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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5mg Mounjaro in the UK — Cost, Access & How to Get It
5mg is the first maintenance dose of Mounjaro (tirzepatide) and is typically reached after four weeks of titration from the starting 2.5mg dose. If you're considering this prescription-only weight management injection in the UK, you'll want to understand the cost, where to access it, and the difference between NHS and private routes. This guide covers everything you need to know about accessing Mounjaro at the 5mg dose level in the UK, including realistic costs and the clinical assessment process required before prescription.
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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.
Private Prescription Cost for 5mg Mounjaro in the UK
The cost of 5mg Mounjaro through private prescription in the UK varies depending on the provider and whether you're accessing it through an online prescribing service or a private clinic. A single Mounjaro KwikPen at 5mg (containing four weekly doses) typically costs between £129 and £180 when obtained via private prescription through a GPhC-registered online pharmacy. Monthly costs therefore range from approximately £129 to £180, depending on the provider and any additional consultation fees.
- Private online prescriptions usually include a clinical assessment consultation fee (typically £15–£50)
- Some providers bundle consultation with the medication cost; others charge separately
- Prices may vary based on demand, stock availability, and promotional offers
- Private prescriptions require assessment by a UK-licensed prescriber before the KwikPen is dispensed
Unlike some branded medications, Mounjaro costs are fairly consistent across private prescribing services in the UK, though you may find slight variations. Always check what is included in the quoted price — some services include the consultation, whilst others add it separately.
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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.
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NHS vs Private Access for Mounjaro — Key Differences
Accessing Mounjaro through the NHS involves referral to a tier 3 specialist weight management service, typically through your GP. However, NHS availability varies significantly by region, and waiting lists can be lengthy — often several months or longer depending on your area's Integrated Care Board (ICB) commissioning decisions. Private prescription access is faster and doesn't require NHS referral; you complete an online clinical assessment with a UK-licensed prescriber and receive your prescription within 24–48 hours in most cases.
- NHS route: Referral required, regional variation, potentially free but with waiting lists
- Private route: No referral needed, faster access (24–48 hours typical), costs £129–£180 per month
- Both require a clinical assessment to confirm eligibility and suitability
- Private prescriptions are dispensed by GPhC-registered pharmacies only
- 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 is included in the cost of 5mg Mounjaro on private prescription?
The cost typically includes the Mounjaro KwikPen (four weekly 5mg doses) and a clinical assessment consultation. Some providers bundle these together; others charge separately. The pen itself is the primary cost. Always confirm with your provider whether consultation fees are additional or included in the quoted price.
Can I get 5mg Mounjaro on the NHS instead of paying privately?
Yes, but you'll need referral to a tier 3 specialist weight management service through your GP. NHS access is free but availability varies by region, and waiting lists can be several months long. Private prescription is significantly faster if you prefer not to wait and can afford the cost.
How long does it take to access 5mg Mounjaro privately?
Most private online prescribing services complete the clinical assessment within 24 hours and dispatch the medication within 24–48 hours of prescription approval. You could receive your first KwikPen within 2–3 working days in many cases, much faster than NHS routes.
Is 5mg the starting dose of Mounjaro, or will I need to build up to it?
5mg is not the starting dose. Mounjaro begins at 2.5mg for the first four weeks, then increases to 5mg in week 5. You cannot skip directly to 5mg; dose titration is a requirement of safe prescribing. If you're returning to treatment, your prescriber will advise on dosing based on your history.
How can I check if I'm eligible for 5mg Mounjaro before paying for a private prescription?
Use our free BMI calculator above to check your personal BMI, and review the NHS eligibility criteria: adults with BMI 30+ or BMI 27–29.9 with weight-related health conditions may qualify. An online clinical assessment will confirm your individual eligibility, and the prescriber can advise whether Mounjaro is appropriate for you before you commit to cost. ```
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