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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Getting Mounjaro in Wales — Cost and Access Guide
Mounjaro (tirzepatide) is available in Wales through both NHS specialist services and private prescription routes, though access and costs differ significantly depending on which pathway you choose. This guide explains how to access Mounjaro in Wales, what it costs privately, and how NHS eligibility works. If you're considering weight loss treatment, understanding your options is essential before approaching your GP or a private prescriber.
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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.
Mounjaro Cost and Private Access in the UK
Private prescription costs for Mounjaro in the UK typically range from £150 to £350 per month, depending on your starting dose and the prescribing service you use. The 2.5 mg starter dose is usually at the lower end of this range, while higher maintenance doses (10 mg to 15 mg) cost more. Each KwikPen contains 4 doses (4 weeks' supply), so costs reflect the dose strength you're prescribed.
- Starter dose (2.5 mg): approximately £150–£180 per pen
- Maintenance doses (5–15 mg): approximately £200–£350 per pen
- Prescription fee: typically £9.90 in England (not applicable in Wales once prescribed)
Private access requires an online consultation with a UK-licensed prescriber. If clinically appropriate, they issue a prescription to a GPhC-registered pharmacy. This route bypasses NHS waiting lists entirely and is available to anyone meeting eligibility criteria without a GP referral.
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.
NHS Access to Mounjaro in Wales
In Wales, NHS access to Mounjaro is through specialist tier 3 weight management services, typically via All Wales Medicines Strategy Group (AWMSG) approval pathways. You must be referred by your GP, and eligibility assessment is stricter than private routes. Waiting times for NHS specialist services in Wales can be several months to over a year depending on your local health board.
Your GP can discuss whether referral is appropriate based on your BMI, health conditions, and previous weight loss attempts. Use our free BMI calculator above to check your starting point before speaking with your GP. Private prescription offers faster access if you're eligible and can afford the cost.
The online consultation process is straightforward: you complete a detailed health questionnaire, declare any medications and medical conditions, and a prescriber reviews your information. They assess whether tirzepatide is suitable based on your individual health profile. If approved, a prescription is issued to a GPhC-registered pharmacy within 24 hours, and your KwikPen is delivered discreetly. Our GLP-1 weight loss calculator can help you estimate potential results at different doses before you consult.
- 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.
What's the difference between NHS and private Mounjaro in Wales?
NHS access is free but requires GP referral to specialist services with long waiting times. Private prescription costs £150–£350 monthly but bypasses waiting lists. Both use identical tirzepatide medication; the difference is speed of access and cost responsibility.
Can I get Mounjaro on the NHS in Wales?
Yes, if referred to a specialist weight management service and meeting AWMSG eligibility criteria. Typically BMI 30+ or BMI 27+ with weight-related health conditions. Discuss eligibility with your GP, who can refer you to your local health board's tier 3 service.
How much does a Mounjaro KwikPen cost privately?
A 4-week supply (one KwikPen with 4 doses) costs roughly £150–£350 depending on dose strength. Starter doses cost less than maintenance doses. Costs vary slightly between prescribing services.
How long does it take to get Mounjaro privately?
Online consultation to delivery typically takes 3–5 working days. You complete a health questionnaire, a prescriber reviews it, and if approved, the pharmacy dispenses and sends your KwikPen. Much faster than NHS routes which can take months.
Is Mounjaro the same as Wegovy?
No. Mounjaro (tirzepatide) is a dual GIP and GLP-1 agonist, while Wegovy (semaglutide) is GLP-1 only. Mounjaro typically shows higher average weight loss in clinical trials. Both require prescription and clinical assessment before use.
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.