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 much does a 10mg Mounjaro pen cost in the UK?
The cost of a 10mg Mounjaro KwikPen varies significantly depending on whether you access it through the NHS or privately in the UK. While prices aren't standardised across all private providers, a single 10mg dose typically falls somewhere in the mid-range of treatment costs. This guide explains pricing factors, eligibility, and your options for accessing tirzepatide at this dose. Remember that cost should never be the only factor when choosing a weight management approach—effectiveness and safety matter just as much.
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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 10mg pricing and access in the UK
Private pricing: A 10mg Mounjaro pen from UK-registered online pharmacies typically costs between £180–£280 per pen, depending on the provider and whether you're accessing it for the first time or as a repeat prescription. This usually includes the online consultation fee with a UK-licensed prescriber. Each KwikPen contains 4 weekly injections, so you'll need a new pen each month.
NHS access: Mounjaro (tirzepatide) is available on the NHS through specialist tier 3 weight management services, but only after referral from your GP. NHS availability varies significantly by region and local Integrated Care Board (ICB) decisions. Waiting lists for NHS specialist services can be substantial—often months to over a year in many areas. When available on the NHS, there is no direct cost to you, though availability is not assured in all regions.
- Prescription-only medicine—requires clinical assessment
- Available with lower BMI thresholds for South Asian, Chinese, Black African, and Caribbean backgrounds
- Dose titration typically takes 16+ weeks to reach 10mg
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.
What affects the price of Mounjaro in the UK?
Several factors influence what you'll pay for a Mounjaro 10mg pen privately. Provider competition means prices vary—larger platforms often offer lower costs than smaller clinics. Consultation model affects pricing too: some providers bundle the prescription fee into the medication cost, whilst others charge separately. Repeat prescriptions may be cheaper than initial consultations since you won't need a full assessment each time. The 10mg dose sits in the middle of the dosing range (2.5–15mg), so it's typically priced lower than the maximum 15mg dose but higher than starter doses. Always compare the total cost, including any follow-up consultation fees, rather than just the pen price.
Getting the best value for Mounjaro treatmentIf cost is a concern, consider asking your GP about NHS referral to a specialist weight management service first—there may be a waiting list, but NHS treatment is free once approved. Private providers sometimes offer discounts for multi-month packages or subscription models. Use our free GLP-1 weight loss calculator to project your potential results at the 10mg dose, helping you understand the value of the investment. Check that any provider is GPhC-registered and that the prescriber is UK-licensed. Never choose based on price alone—safety, clinical support, and follow-up care matter significantly. If 10mg doesn't suit your budget, discuss lower or higher doses with your prescriber, as they may work equally well for your individual needs.
- 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 there a cheaper alternative to Mounjaro 10mg?
Wegovy (semaglutide) may have different pricing at equivalent effectiveness levels—compare costs across providers. Liraglutide (Saxenda) is a daily injection alternative, though pricing is similar. NHS access is free if eligible, though waiting lists vary by region. Always discuss options with your prescriber.
Do I have to buy a full 10mg pen or can I start at a lower dose?
You cannot buy just a single 10mg dose—Mounjaro pens come pre-filled with 4 weekly injections at the stated strength. Most people start at 2.5mg and increase gradually over 16+ weeks to reach 10mg, so you'll purchase multiple pens over time.
Is the 10mg Mounjaro pen available on the NHS in my area?
NHS availability depends on your local Integrated Care Board (ICB) and tier 3 specialist weight management services. Ask your GP to check local commissioning, or contact your local weight management service directly. Waiting times vary from weeks to over a year.
What's included in the price of a private Mounjaro prescription?
Most private providers include the online clinical consultation, prescriber assessment, and the pen itself in the quoted price. However, some charge separately for follow-up consultations or dose adjustments. Always confirm what's included before purchasing.
Why is Mounjaro more expensive than some other weight loss injections?
Mounjaro (tirzepatide) is a dual GIP and GLP-1 receptor agonist—more complex to manufacture than single-mechanism injections like Wegovy (semaglutide). Patent protection and manufacturing costs influence pricing. Clinical trial data suggests similar or slightly better average weight loss compared to some alternatives.
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.