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
How Much Does Mounjaro 7.5mg Cost in the UK?
Mounjaro (tirzepatide) 7.5mg is the second escalation dose in the Mounjaro treatment pathway, typically reached after 8–12 weeks of treatment. The cost of Mounjaro 7.5mg varies significantly depending on whether you access it through the NHS or privately. On the NHS, there is no direct patient cost if prescribed through a tier 3 specialist weight management service—the cost is covered by your ICB (Integrated Care Board). Privately, a single 7.5mg KwikPen (four weekly injections) typically costs between £180–£250, depending on the online prescribing provider. Our GLP-1 weight loss calculator can help you understand projected outcomes at different Mounjaro doses, while our BMI calculator helps determine your starting eligibility.
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.
NHS vs Private Access for Mounjaro 7.5mg in the UK
NHS Access: If you receive a Mounjaro prescription through an NHS tier 3 specialist weight management service, there is no direct medication cost—the prescription is dispensed free through the NHS. However, NHS access is limited by regional availability and lengthy waiting lists in many areas. You must be referred by your GP and meet clinical eligibility criteria: BMI of 30 or above, or BMI of 27–29.9 with weight-related comorbidities such as type 2 diabetes, hypertension, or cardiovascular disease. The escalation to 7.5mg would occur within the NHS pathway following clinical assessment.
Private Access: You can obtain Mounjaro through GPhC-registered online pharmacies following a clinical assessment with a UK-licensed prescriber. Private prescribing typically costs £180–£250 per 7.5mg KwikPen (four weeks' supply). This route offers faster access without NHS referral, but requires direct payment. Private costs vary by provider and may be lower at higher doses due to bulk pricing.
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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.
Tirzepatide Dose Escalation and Clinical Context
The Mounjaro dose pathway involves gradual escalation: starting at 2.5mg, then increasing to 5mg, 7.5mg, 10mg, 12.5mg, and finally 15mg based on individual tolerability and clinical response. Each dose is maintained for at least 4 weeks before escalation. Reaching 7.5mg typically represents 8–16 weeks into treatment. NICE guidance supports Mounjaro prescribing within specialist NHS services for eligible adults, though regional implementation varies significantly. Cost comparisons should consider not just the per-dose price but also the clinical outcome achieved. Our progress tracker allows you to log your weight loss journey and monitor the real-world results you're experiencing at each dose level.
- 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 free on the NHS?
Mounjaro prescribed through an NHS tier 3 specialist weight management service is free at the point of dispensing. However, NHS availability is limited by regional variation and waiting lists can be lengthy. Private prescribing costs £180–£250 per KwikPen depending on dose and provider.
How long does it take to reach the 7.5mg dose of Mounjaro?
The standard Mounjaro escalation pathway takes approximately 8–16 weeks to reach 7.5mg. You start at 2.5mg for weeks 1–4, increase to 5mg for weeks 5–8, then escalate to 7.5mg for weeks 9–12. Your prescriber may adjust this based on tolerability and clinical response.
What is the difference between Mounjaro 7.5mg and Wegovy at equivalent doses?
Mounjaro is a dual GIP and GLP-1 receptor agonist, while Wegovy is a GLP-1 agonist only. Clinical trials suggest Mounjaro may produce slightly greater average weight loss, though individual results vary significantly. Both require prescriptions and clinical assessment.
Can I get Mounjaro 7.5mg cheaper through private prescribing?
Private costs typically range £180–£250 per KwikPen at 7.5mg. Some providers offer bulk discounts or subscription models that may reduce per-dose cost. Always verify the prescriber is UK-licensed and the pharmacy is GPhC-registered before ordering.
What eligibility criteria do I need to meet for NHS Mounjaro?
NHS eligibility requires BMI of 30 or above, or BMI of 27–29.9 with weight-related health conditions (diabetes, hypertension, cardiovascular disease, sleep apnoea). You must be referred to a tier 3 specialist service by your GP. South Asian, Chinese, Black African, and Black Caribbean adults may qualify at lower BMI thresholds due to higher health risks at lower weights.
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.