHS use in specialist weight management services. However, availability varies by health board and waiting lists can be long. You must be referred by your GP to a tier 3 or tier 4 service. Check with your local health board directly about current access.
How long does it take to get Mounjaro on the NHS in Wales?
Waiting times vary significantly. Some health boards offer appointments within 2–4 weeks of referral; others have waiting lists of 6–12 months or longer. Contact your GP or local specialist weight management service to ask about current waiting times in your area.
What if I can't wait for NHS Mounjaro in Wales?
You can pursue private prescription through a UK-licensed online prescriber. This typically costs £129–£320 per month depending on your dose. Private prescriptions are processed faster (usually within days), but you pay out-of-pocket unless your health insurance covers weight management medication.
What's the difference between Mounjaro and Wegovy for NHS Wales access?
Both are GLP-1 weight loss injections approved by NICE. Mounjaro (tirzepatide) is a dual GIP/GLP-1 agonist; Wegovy (semaglutide) is a GLP-1 agonist only. Both are available through NHS specialist services. Mounjaro may offer slightly higher average weight loss in clinical trials, but NHS availability and waiting times vary by health board for both medications.
Do I need to meet a BMI requirement to access Mounjaro on NHS Wales?
Yes. You typically need a BMI of 30 or above, or 27 to 29.9 with weight-related health conditions (diabetes, hypertension, sleep apnoea, heart disease). For South Asian, Chinese, or Black African/Caribbean adults, lower thresholds apply (27.5+). Use our BMI calculator to check where you stand, then discuss eligibility with your GP.
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.