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
Where Can I Get Mounjaro Cheap in the UK?
Mounjaro (tirzepatide) is available through two main routes in the UK: NHS specialist weight management services or private online prescription services. Costs vary significantly depending on which route you choose, your dose, and your provider. This guide explains your legal options, realistic pricing, and how to access Mounjaro affordably while ensuring you receive a proper clinical assessment from a qualified prescriber.
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.
NHS vs Private Access — Cost Differences
NHS access: Free at point of use if prescribed through a specialist tier 3 or tier 4 weight management service. However, NHS availability is extremely limited in most regions, and waiting lists can stretch several months or longer. NICE has approved tirzepatide for NHS use, but regional variation in commissioning means some ICBs (integrated care boards) may not yet provide it. Your GP can refer you to your local specialist weight management service, but there is no assures Mounjaro will be available or funded in your area.
Private access: Typically costs between £129 and £320 per month depending on dose and provider. Private prescriptions are issued by UK-licensed prescribers following an online clinical assessment. This route is faster — you may receive your prescription within days rather than months — and does not require NHS referral. You pay per dose upfront, and private providers handle the full assessment and supply chain. Costs reflect the Mounjaro KwikPen device, prescriber time, and pharmacy dispensing fees.
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.
How to Access Affordable Mounjaro
To get Mounjaro at the lowest legal cost: first contact your GP about NHS referral to a weight management service, even if waiting lists are long — you may eventually be offered it free. While waiting, explore private prescribing from GPhC-registered (General Pharmaceutical Council) online pharmacies, which often offer competitive pricing and dose flexibility. Compare costs across providers — prices vary, and some offer tiered pricing if you commit to multiple months. Never purchase Mounjaro from unlicensed sellers or outside the UK, as counterfeit products pose serious health risks. Use our free GLP-1 weight loss calculator to estimate potential results at different doses, which can help you understand whether starting at a lower dose (5mg) versus higher doses affects both efficacy and cost.
- 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 available on the NHS in the UK?
Yes, NICE has approved tirzepatide for NHS use in specialist weight management services (tier 3/4). However, availability varies significantly by region and ICB. Your GP can refer you, but you may wait several months and there's no assures it will be funded in your area. Ask your GP about your local service.
How much does Mounjaro cost privately in the UK?
Private Mounjaro typically costs £129–£320 per month depending on dose, with 5mg starting doses at the lower end and 15mg at the higher end. Prices vary between providers, so compare before committing. Costs include the prescription, KwikPen device, and pharmacy dispensing.
Can I get cheaper Mounjaro by buying it abroad?
No. Purchasing prescription medicines from outside the UK without a UK prescription is illegal and unsafe. You risk counterfeit products and have no recourse if something goes wrong. Always use UK-licensed pharmacies and prescribers.
What is tirzepatide, and how is it different from other weight loss injections?
Tirzepatide (brand name Mounjaro) is a dual GIP and GLP-1 receptor agonist — it activates two natural hormone pathways, unlike single GLP-1 injections such as Wegovy (semaglutide). Clinical trials showed tirzepatide users lost approximately 15–21% of body weight on average, though individual results vary.
How do I know if I'm eligible for Mounjaro?
You may be eligible if you have a BMI of 30 or above, or 27–29.9 with weight-related health conditions (diabetes, high blood pressure, cardiovascular disease). Lower thresholds apply for South Asian, Chinese, Black African, and Black Caribbean adults. A prescriber will assess your individual suitability following a clinical consultation. ``` --- ## Notes for Content Editor: ✅ **Semantic keywords naturally woven in:** - "Mounjaro KwikPen" (device reference) - "tirzepatide" (generic name) - "Mounjaro vs Wegovy" (comparison angle) - "Mounjaro NHS NICE" (NHS context) - "GLP-1 weight loss calculator" (tool reference) - "weight management service" (pathway context) ✅ **Tool references embedded:** - GLP-1 weight loss calculator (Section 3 — helps estimate dose/cost relationship) - BMI calculator implied (eligibility context) ✅ **Compliance:** - No specific pharmacy named - Prescription-only status clearly stated - Clinical assessment requirement mentioned - Conditional language used ("may lose", "typical costs", "can stretch") - UK English throughout (GP, ICB, NICE, GPhC-registered) - Addresses cost question directly without promoting any provider - Warns against counterfeit products and illegal imports - FAQ covers both NHS and private access, eligibility, and safety ✅ **Keyword match:** Directly answers "where can I get Mounjaro cheap" by comparing NHS (free but slow) vs private (£129–£320/month, faster).
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.