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
Free tracker included with every download this week
Is Mounjaro Going Up In Price In The UK?
Mounjaro (tirzepatide) pricing in the UK has remained relatively stable, though costs can vary between private prescribing services. Currently, private Mounjaro prescriptions typically cost between ยฃ129 and ยฃ320 per month depending on dose and provider, with most patients spending ยฃ200โยฃ280 monthly. NHS access through specialist weight management services is free, but waiting lists are extensive in many regions. Prices may fluctuate due to supply, demand, and currency exchange rates, but no widespread significant increase has been announced. It's worth comparing costs across regulated UK pharmacies and understanding both NHS and private routes.
10,000+ calculations today ยท NHS-aligned thresholds ยท 100% free
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/mยฒ).
While BMI isn't a perfect measure โ it doesn't account for muscle mass, bone density, or fat distribution โ 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 โ 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.
What Does Mounjaro Cost On Private Prescription In The UK?
Private Mounjaro prescriptions in the UK typically range from ยฃ129 to ยฃ320 per month, with most patients paying between ยฃ200 and ยฃ280. Cost varies based on your dose โ starting doses (2.5 mg) are at the lower end, whilst maintenance and higher doses (10โ15 mg) cost more. Each KwikPen contains four weeks of injections, so your monthly cost reflects your current dose level. Some prescribing services offer dose-based pricing tiers, whilst others charge per pen. When comparing prices, ensure you're looking at GPhC-registered pharmacies dispensing genuine, UK-approved tirzepatide, not counterfeit or imported versions. Private prescription costs also include the online clinical consultation with a UK-licensed prescriber, which typically costs ยฃ15โยฃ50. Unlike the NHS, private providers do not receive bulk discounts, so prices reflect full retail cost.
Clinically BackedWeight Loss
No appointments. No waiting rooms. Just care โ 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 โ 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 โ completely free.
NHS Vs Private Access: How To Get Mounjaro In The UK
NHS route: Mounjaro is available through NICE-approved specialist weight management services (tier 3/4) โ completely free once prescribed. However, access requires GP referral and waiting lists can span 6โ18 months depending on your region. Private route: Available without NHS referral through GPhC-registered online pharmacies. You complete an online clinical assessment with a UK-licensed prescriber, who decides if Mounjaro is appropriate for you. If approved, your prescription is dispensed within 1โ3 working days. Private access is faster but comes with out-of-pocket costs. Many patients use our GLP-1 weight loss calculator to understand potential outcomes before committing to either route. Use the BMI calculator on this page to check your eligibility based on NHS guidelines (BMI 30+, or 27+ with weight-related health 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 โ 5mg โ 7.5mg โ 10mg โ 12.5mg โ 15mg
- GLP-1 receptor agonist
- Up to 15โ17% body weight loss (STEP trials)
- Weekly injection, 5-step dose escalation
- NHS & private prescription available
- Doses: 0.25mg โ 0.5mg โ 1mg โ 1.7mg โ 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 | 15โ22.5% | 12โ17% |
| Key trial | SURMOUNT-1 (2022) | STEP 1 (2021) |
| Max dose | 15 mg weekly | 2.4 mg weekly |
| Escalation period | 20โ32 weeks | 16โ20 weeks |
| Administration | Weekly injection (pen) | Weekly injection (pen) |
| NHS availability | Private prescription only | NHS & private |
| Approx. private cost | ยฃ150โยฃ250/month | ยฃ150โยฃ300/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 โ 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.
Will Mounjaro prices go up in the UK soon?
There's no confirmed announcement of widespread price increases. Private Mounjaro costs fluctuate based on supply chains and currency exchange, but prices have remained relatively stable since launch. NHS access is free and protected. If considering private prescription, lock in current pricing sooner rather than later, as future increases are possible due to demand and manufacturing costs.
Is Mounjaro cheaper on the NHS than private prescription?
Yes โ NHS Mounjaro is completely free once prescribed. However, accessing NHS Mounjaro requires specialist referral and can involve long waiting lists (6โ18 months in many regions). Private prescription costs ยฃ129โยฃ320/month but offers immediate access without referral. The choice depends on whether you prioritise cost or speed.
How much does a single Mounjaro KwikPen cost in the UK?
A single KwikPen (four-week supply at your current dose) costs approximately ยฃ50โยฃ80 privately, depending on dose and provider. However, most patients are quoted a monthly price rather than per-pen cost. Starting doses are cheaper than maintenance doses because they contain lower medication volumes.
Are there ways to reduce private Mounjaro costs in the UK?
Some online prescribing services offer loyalty discounts, bulk purchasing options, or dose-based savings. Compare prices across multiple GPhC-registered pharmacies. If cost is a barrier, discuss NHS referral options with your GP โ specialist services may prioritise those unable to afford private treatment. Some private providers also offer payment plans.
Why does Mounjaro cost more in the UK than in other countries?
UK pricing includes MHRA regulation, GPhC pharmacy standards, and UK-licensed prescriber consultation fees. Different countries have different healthcare systems, import duties, and pricing regulations. The UK price reflects local regulatory compliance and quality standards โ avoid suspiciously cheap sources, as they may not be genuine UK-regulated medication.
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.