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 5mg Cost in the UK: NHS and Private Pricing
If you're considering Mounjaro for weight management in the UK, understanding the cost and how to access it is essential. The 5mg dose is often a maintenance dose used after the initial titration phase. Costs vary significantly depending on whether you access Mounjaro through the NHS or privately. This guide explains the pricing landscape, helps you understand what affects cost, and clarifies the different routes available to UK adults seeking this prescription weight loss injection.
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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.
Private Mounjaro 5mg Pricing in the UK
Private prescription costs for Mounjaro 5mg typically range from £150 to £250 per month, depending on your prescriber and pharmacy. Each KwikPen contains four weekly doses, so a monthly supply represents four weeks of treatment. The price covers the medication and clinical assessment through an online consultation with a UK-licensed prescriber.
- Most private prescribers charge a consultation fee (typically £15–£40) in addition to medication cost
- Prices may vary between providers — it's worth comparing before committing
- Some providers offer subscription models with discounts for longer-term commitments
- Payment is usually required upfront or at the point of prescription
Unlike some weight loss medications, Mounjaro prices remain relatively consistent across UK private providers because it's a prescription-only medicine with a fixed wholesale cost. You can also use our GLP-1 weight loss calculator to estimate potential results at the 5mg dose, which may help inform your decision.
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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 Prescription Routes
Accessing Mounjaro through the NHS is free at point of use, but availability is extremely limited. NICE has approved tirzepatide (Mounjaro) for NHS weight management services, but only through specialist tier 3 and tier 4 services. Most UK adults face significant waiting lists (often 12–36 months) or may not have access at all, depending on their local integrated care board (ICB).
Private access is faster: An online consultation with a prescriber takes 24–48 hours, and you can start treatment within days. The private route doesn't require an NHS referral. Your GP can advise whether NHS access is available in your area, and our BMI calculator can help determine if you meet eligibility criteria (typically BMI 30 or above, or BMI 27+ with weight-related health conditions).
- 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 Mounjaro 5mg cheaper on the NHS than private?
Yes — it's free on the NHS. However, NHS access is limited to specialist weight management services with long waiting lists. Private prescription typically costs £150–£250 per month including clinical assessment. Check with your local ICB whether NHS access is available in your area.
Does the 5mg dose cost more than other Mounjaro doses?
No. Private pricing is typically based on the full KwikPen (four-week supply) rather than individual doses, so 2.5mg, 5mg, 7.5mg, and 10mg pens usually cost the same. Maximum-dose pens (12.5mg and 15mg) may have slightly different pricing.
What's included in the Mounjaro 5mg private prescription cost?
The cost typically includes the medication (KwikPen), the online clinical assessment with a UK-licensed prescriber, and prescription issuance. Some providers include follow-up support or nurse consultations. Always clarify what's included before ordering.
How long does a 5mg KwikPen last?
Each KwikPen contains four weekly injections, so one pen lasts four weeks (approximately one month). At 5mg weekly, you'd need about 12 pens per year if staying at maintenance dose, though many people increase to higher doses during titration.
Can I get Mounjaro 5mg prescribed privately without waiting for NHS?
Yes. Private online prescribers in the UK can assess and prescribe Mounjaro to eligible adults within 24–48 hours. You'll need a consultation confirming you meet eligibility criteria (BMI 30+ or BMI 27+ with weight-related health conditions) and have no contraindications.
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.