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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Is Mounjaro Price Going Down in the UK?
Mounjaro (tirzepatide) costs between £129 and £320 per month in the UK when prescribed privately, depending on your dose level. Many people ask whether prices are falling — currently, costs remain relatively stable, though private prescribing competition is gradually increasing choice. This guide explains current UK Mounjaro pricing, how to access it through NHS or private routes, and what affects the overall cost of your treatment.
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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.
Current Mounjaro Pricing and Private Access in the UK
Private Mounjaro costs typically range from £129 to £320 per month depending on your dose and provider. The starting dose (2.5 mg) is usually the lowest cost, while higher maintenance doses (10–15 mg) cost more. A standard monthly supply includes four pre-filled KwikPen devices (4 weeks of injections). Prices vary between GPhC-registered online pharmacies and private prescribing services — some providers offer subscription models or bulk discounts that can reduce per-month costs.
Several factors influence your final cost: your current dose, whether you're on a starter dose or maintenance dose, frequency of dose increases, and which provider you choose. Private prescribers typically charge a consultation fee (£25–£50) on top of medication costs. Unlike NHS prescriptions, private Mounjaro is not subject to the standard prescription charge — you pay the full market price set by the provider.
- Starter dose (2.5 mg): typically £129–£150/month
- Mid-range doses (5–7.5 mg): typically £180–£220/month
- Higher doses (10–15 mg): typically £250–£320/month
Clinically BackedWeight Loss
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 Access vs Private Cost — What Are Your Options?
NHS access to Mounjaro is free at the point of use but limited. NICE has approved tirzepatide for specialist weight management services, meaning you must be referred to a tier 3 or 4 NHS weight management service by your GP. Waiting times vary dramatically by region — some areas have waiting lists exceeding 12–18 months, while others have shorter delays. Private access bypasses waiting lists but requires you to pay the full cost upfront.
To access Mounjaro privately, you complete an online clinical assessment with a UK-licensed prescriber. If approved, your prescription is sent to a GPhC-registered pharmacy for dispensing. This process typically takes 1–3 days from consultation to receiving your first dose. Your prescriber will assess your BMI, health history, and eligibility before issuing a prescription. Our free GLP-1 weight loss calculator can help you explore potential outcomes alongside cost considerations.
- 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 getting cheaper in the UK?
Currently, Mounjaro pricing remains stable across most UK providers. Prices may gradually decrease as more competition enters the private prescribing market and tirzepatide supply increases. However, no significant price drops have occurred recently. Monitor prices across providers, as some offer subscription discounts or bulk purchase savings.
Why is private Mounjaro so expensive compared to other countries?
UK private pricing reflects UK market conditions, GPhC regulation compliance, prescriber consultation fees, and pharmaceutical supply chain costs. NHS supply is subsidised through bulk purchasing agreements. Private prescribing must cover all costs plus business operating expenses, which makes out-of-pocket prices higher than NHS-covered treatment.
Can I get Mounjaro cheaper on the NHS?
Yes — if you can access NHS specialist weight management services, Mounjaro is provided free of charge. However, you must be referred by your GP and meet NHS eligibility criteria (BMI ≥30, or 27–29.9 with weight-related comorbidities). Waiting lists in many regions are very long. Contact your local Integrated Care Board to check availability.
How much does a year of Mounjaro cost privately?
At average mid-range doses (5–7.5 mg), annual private Mounjaro costs approximately £2,160–£2,640. This assumes stable dosing without further increases. Initial dose titration (starting at 2.5 mg) costs less in early weeks, while increasing to higher maintenance doses costs more. Use our GLP-1 weight loss calculator to estimate your potential dose pathway and associated costs.
Are there ways to reduce Mounjaro costs privately in the UK?
Some providers offer subscription discounts (5–15% off), bulk-month purchasing plans, or loyalty programmes. Compare prices across different GPhC-registered pharmacies and prescribing services. Some people use private prescribing for initial doses and then seek NHS transfer once on maintenance therapy, though this requires GP coordination.
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.