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
Will Mounjaro Get Cheaper in the UK?
Mounjaro (tirzepatide) is currently available privately in the UK at costs ranging from approximately £129 to £320 per month, depending on your dose. Whether prices will decrease depends on several factors including market competition, NHS commissioning decisions, and patent expiry timelines. Understanding your current access options—both NHS and private—helps you make informed decisions about this prescription weight management medication.
10,000+ calculations today · NHS-aligned thresholds · 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/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 What Influences Cost
In the UK, private Mounjaro prescriptions typically cost between £129 and £320 per month, varying by dose and provider. The 2.5 mg starting dose is generally at the lower end, while the 15 mg maximum dose costs significantly more. Several factors influence pricing: wholesale costs of tirzepatide, pharmacy profit margins, prescriber consultation fees, and market competition. As more providers enter the private weight loss prescription market, competitive pricing has already pushed some costs down compared to early 2023 levels. Patent protection for tirzepatide extends well into the 2030s, meaning generic versions are unlikely in the near term—this typically keeps medication costs higher than they would be after patent expiry. NHS pricing is negotiated separately through NICE and ICBs (Integrated Care Boards), which may differ from private sector costs.
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 Routes and What to Expect
On the NHS, Mounjaro may eventually become available through tier 3 specialist weight management services if your local Integrated Care Board commissions it, but availability and waiting times vary significantly by region. Some areas already offer it; others have multi-year waiting lists. The private route involves an online consultation with a UK-licensed prescriber, a clinical assessment, and prescription dispensing through a GPhC-registered pharmacy—typically taking 1–2 days. Private costs are higher upfront but offer faster access without NHS waiting lists. Consider using our GLP-1 weight loss calculator to estimate potential outcomes and discuss costs with your prescriber before committing.
- 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.
Could Mounjaro prices fall significantly in the UK?
Price reductions typically occur after patent expiry (expected 2030s+) when generic tirzepatide becomes available. Until then, modest price competition may occur as more private providers enter the market, but substantial drops are unlikely. NHS commissioning may eventually offer lower costs through bulk negotiation.
Why is private Mounjaro more expensive than some other weight loss injections?
Tirzepatide (Mounjaro) is newer and still under patent protection, unlike some older GLP-1 medications. Dual-mechanism medications command premium pricing. Patent protection typically prevents generic versions for several years, keeping costs elevated compared to established alternatives like semaglutide.
Is Mounjaro available on the NHS in my area?
NHS access varies by region. Contact your local GP or Integrated Care Board to ask if Mounjaro is commissioned in your area. Some regions offer it through specialist weight management services; others do not yet. Waiting lists can be lengthy where available.
What's included in the private Mounjaro cost?
Private costs typically cover the prescriber consultation, clinical assessment, prescription, and medication supply. Some providers include follow-up support; others charge separately. Always clarify what's included before purchasing. Our BMI calculator can help establish your baseline before starting.
Could buying Mounjaro abroad be cheaper than UK private prices?
Importing prescription medications into the UK for personal use is technically legal but carries risks: no UK regulatory oversight, no local prescriber support, and potential quality issues. UK private prescriptions, though costly, ensure MHRA-approved medication and proper clinical monitoring.
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.