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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Mounjaro 7.5 mg Price in the UK
Mounjaro (tirzepatide) 7.5 mg is a mid-range dose used during the escalation phase of treatment, typically weeks 9–12. UK pricing varies significantly depending on whether you access this prescription weight loss injection through the NHS or privately. This guide explains current costs, eligibility, and what factors affect the price you'll pay in the UK.
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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 7.5 mg Cost in the UK
The 7.5 mg dose of Mounjaro is an intermediate step in the dose escalation schedule — it comes after the 5 mg starting dose and before the 10 mg maintenance dose. Pricing in the UK depends entirely on your access route:
- NHS access: Free at point of use if prescribed through a tier 3 specialist weight management service, though availability varies significantly by region and waiting lists can be substantial
- Private access: Typically £180–£250 per KwikPen (4-week supply) depending on the pharmacy and whether you qualify for any discounts
Each KwikPen contains four pre-filled injections, meaning one pen covers four weeks at the 7.5 mg weekly dose. Private pricing often includes the online clinical consultation fee, which ranges from £30–£50 additional.
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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.
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NHS vs Private Mounjaro Access
Accessing Mounjaro through the NHS means going through your GP for a referral to a specialist weight management service, which typically involves assessment against NICE guidance. However, NHS availability is inconsistent — some areas have waiting lists exceeding 12 months, while others may not offer tirzepatide at all. Private access through a GPhC-registered online pharmacy is faster: you complete an online assessment with a UK-licensed prescriber, receive a prescription if suitable, and can collect from a pharmacy within days. Use our free GLP-1 weight loss calculator to estimate potential results at this dose before deciding which route suits you.
- 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.
Why is the 7.5 mg Mounjaro dose used?
The 7.5 mg dose is part of Mounjaro's standard escalation schedule. You start at 2.5 mg, increase to 5 mg after 4 weeks, then to 7.5 mg if needed. This gradual approach helps your body adjust and allows your prescriber to monitor how well the medication works for you before considering higher doses.
How long do I stay on 7.5 mg Mounjaro?
Most people stay on each dose for a minimum of 4 weeks before escalating. At 7.5 mg, if you're responding well and tolerating it, you may continue for several weeks or months, or your prescriber may escalate to 10 mg. This depends on your individual response, side effects, and weight loss progress.
Can I buy Mounjaro 7.5 mg without a prescription?
No. Mounjaro is prescription-only in the UK. You cannot buy it over-the-counter or without a clinical assessment. A UK-licensed prescriber must assess your eligibility before issuing a prescription, regardless of whether you use NHS or private access.
Is Mounjaro 7.5 mg more expensive than lower doses?
No — pricing is typically the same per KwikPen regardless of the dose strength it contains. One pen (containing four weekly injections at any dose level) costs roughly £180–£250 privately. NHS access is free once prescribed, though you may wait months for availability.
What's the difference between Mounjaro and Wegovy at this dose level?
Mounjaro is a dual GIP and GLP-1 agonist, while Wegovy (semaglutide) activates only the GLP-1 pathway. At 7.5 mg, Mounjaro is roughly equivalent to Wegovy's 1.7 mg dose. Clinical trials showed Mounjaro users lost approximately 15–20% of body weight on average, though results vary significantly between individuals.
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