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 Golden Dose Syringe — UK Costs and Access
The "golden dose" of Mounjaro (tirzepatide) typically refers to the 10mg maintenance dose, where many people see optimal weight loss results. In the UK, access to Mounjaro depends on whether you pursue NHS or private routes, with significant differences in cost and waiting times. This guide covers UK pricing, eligibility, and how to access this prescription-only weight management injection through both pathways. Use our free BMI calculator to check your eligibility, and our GLP-1 weight loss calculator to estimate potential results at different doses.
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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 UK Pricing and Private Access Costs
Private prescription costs for Mounjaro in the UK vary by dose and provider. At the 10mg dose—often considered the golden dose for sustained weight loss—private prescriptions typically range from £180 to £250 per month, depending on the online clinic or pharmacy. The 15mg maximum dose generally costs £200 to £300 per month. These prices include the clinical assessment, prescription, and delivery of the KwikPen device. Starting doses (2.5mg) cost less, around £130 to £180, reflecting the lower medication content. It's important to note that dose titration means you'll progress through lower doses first—typically spending 4 weeks on each dose before increasing. Most private providers offer subscription or pay-per-dose options, so you can budget accordingly. Costs may vary slightly between GPhC-registered online clinics, so comparing options is worthwhile. Unlike Wegovy, which also requires prescription and clinical assessment, tirzepatide pricing structures can differ by provider.
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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.
Free Weight Loss Tools & Guides
Everything you need to understand your weight, explore medication options, and track your progress — completely free.
NHS vs Private Access — Routes to Getting Mounjaro
NHS route: Mounjaro is available through NHS specialist weight management services (tier 3/4), but access is highly dependent on your local integrated care board (ICB). Waiting lists can be several months to over a year in many regions. You'll need a GP referral to a specialist service, which assesses your BMI (usually 30+, or 27+ with weight-related health conditions), medical history, and suitability. NICE has approved tirzepatide, but regional availability remains inconsistent.
Private route: You can access Mounjaro through a UK-licensed prescriber via online consultation without NHS referral. The process typically takes 24–48 hours: complete a health questionnaire, have a video or phone consultation, receive a prescription if approved, and have your KwikPen delivered. This route is faster but requires out-of-pocket payment. Both routes require proper clinical assessment—never purchase without a valid UK prescription.
- 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 does "golden dose" of Mounjaro mean?
The golden dose typically refers to the 10mg weekly dose, where many people experience optimal weight loss results without excessive side effects. It's not an official medical term—individual golden doses vary. Some people see better results at 7.5mg or 15mg depending on their response and tolerability. Your prescriber will help determine your personal optimal dose through the titration process.
Can I get Mounjaro on the NHS in the UK?
Yes, Mounjaro (tirzepatide) is NICE-approved for NHS use through specialist weight management services. However, availability varies significantly by region and ICB. You'll need a GP referral to a tier 3 or 4 specialist service. NHS routes typically involve longer waiting times compared to private access, but there's no ongoing medication cost once approved.
How much does a month's supply of Mounjaro cost privately?
At the 10mg dose, expect £180–£250 per month privately in the UK. Lower doses (2.5–5mg) cost around £130–£180, and the maximum 15mg dose costs £200–£300. Prices include clinical assessment, prescription, and delivery of the KwikPen. Costs may vary slightly between GPhC-registered providers, so compare options for the best value.
What's the difference between Mounjaro and Wegovy in terms of access?
Both are prescription-only and available through NHS specialist services or private online prescribers. Mounjaro (tirzepatide) is a dual GIP/GLP-1 agonist; Wegovy (semaglutide) is a GLP-1 agonist only. Clinical trials showed similar average weight loss (~15%), though individual results vary. Private costs are comparable, typically £150–£300 per month depending on dose. Your prescriber will assess which is more suitable for you.
Do I need a GP appointment to get Mounjaro privately?
No. Private online prescribers conduct independent clinical assessments without requiring a GP referral. You'll complete a health questionnaire and have a consultation (video or phone) with a UK-licensed prescriber. If approved, you receive a prescription and your KwikPen is delivered. However, informing your GP that you're taking Mounjaro is advisable for continuity of care and medication interactions.
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.