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 Price in the UK — What You Need to Know
If you're considering Mounjaro (tirzepatide) for weight management in the UK, understanding the cost and how to access it is essential. The 5mg dose is typically the first maintenance step after the starting 2.5mg dose. In the UK, you can access Mounjaro through the NHS specialist weight management services or privately through online consultations with UK-licensed prescribers. Costs vary significantly depending on your route and provider. This guide explains UK pricing, eligibility, and how the access process works so you can make an informed decision.
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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 Mounjaro 5mg Cost in the UK
Private prescription costs for 5mg Mounjaro in the UK typically range from £129 to £180 per month, though this varies by provider and whether you're starting treatment or already established on the medication. The 5mg dose comes in a pre-filled KwikPen containing four weekly injections — essentially one month's supply. Many UK-registered online prescribing services offer this dose once you've completed an initial consultation and clinical assessment. The cost usually covers the prescription assessment, the medication itself, and delivery. It's important to note that private costs may increase at higher doses (7.5mg, 10mg, 12.5mg, 15mg), so budget accordingly if your prescriber recommends escalating treatment. Always confirm the exact price with your chosen provider before proceeding, as costs can vary. Some providers offer subscription models or discounts for committing to multiple months of treatment. Compare several UK-registered GPhC pharmacies to find the option that works best for your budget.
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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 for Mounjaro in the UK
NHS route: Mounjaro is available through NHS tier 3 specialist weight management services if you meet eligibility criteria (BMI 30+, or 27+ with weight-related health conditions). However, NHS availability varies significantly by region, and waiting lists can stretch from months to years in many areas. You'll need a GP referral to access NHS specialist services. Private route: Private prescribing offers faster access without NHS waiting lists. You complete an online health questionnaire and consultation with a UK-licensed prescriber, who assesses whether tirzepatide is suitable for you. If approved, a prescription is issued to a GPhC-registered pharmacy for dispensing and delivery. Our GLP-1 weight loss calculator can help you understand potential outcomes with this medication, while the BMI calculator lets you check your current BMI to assess eligibility.
- 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 available on the NHS for weight management in the UK?
Yes, Mounjaro (tirzepatide) is approved for NHS use through specialist tier 3 weight management services. However, access depends on your BMI and weight-related health conditions, and availability varies by region. You'll need a GP referral, and waiting times can be very long in many areas. Private access is typically faster.
What does a 5mg Mounjaro KwikPen cost privately in the UK?
Private 5mg Mounjaro typically costs between £129–£180 per month through UK online prescribing services. Costs vary by provider and whether you're new to treatment or already established. Always confirm the exact price with your chosen GPhC-registered pharmacy before ordering.
How do I get a Mounjaro prescription privately in the UK?
Complete an online health assessment with a UK-licensed prescriber through a private prescribing service. If approved, you'll receive a prescription dispensed by a GPhC-registered pharmacy with delivery to your home. The process usually takes 24–48 hours from approval to dispatch.
Is the 5mg dose the starting dose for Mounjaro?
No. The standard starting dose is 2.5mg for the first four weeks. After four weeks, if tolerated well, most people move to 5mg as the first maintenance dose. Your prescriber will decide if escalation is appropriate based on your progress and side effects.
Are there cheaper alternatives to Mounjaro for weight management in the UK?
Wegovy (semaglutide) is another GLP-1 injection licensed for weight management with similar pricing. Liraglutide (Saxenda) is also available but requires daily injections rather than weekly. Costs are comparable, typically £120–£200 monthly. Your prescriber will advise which is most suitable for you.
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.