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 Mounjaro 5mg Cost in the UK?
Mounjaro 5mg (tirzepatide) is typically the first maintenance dose after dose escalation. In the UK, private prescription costs for Mounjaro 5mg generally range from £129 to £180 per month, though prices vary between registered pharmacies. NHS access is available through specialist weight management services, though availability varies significantly by region. Whether you're accessing Mounjaro through the NHS or privately, it's prescribed as a once-weekly injection and requires a clinical assessment from a licensed UK prescriber to confirm you meet eligibility criteria.
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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.
Mounjaro 5mg Pricing and Private Access in the UK
Private prescription costs for Mounjaro 5mg in the UK typically fall between £129 and £180 per month, depending on your chosen provider and any available discounts. Each KwikPen contains four weekly doses (a four-week supply), so monthly cost usually reflects this supply period. Prices can vary based on factors including the prescriber's consultation fee, dispensing pharmacy, and promotional offers from private providers.
What's included in the price:
- Licensed UK prescriber's clinical assessment and prescription
- Four pre-filled KwikPen devices (4 weeks supply)
- Pharmacy dispensing and delivery
- Access to online support or guidance (with some providers)
Many providers offer subscription or bulk purchase discounts. You can access Mounjaro privately without an NHS referral, following an online consultation with a UK-registered prescriber who will assess your eligibility based on BMI, health conditions, and medical history. Unlike Wegovy or other GLP-1 alternatives, tirzepatide's dual GIP and GLP-1 mechanism may influence prescriber recommendations based on individual clinical needs.
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: Which Route for You?
NHS access: Mounjaro is approved by NICE for use within NHS specialist weight management services (tier 3/4). However, access is typically via referral from your GP to a regional weight management service. Availability varies greatly by region, and waiting lists can be substantial. There is no NHS prescription charge once approved through the service.
Private access: Faster access without NHS waiting lists. You complete an online consultation with a licensed UK prescriber (no GP referral needed), answer health questions, and receive a prescription if suitable. Use our free BMI calculator and GLP-1 weight loss calculator to check your eligibility and project potential outcomes before booking a consultation. Private costs begin at approximately £129/month but offer flexibility in dose selection and timing.
Next steps: Speak to your GP if interested in NHS access, or arrange a private online consultation if you prefer faster access. Either route requires clinical assessment—this is not available over-the-counter.
- 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 available on the NHS?
Yes, Mounjaro (tirzepatide) is approved by NICE for NHS use through specialist weight management services. However, access requires GP referral to tier 3/4 services, and availability and waiting times vary significantly by region. Your GP can advise on local NHS provision.
Why does Mounjaro 5mg cost less than higher doses?
The 5mg dose is typically the first maintenance dose after the initial dose escalation phase. Pricing reflects supply volume and is set by individual pharmacies. Higher doses (10mg, 15mg) usually cost slightly more but often not proportionally so—ask about your specific dose when requesting pricing.
Can I get a cheaper price for Mounjaro 5mg?
Prices vary between providers, so comparing quotes is worthwhile. Some offer subscription discounts for ongoing treatment, bulk purchase reductions, or promotional rates. Always ensure you're using a GPhC-registered pharmacy and a UK-licensed prescriber—avoid unregulated or overseas suppliers.
How does Mounjaro 5mg price compare to Wegovy?
Mounjaro and Wegovy pricing is broadly similar in the UK private market (£129–£200/month depending on dose and provider). Mounjaro is a dual GIP/GLP-1 agonist, while Wegovy is GLP-1-only. Prescriber recommendation may depend on individual clinical factors rather than cost alone.
What happens if I can't afford ongoing Mounjaro 5mg treatment?
If cost is a barrier, explore NHS access through your GP. Some private providers offer payment plans. Weight loss may be sustained through lifestyle changes once you've achieved your goal. Your GP can discuss affordable alternatives or tapering strategies with you.
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.