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 a 10mg Mounjaro Pen Cost in the UK?
A 10mg Mounjaro KwikPen is one of the mid-range maintenance doses of tirzepatide, typically prescribed after dose titration. The cost of a 10mg Mounjaro pen in the UK varies significantly depending on whether you access it through the NHS or via private prescription. Most UK adults find Mounjaro more affordable through private online prescription services than paying for the medication out of pocket without any assessment. Understanding your access routes — and what each one costs — helps you make an informed decision about weight management treatment. Our GLP-1 weight loss calculator can help you explore potential outcomes at the 10mg dose alongside lifestyle changes.
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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.
Private Prescription Costs for 10mg Mounjaro in the UK
A 10mg Mounjaro pen (one 4-week supply) through private prescription typically costs between £180–£220 in the UK, depending on the provider and whether any consultation or ongoing support is included. This is the most common access route for UK adults, as NHS availability through specialist services remains very limited in most regions.
- Private online prescription services require a clinical assessment by a UK-licensed prescriber — usually a straightforward online questionnaire taking 10–15 minutes
- Once approved, your prescription is sent to a GPhC-registered pharmacy for dispensing
- Each KwikPen contains four weekly injections (equivalent to one month's supply)
- Monthly costs are roughly the same regardless of dose — 2.5mg, 5mg, 10mg, 15mg all cost similarly per pen
- Some providers bundle consultations or follow-up support, which may affect the final price
It's worth checking multiple providers, as costs and included services vary. Tirzepatide (the active ingredient in Mounjaro) has the same cost structure across all licensed providers in the UK.
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 Access vs Private Routes — What's the Real Timeline?
NHS access: NICE approved tirzepatide for NHS use within specialist weight management services, but access is extremely limited. Referral to a tier 3/4 service through your GP is required, and waiting lists in many regions exceed 12–24 months. NHS prescription is free, but the waiting period deters many people from pursuing this route.
Private access: Much faster — typically 24–48 hours from online assessment to receiving your first pen. No NHS referral needed. You manage your prescription and supply directly with the provider. This speed and convenience explains why the majority of UK adults access Mounjaro privately, despite the £180–£220 monthly cost.
Use our free GLP-1 weight loss calculator to explore expected outcomes at the 10mg dose, and our progress tracker to monitor your results once you start treatment.
- 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 10mg a common Mounjaro maintenance dose?
Yes. The standard Mounjaro dose titration moves from 2.5mg through 5mg, 7.5mg, and 10mg, with at least 4 weeks at each dose. Many people achieve good results at 5mg or 10mg and stay at that dose long-term, while others escalate to 12.5mg or 15mg for greater effect. Your prescriber will advise based on your progress and tolerability.
Why is private Mounjaro cheaper than buying it without a prescription?
Private prescription fees (£180–£220 per pen) include the clinical assessment and pharmacy dispensing. Buying Mounjaro without a prescription would be illegal in the UK — it's prescription-only. Private services offer the most affordable legal route; NHS is free but has very long waiting lists.
Can I get a 10mg Mounjaro pen on the NHS?
NICE has approved tirzepatide for NHS weight management services, but access is restricted to specialist tier 3/4 services. Most areas have long waiting lists (12–24 months or more). You must be referred by your GP, and eligibility depends on BMI and comorbidities. Check with your local NHS integrated care board for current availability.
Does the cost of Mounjaro change if I stay on 10mg long-term?
No. Private prescription costs remain roughly the same per pen regardless of dose — 2.5mg through 15mg all cost around £180–£220 per month. Some long-term patients negotiate slightly lower rates with providers, but costs are fairly consistent. Check current pricing with your chosen provider.
How does tirzepatide (Mounjaro) cost compare to Wegovy?
Both cost around £180–£220 per month through UK private prescription services. The main difference is that Mounjaro is a dual GIP+GLP-1 receptor agonist (potentially more effective for some people), while Wegovy is GLP-1 only. Clinical trial data shows Mounjaro may help slightly more weight loss on average, but individual results vary significantly.
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.