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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How Much Does Mounjaro 7.5mg Cost in the UK?
Mounjaro 7.5mg is the third dose in the tirzepatide dose titration schedule, typically used after 8–12 weeks of treatment. In the UK, the cost of Mounjaro 7.5mg depends on whether you access it through the NHS or privately. Private prescription costs range widely depending on the provider, while NHS access is available through specialist weight management services, though eligibility and waiting times vary significantly by region. This guide explains pricing, how to access Mounjaro in the UK, and what to expect at each step.
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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 7.5mg Cost in the UK
Private prescription cost for Mounjaro 7.5mg typically ranges from £129 to £250 per month depending on the provider and whether you're continuing an established prescription or starting new treatment. Each KwikPen contains 4 weekly doses, so monthly costs cover a full month's supply at this dose level.
- Costs vary between GPhC-registered online pharmacies offering Mounjaro prescriptions
- Initial consultation fees may apply (£20–£80 depending on the provider)
- Prescription repeat costs are usually lower than first prescriptions
- Total first-month cost including consultation can range from £150–£330
- Private prescribing is fastest — typically prescription issued within 24–48 hours of online consultation
Unlike pharmacy names (which MyWeightCheck does not endorse or list), reputable providers will be GPhC-registered and offer prescriptions from UK-licensed prescribers only. Price comparison between providers is straightforward — contact providers directly for current tariffs, as pricing changes regularly.
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No appointments. No waiting rooms. Just care — from a UK-regulated online pharmacy.
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 to Mounjaro in the UK
NHS access to Mounjaro (tirzepatide) is available through tier 3 specialist weight management services, but availability, waiting times, and costs vary dramatically by region and ICB (Integrated Care Board).
- NHS route: referral from your GP to specialist weight management services, then assessment and prescribing if eligible
- NHS waiting lists: can range from 3–18 months depending on your location
- Private route: online consultation with UK prescriber, faster access (24–48 hours), immediate cost to you
- NHS eligibility: BMI ≥30, or BMI 27–29.9 with weight-related health conditions; lower thresholds for South Asian and Black African heritage
Calculate your BMI using our free BMI calculator to check eligibility. If you need faster access or live in an area with long NHS waiting lists, private online prescribing may be a practical option. Always start with your GP to discuss which route suits your circumstances.
- 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 7.5mg more expensive than other doses?
No significant difference. Mounjaro cost is typically based on the full KwikPen (4 weekly doses) rather than individual dose strength. Whether you're on 2.5mg, 7.5mg, or 15mg, private costs remain similar per month—around £130–£250. NHS costs vary by region but are determined by your ICB.
Can I get Mounjaro 7.5mg on the NHS?
Yes, if you meet eligibility criteria (BMI ≥30 or BMI 27–29.9 with weight-related health conditions) and are referred to a tier 3 specialist weight management service. Availability depends on your region. Speak to your GP about referral and expected waiting times for your area.
What's included in the Mounjaro KwikPen price?
Each KwikPen contains 4 pre-filled injection pens—one week's dose per pen. The price you pay covers the full month's supply at your current dose. Storage is at home in a fridge (2–8°C) before first use, then at room temperature for up to 30 days after.
How long does a Mounjaro 7.5mg KwikPen last?
One KwikPen lasts exactly 4 weeks—you take one injection per week. At 7.5mg weekly, you'll use approximately 4 pens per month. Your prescriber will calculate how many pens to prescribe based on your ongoing treatment plan.
Are there any hidden costs with private Mounjaro prescriptions?
Main costs are consultation fee (if first-time user) and prescription cost. Some providers bundle these; others charge separately. Check with your provider upfront. No NHS prescription charges apply if dispensed privately, but you pay the full cost directly.
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.