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 Discount Codes and Second Order Pricing in the UK
If you're considering Mounjaro (tirzepatide) for weight management in the UK, understanding pricing and discount options for second orders is important. Mounjaro is a prescription-only medicine available through NHS specialist weight management services or private prescribers. This guide explains how costs work, where discounts may apply, and what to expect when reordering your KwikPen injections.
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.
How Mounjaro Costs Work and NHS vs Private Access
Mounjaro is a prescription-only weight management injection available in two ways in the UK: through NHS tier 3 specialist services or via private prescribing routes.
NHS Route: If you access Mounjaro through an NHS specialist weight management service, there is no direct cost per dose—you pay standard NHS prescription charges (currently £9.90 per item in England, or free if eligible). NHS prescribing is based on MHRA approval and NICE guidance, and availability depends on your regional ICB (integrated care board).
Private Route: Through private UK-licensed prescribers and GPhC-registered pharmacies, Mounjaro costs vary by dose and provider, typically ranging from £129–£320+ per month. Some private providers offer loyalty discounts or repeat order reductions, though there is no official "Mounjaro discount code" in the traditional retail sense. Always check individual pharmacy pricing when ordering your second dose, as some may offer reduced rates for established patients.
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.
Second Order Pricing and Where to Look for Better Rates
When reordering Mounjaro for a second supply, your costs depend entirely on your access route. If you're on NHS tirzepatide, reorders follow the same NHS prescription charging rules. If you're accessing Mounjaro privately, contact your original prescriber or pharmacy directly—many private services do offer loyalty discounts or slightly reduced pricing for returning customers, though this varies. Compare pricing across different GPhC-registered online pharmacies, as rates fluctuate and some providers offer better value for bulk orders. Always verify the prescriber is UK-licensed and the pharmacy is GPhC-registered before ordering. Use our free GLP-1 weight loss calculator above to help you understand which dose you might be prescribed, as higher doses (10mg, 15mg) may have different pricing structures.
- 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.
Are there official Mounjaro discount codes available in the UK?
There is no official manufacturer discount code for Mounjaro in the UK. However, private prescribing services and pharmacies may offer loyalty discounts or reduced rates for second and subsequent orders. Always ask your pharmacy about repeat customer pricing when ordering your next supply.
How much does Mounjaro cost on the NHS?
On the NHS, Mounjaro is dispensed as a prescription item. In England, you pay the standard prescription charge (£9.90 per item) unless you're exempt. Scotland, Wales, and Northern Ireland have different arrangements. Contact your NHS specialist weight management service for details specific to your region.
Can I get a cheaper price on my second Mounjaro order?
Private pharmacies sometimes offer reduced rates for repeat orders or loyalty discounts. It's worth asking your original pharmacy or comparing prices across different GPhC-registered providers. NHS prescriptions follow standard charging, which doesn't change between orders unless your eligibility status changes.
What's the difference between NHS and private Mounjaro pricing?
NHS prescriptions cost £9.90 per item in England (or are free if eligible). Private tirzepatide typically costs £129–£320+ per month depending on your dose and provider. Private offers flexibility but higher upfront cost; NHS is cheaper but may have longer waiting times and regional availability varies.
Is tirzepatide cheaper than Mounjaro, or are they the same?
Tirzepatide is the active ingredient in Mounjaro—they are the same medicine. The brand name "Mounjaro" is used in the UK for the licensed weight management version. Pricing depends on your access route (NHS vs private), not the name used.
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.