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 Price Hike UK — What You Need to Know
Mounjaro (tirzepatide) costs have increased in the UK, affecting both NHS and private access routes. Understanding current pricing, availability through the NHS, and private prescription options can help you explore what weight loss treatment options are realistic for your situation. This guide covers actual UK costs, how to access Mounjaro through different routes, and what factors influence pricing in 2025.
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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.
Current Mounjaro Costs in the UK
Private prescription costs for Mounjaro vary by dose and provider. At starting doses (2.5–5 mg), expect to pay approximately £129–£179 per month. Mid-range doses (7.5–10 mg) typically cost £179–£249 per month. Higher doses (12.5–15 mg) can reach £249–£320+ per month. Each Mounjaro KwikPen contains four weekly doses (one month supply). Pricing differences exist between different GPhC-registered online pharmacies, so comparing costs across providers is worthwhile. Some private services offer package pricing if you commit to several months upfront, which may reduce the per-dose cost. NHS access through specialist tier 3 weight management services remains free at point of use, though availability and waiting times vary significantly by region and local integrated care board (ICB) decisions. NICE guidance supports tirzepatide use within NHS services, but access is restricted compared to private routes.
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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 Routes
The NHS route requires referral to a specialist weight management service through your GP and can involve waiting lists of months to years depending on your area. Once approved, Mounjaro is dispensed free, but not all regions have active specialist services or current capacity. Private access is faster—online consultations typically take 24–48 hours, with a prescription issued if clinically appropriate following assessment by a UK-licensed prescriber. Private prescriptions are then dispensed by GPhC-registered pharmacies. You do not need NHS referral for the private route. Both routes require a clinical assessment: your BMI, weight-related health conditions, current medications, and medical history are evaluated to ensure the medication is safe and appropriate for you. Neither route is suitable for pregnant women, those under 18, or people with certain medical conditions.
- 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.
Has Mounjaro price increased in the UK recently?
Yes, Mounjaro prices have increased over 2024–2025. Starting doses now typically cost £129–£179/month privately, up from previous rates. Prices vary by provider and dose level. NHS access through specialist services remains free but availability varies by region. Use our free BMI calculator to check if you meet eligibility criteria (BMI 30+ or 27+ with weight-related conditions).
What is the difference between NHS and private Mounjaro access?
NHS access requires GP referral to a tier 3 specialist weight management service—free but with potential waiting lists of months or years. Private access is faster (24–48 hours) through online consultation with a licensed prescriber, but costs £129–£320+/month depending on dose. Both require clinical assessment. Individual results vary with either route.
Why does Mounjaro cost more than Wegovy in the UK?
Mounjaro (tirzepatide) has a dual mechanism (GIP + GLP-1 agonist) versus Wegovy's single GLP-1 mechanism. Higher manufacturing costs and demand contribute to pricing differences. In clinical trials, both showed significant weight loss—individual response varies. Compare options with a prescriber to determine which suits your situation and budget.
How can I get a Mounjaro prescription privately in the UK?
Complete an online consultation with a UK-licensed prescriber through a private weight management provider. You'll be assessed on BMI, health conditions, and medications. If approved, a prescription is issued and dispensed by a GPhC-registered pharmacy. The entire process typically takes 24–48 hours. Prescription-only status means clinical assessment is mandatory.
Is Mounjaro available on the NHS in my area?
NICE recommends tirzepatide access through NHS tier 3 specialist weight management services, but availability varies by region and ICB funding. Contact your GP to ask if your local service offers Mounjaro, or check your ICB website for current guidance. Waiting lists exist in many areas. Our GLP-1 weight loss calculator can help you estimate potential results at different doses while you explore access options.
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.