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 Maintenance: Cost & Access in the UK
Mounjaro maintenance involves staying on your regular tirzepatide dose once you've reached the level that's working for you. Understanding the cost and access routes — whether through the NHS or private prescription — helps you plan your weight management journey. Once you reach your target maintenance dose (typically between 5 mg and 15 mg weekly), your ongoing costs and access route depend on whether you're being a UK pharmacy through the NHS or a private online prescriber. This guide covers what you need to know about maintaining Mounjaro treatment in the UK.
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.
Private Mounjaro Maintenance Costs in the UK
Private prescription costs for Mounjaro maintenance vary depending on your dose. Generally, a monthly supply of Mounjaro costs between £129 and £320, with higher doses commanding higher prices. At maintenance dose (typically 10 mg or 15 mg), you'll usually pay towards the upper end of this range. Each KwikPen contains four weekly doses, so one pen lasts one month. Costs are calculated per dose level, not per individual injection. Many private online prescribers offer repeat prescription arrangements, allowing you to order your next supply automatically each month. Some providers offer subscription models that may reduce per-dose costs if you commit to regular refills. It's worth comparing prices across GPhC-registered pharmacies, as costs can vary. Remember that private prescription costs are not covered by the NHS, so you'll pay the full amount yourself. Your prescriber will confirm the exact cost for your maintenance dose before you proceed.
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 vs Private Access for Mounjaro Maintenance
NHS route: Mounjaro is available through NHS specialist tier 3 weight management services following referral from your GP. However, availability is extremely limited and varies significantly by region. Some ICBs (Integrated Care Boards) do not currently commission Mounjaro, and waiting lists for specialist services can stretch several months to over a year. If you are receiving Mounjaro through the NHS, maintenance is free on prescription. Private route: Private online consultations with UK-licensed prescribers allow faster access without waiting lists. After a clinical assessment, prescriptions are issued within 24–48 hours and dispensed by GPhC-registered pharmacies. This route suits those who want immediate access or where NHS waiting lists are prohibitive. Choose based on your timeline, regional NHS availability, and budget.
- 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.
How much does Mounjaro maintenance cost per month on private prescription in the UK?
Private Mounjaro maintenance typically costs £129–£320 per month, depending on your dose level. A KwikPen containing four weekly injections lasts one month. At maintenance doses (10 mg or 15 mg), expect to pay towards the higher end. Some providers offer subscription discounts. Always check current prices with GPhC-registered pharmacies, as costs vary.
Can I get Mounjaro on the NHS for long-term maintenance?
Yes, Mounjaro is available through NHS specialist weight management services (tier 3), and maintenance is free on prescription. However, NHS access is extremely limited. Referral requires a GP, and many regions have long waiting lists or do not currently commission Mounjaro. Check your local ICB's commissioning status and discuss options with your GP.
How do I access Mounjaro maintenance privately in the UK?
Book an online consultation with a UK-licensed prescriber through a private provider. After clinical assessment, your prescription is issued within 24–48 hours. Once approved, you order your KwikPen from a GPhC-registered pharmacy each month. Use our GLP-1 weight loss calculator to estimate potential costs and outcomes at your maintenance dose.
What's included in the cost of Mounjaro maintenance prescription?
The cost covers the KwikPen itself (four weekly doses) and pharmacy dispensing. Clinical consultation fees may apply upfront; some providers bundle this into the prescription cost. Check whether follow-up consultations are included. Costs do not cover GP appointments or any complications that require NHS care.
Will my Mounjaro maintenance costs decrease after the first year?
Private prescription costs remain consistent month-to-month at your maintenance dose. Some providers offer loyalty or subscription discounts for regular refills. NHS costs remain free if you access through specialist services. Costs do not decrease based on duration — they depend on your dose level only.
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.