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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How to Order Mounjaro in the UK and What It Costs
If you're considering Mounjaro (tirzepatide) for weight management, you'll need to understand how to access it and what costs are involved in the UK. Mounjaro is available through both NHS specialist weight management services and private prescribing routes, though access, cost, and timelines differ significantly. This guide explains your options, eligibility requirements, and what to expect from the ordering process. Use our GLP-1 weight loss calculator to estimate potential weight loss at different Mounjaro doses before exploring your access options.
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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.
How to Access Mounjaro in the UK: NHS vs Private Routes
NHS Access: Mounjaro is approved by NICE for use within NHS tier 3 and 4 specialist weight management services. However, availability varies dramatically by region and integrated care board (ICB). You'll typically need a GP referral to a specialist weight management clinic, where your eligibility will be assessed. NHS waiting lists for these services can be several months to over a year in many areas. Once approved, NHS Mounjaro is provided at no prescription cost (standard NHS prescription charge applies, or free if you qualify for exemptions).
- NHS route: GP referral → specialist assessment → prescription issued → free or £11.65 per item (2025 rate)
- Private route: online consultation → clinical assessment → prescription issued → private pharmacy dispensing → £129–£320+ per month depending on dose
Private Access: Private online prescribing services offer faster access without NHS referral. A UK-licensed prescriber conducts an online consultation, reviews your medical history, and issues a prescription if appropriate. This is then dispensed by a GPhC-registered pharmacy. Private costs depend on the Mounjaro dose you're prescribed (2.5 mg starter dose is typically cheaper than maximum 15 mg maintenance doses). Most private providers also include ongoing support and dose escalation guidance.
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.
Private Mounjaro Cost Range and What Affects Pricing
Private Mounjaro costs in the UK typically range from £129–£320+ per month, depending on your dose. Starter doses (2.5 mg, 5 mg) are at the lower end, whilst maintenance doses (10–15 mg) are more expensive. Each KwikPen contains four weekly injections, so monthly costs reflect a full month's supply at your current dose. Some private providers include the consultation fee within the medication cost; others charge separately (typically £30–£60). Your dose will escalate every 4 weeks during the titration phase, so your monthly costs will gradually increase as you progress through doses. Always clarify the full cost breakdown before ordering, including whether consultations and dose escalation follow-ups are included.
- 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.
Can I order Mounjaro without a prescription in the UK?
No. Mounjaro is a prescription-only medicine in the UK. You must have a prescription from a UK-licensed prescriber (either NHS or private) before any pharmacy can dispense it. Online prescribing services make this faster and easier than NHS routes, but a clinical assessment is always required first.
How long does it take to get Mounjaro on the NHS?
NHS timelines vary significantly by region. Most specialist weight management services have waiting lists of 3–12 months for initial assessment. Once assessed and approved, Mounjaro may be issued immediately or after a short delay. Private routes typically provide prescriptions within 24–48 hours of online consultation.
What's the difference between Mounjaro and Wegovy costs?
Both are similar in price at equivalent therapeutic doses. Mounjaro's maximum dose (15 mg) may cost slightly more than Wegovy's maximum (2.4 mg) because the dosing units differ. Compare costs at your likely prescribed dose rather than maximum dose, as most people stabilise at mid-range doses.
Does private Mounjaro cost include follow-up appointments?
This varies by provider. Some include follow-up consultations and dose escalation guidance in the medication price; others charge separately. Always confirm what's included before ordering. Many providers offer nurse-led follow-up support to monitor side effects and guide dose increases.
Can I claim Mounjaro on private health insurance?
Some private health insurance policies cover weight management medications, but most do not. Check with your provider before ordering privately. NHS coverage depends on your local ICB's commissioning decisions, which vary by region.
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.