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 Prices and Cost in the UK
Mounjaro 5mg is the first maintenance dose in the Mounjaro titration schedule, typically used from weeks 5–8 as part of your treatment plan. If you're considering this GLP-1 and GIP receptor agonist for weight management in the UK, understanding the cost and how to access it is essential. Prices vary significantly depending on whether you access Mounjaro through the NHS or privately, and several factors affect both availability and cost. This guide explains what you can expect and how to explore your options.
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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 Costs in the UK
Private prescription costs for Mounjaro 5mg typically range from £120 to £180 per month, though prices vary between providers. This is the first escalation dose, and you'll usually remain on 5mg for a minimum of 4 weeks before your prescriber considers increasing to the next dose level. Each KwikPen contains 4 weekly injections (one month's supply).
The total cost of your treatment depends on several factors: which dose level you progress to, how long you remain on each dose, the provider you choose, and whether additional consultations are required. Private online consultations typically cost £40–£80 and must be completed before your first prescription is issued. Some providers bundle consultation fees into the overall cost, whilst others charge separately.
- Initial consultation: £40–£80 (may be included in package)
- 5mg prescription (4 weeks): £120–£180
- Follow-up consultations: often included in ongoing care
- Delivery: usually included or £5–£15 additional
Unlike 2.5mg (the starting dose), 5mg represents a commitment to continuing treatment, so providers may offer better pricing for patients committing to a longer course or regular repeat prescriptions.
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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
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NHS vs Private Access for Mounjaro
NHS access to tirzepatide (Mounjaro) is available through specialist tier 3/4 weight management services, but it is not available as a routine GP prescription. You must be referred by your GP to a specialist weight management service in your area. NICE has approved tirzepatide for NHS use, but regional availability and waiting lists vary significantly — some areas have waits of several months or longer.
The private route avoids NHS waiting lists entirely. You complete an online consultation with a UK-licensed prescriber, and if approved, your prescription is dispensed by a GPhC-registered pharmacy. This typically takes 3–7 days from consultation to first delivery. Private access is best for those who want faster access or who live in areas with limited NHS specialist services. Calculate your estimated weight loss at different doses using our free GLP-1 weight loss calculator to help decide if treatment is right for you.
- 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.
How much does Mounjaro 5mg cost privately in the UK?
Private Mounjaro 5mg typically costs £120–£180 per month for a 4-week supply (one KwikPen). Prices vary by provider. Add £40–£80 for your initial online consultation, though some providers include this in package pricing. Follow-up appointments are often included in ongoing care plans.
Is Mounjaro 5mg available on the NHS in the UK?
Yes, tirzepatide (Mounjaro) is approved by NICE for NHS use through specialist weight management services (tier 3/4). However, NHS availability varies by region, and waiting lists can be substantial. You must be referred by your GP. Private access offers faster availability without NHS referral requirements.
What affects the total cost of Mounjaro treatment?
Total cost depends on: which dose you progress to (5mg is the first maintenance dose), how long you stay on each dose before increasing, your chosen provider, whether consultations are bundled into the price, and delivery charges. Higher doses cost more, and longer treatment naturally costs more overall.
How long do I stay on the 5mg Mounjaro dose?
You typically remain on 5mg for a minimum of 4 weeks. Your prescriber will then assess your response and tolerability before considering escalation to 7.5mg. Some people remain on 5mg longer if they're achieving good results and tolerating it well — this is individualised.
Can I switch from NHS to private Mounjaro if waiting lists are too long?
Yes. If you're waiting for NHS access and want to start sooner, you can access private tirzepatide through an online consultation. Many people start privately and later transition to NHS if their region makes it available, though this requires discussion with your GP or prescriber.
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.