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 5mg Price Increase in the UK
Mounjaro (tirzepatide) costs have increased across the UK in recent months. Whether you're accessing this prescription-only weight management injection through the NHS or privately, understanding current pricing and your options is essential. This guide explains the cost landscape, why prices are changing, and how to access Mounjaro 5mg affordably. Try our free GLP-1 weight loss calculator to explore potential outcomes at different doses before committing to treatment.
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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.
UK Mounjaro 5mg Pricing and Cost Context
Private prescription costs for Mounjaro 5mg have risen across most UK online prescription services, reflecting global supply chain pressures and increased demand. Current private prescription costs for a single 5mg KwikPen typically range from £120 to £200 depending on the provider, with prices varying month to month.
- Monthly subscription models often cost £150–£180 for ongoing 5mg supply
- One-off prescriptions may cost slightly more per pen than subscription plans
- Prices have increased by 15–25% since 2024 in many cases
- Different providers charge different amounts — shopping around can save £30–£50 per month
The 5mg dose is typically the first maintenance dose after the initial 2.5mg titration phase. Price increases reflect rising manufacturing costs, pharmaceutical supply chain disruptions, and high demand for GLP-1 and tirzepatide medications globally. Your prescriber will assess whether 5mg is the appropriate dose for your individual circumstances, or whether escalation or adjustment is needed as part of your personalised dosing schedule.
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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 — Cost and Timeline
NHS access is free at point of use but requires referral to a specialist tier 3 weight management service. Waiting times vary significantly by region (integrated care board) — many areas have waiting lists of 6–24 months. Private access is available immediately through a UK-licensed online prescriber following a clinical assessment; you pay per prescription or via subscription.
An online consultation typically costs £15–£50, with prescription charges on top. Most UK adults find private Mounjaro more accessible if they cannot wait for NHS services. Use our BMI calculator to check your eligibility threshold — adults with a BMI of 30 or above, or 27–29.9 with weight-related health conditions, may qualify for either route.
NHS access is free at point of use but requires referral to a specialist tier 3 weight management service. Waiting times vary significantly by region (integrated care board) — many areas have waiting lists of 6–24 months. Private access is available immediately through a UK-licensed online prescriber following a clinical assessment; you pay per prescription or via subscription. An online consultation typically costs £15–£50, with prescription charges on top. Most UK adults find private Mounjaro more accessible if they cannot wait for NHS services. Use our BMI calculator to check your eligibility threshold — adults with a BMI of 30 or above, or 27–29.9 with weight-related health conditions, may qualify for either route.
- 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.
Why has Mounjaro 5mg become more expensive in the UK?
Price increases reflect global supply chain pressures, rising manufacturing costs, and unprecedented demand for tirzepatide and other GLP-1 medications. Pharmaceutical production capacity has not kept pace with demand, pushing prices upward across most private prescription services in the UK and internationally.
How much does Mounjaro 5mg cost privately in the UK right now?
Private Mounjaro 5mg costs typically range from £120–£200 per KwikPen as of 2025. Subscription models usually cost £150–£180 monthly. Prices vary between providers, so comparing options can save you money. Always check current pricing directly with a registered service.
Is Mounjaro cheaper on the NHS than privately?
Yes — Mounjaro is free on the NHS. However, NHS access requires a referral to specialist weight management services and often involves long waiting lists (6–24 months depending on your region). Private access is faster but you pay the full cost.
Can I switch from private to NHS Mounjaro to save money?
Yes, you can ask your GP for an NHS referral to specialist weight management services. However, you may need to pause private treatment during the NHS assessment process, and waiting lists can be lengthy. Discuss timing with your prescriber.
Does the 5mg price increase apply to other Mounjaro doses?
Yes — price increases affect all doses of tirzepatide (Mounjaro). Starting doses (2.5mg) and higher maintenance doses (7.5mg, 10mg, 15mg) have all increased. Escalation costs more as you progress through the dosing schedule.
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.