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
Mounjaro Jabs Reviews — UK Cost & Access
Mounjaro (tirzepatide) is a prescription-only weight management injection available in the UK through both NHS specialist services and private online prescribing. If you're considering this treatment, understanding the cost, access routes, and eligibility is essential. This guide covers what real UK users report about accessing Mounjaro, how much it typically costs, and whether you qualify for NHS support or private prescription.
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.
Mounjaro Cost in the UK — Private vs NHS Access
Private prescription costs for Mounjaro vary by dose and provider, typically ranging from £129 to £320 per month for standard doses. The 2.5 mg starting dose is usually the least expensive, with costs increasing at higher doses like 10 mg and 15 mg. Each KwikPen contains 4 weekly injections, so monthly costs reflect a 4-week supply.
- 2.5 mg (starter dose): approximately £129–£180/month
- 5–7.5 mg (mid-range): approximately £180–£240/month
- 10–15 mg (higher doses): approximately £240–£320/month
NHS access is typically free at point of use through specialist tier 3 weight management services, but availability and waiting times vary significantly by region. Some areas have substantial waiting lists. Private routes offer faster access without NHS referral, though you'll need a clinical assessment from a UK-licensed prescriber before prescription.
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.
How to Access Mounjaro in the UK — NHS vs Private Routes
NHS route: Your GP refers you to a specialist weight management service (tier 3), where a prescriber assesses your eligibility based on BMI and health conditions. NHS prescription is free, but waiting lists can extend several months in some regions.
Private route: You complete an online consultation with a UK-licensed prescriber, who issues a prescription if you're clinically suitable. A GPhC-registered pharmacy dispenses the medication. This bypasses waiting lists and offers quicker access, though you pay the full cost. The online assessment typically takes 15–20 minutes and asks about your medical history, current medications, and weight management goals.
- 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.
What do UK users report about Mounjaro results in reviews?
Real-world reports from UK users vary significantly. Many report appetite reduction, reduced food cravings, and weight loss over 3–6 months. Results depend on dose, adherence to diet and exercise, and individual response. Some experience side effects like nausea initially, though these often settle within weeks. Always consult a prescriber about what to realistically expect.
Can I get Mounjaro through the NHS in the UK?
Yes, Mounjaro is available through NHS specialist weight management services for eligible adults. You need a GP referral to tier 3 services and must meet BMI and health criteria. Availability and waiting times vary by region (ICB). Private prescription is faster but requires payment.
Is Mounjaro cheaper through the NHS or private prescription in the UK?
NHS prescription is free at point of use. Private prescription costs £129–£320/month depending on dose. If you can access NHS services without excessive waiting, this is the more cost-effective route. Private access is faster but significantly more expensive.
What happens during an online consultation for private Mounjaro prescription?
You'll be asked about your weight, height, BMI, medical history, current medications, and weight loss goals. The prescriber assesses eligibility based on MHRA guidelines. If approved, a prescription is issued and sent to a GPhC-registered pharmacy for dispensing. Consultations typically take 15–20 minutes.
How do Mounjaro costs compare to Wegovy in the UK?
Both medications cost similarly through private prescription (£129–£320/month). Mounjaro is a dual GIP/GLP-1 agonist, whilst Wegovy is GLP-1 only. Clinical trials show Mounjaro may have slightly higher average weight loss, though individual results vary. Your prescriber can discuss which suits your circumstances better.
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.