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 to Get a Mounjaro Online Prescription in the UK
Mounjaro (tirzepatide) is a prescription-only weight management injection available online in the UK through licensed private prescribers. Unlike NHS referral routes which can involve lengthy waiting lists, online prescription services assess your eligibility following a digital consultation. If approved, your prescription is dispensed by a registered UK pharmacy. This guide explains how the process works, who's eligible, and what to expect when getting Mounjaro online.
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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.
How Online Mounjaro Prescriptions Work in the UK
Getting a Mounjaro prescription online involves a straightforward process through private healthcare providers. You complete an online health questionnaire covering your medical history, current medications, weight, height, and health conditions. A UK-licensed prescriber reviews your answers and assesses whether tirzepatide is suitable for you based on eligibility criteria and safety considerations. If approved, a prescription is issued and sent to a GPhC-registered pharmacy, which then dispenses your KwikPen and posts it to your address. The entire process typically takes 2–5 working days from consultation to delivery. All prescribers must be UK-licensed and follow GMC or NMC standards. Costs vary by dose and provider, ranging from approximately £129–£320 per month, and are paid privately — this is not available through NHS prescription.
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.
Who Is Eligible for an Online Mounjaro Prescription?
You may be eligible for an online Mounjaro prescription if you have a BMI of 30 or above, or a BMI of 27–29.9 with a weight-related health condition such as type 2 diabetes, prediabetes, high blood pressure, abnormal blood fats, sleep apnoea, or a history of cardiovascular disease. If you're of South Asian, Chinese, Black African, or Black Caribbean heritage, lower BMI thresholds may apply — eligibility may start at BMI 27.5 or above. You must be 18 or older and not pregnant, planning pregnancy, or breastfeeding. Use our free BMI calculator above to check your current BMI instantly, and our GLP-1 weight loss calculator to explore potential outcomes. A prescriber will assess your complete health profile during consultation — not all eligible patients will be approved.
- 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.
Can I get Mounjaro on the NHS online?
No. Mounjaro on the NHS is only available through specialist tier 3/4 weight management services following a GP referral to your local integrated care board. You cannot get an NHS prescription online. Private online prescribing is separate from NHS services and requires payment.
What information do I need for an online Mounjaro consultation?
You'll need your current weight, height, medical history, list of any medications you're taking, details of weight-related health conditions (if applicable), and emergency contact information. Have these ready before starting your online consultation for the fastest process.
How long does it take to get Mounjaro delivered after an online prescription?
The consultation-to-delivery process typically takes 2–5 working days. Once approved, the pharmacy dispenses your KwikPen and posts it via standard delivery. Delivery time varies by location but is usually within 3–5 working days of dispatch.
What is the cost of getting Mounjaro online in the UK?
Costs vary by dose and provider. Expect to pay approximately £129–£200 for lower doses (2.5–7.5 mg) and £250–£320 for maintenance doses (10–15 mg) per month. Some providers offer package discounts for multiple months. Prices are not covered by the NHS when prescribed privately.
Is an online Mounjaro prescription the same as an NHS prescription?
No. Online prescriptions are private and require direct payment. NHS prescriptions are free at point of use (standard NHS prescription charge applies in England). Online prescriptions are issued by private prescribers; NHS prescriptions come through tier 3 specialist services. Both are legally valid UK prescriptions if issued by a licensed prescriber.
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.