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 to Access Mounjaro in Belfast
Mounjaro (tirzepatide) is available in Belfast through both NHS specialist services and private online prescribing routes. This guide explains how to access it, what it costs, and what eligibility criteria apply. Whether you're exploring NHS options or private prescription routes, understanding the different pathways will help you make an informed decision about treatment. Calculate your BMI using our free calculator above to check your initial eligibility.
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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.
Private Mounjaro Access and Costs in Belfast
In the UK, including Belfast, Mounjaro is available through GPhC-registered online prescribing services without needing an NHS referral. Private access typically involves an online consultation with a UK-licensed prescriber, followed by prescription dispensing through a registered pharmacy.
- Typical costs range from £129 to £320 per month depending on your dose (2.5 mg to 15 mg)
- Doses are escalated gradually every 4 weeks, so your cost may increase as treatment progresses
- Payment is usually per injection pen (4 weeks supply)
- Private treatment requires a clinical assessment before prescription — your medical history, medications, and weight loss goals will be reviewed
- Delivery typically takes 3–7 working days
The Mounjaro KwikPen requires refrigeration (2–8°C) until use, then can be stored at room temperature for up to 30 days after first use.
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 Routes in Belfast
NHS access in Belfast is through specialist tier 3 weight management services via your GP. Your GP must refer you; you cannot self-refer. NHS provision in Northern Ireland varies, and waiting lists can be several months. Once referred, a consultant will assess your eligibility based on BMI and weight-related health conditions.
Private access is typically faster — you can start an online consultation today and receive your first prescription within days, provided clinical assessment approves it. However, private treatment is not funded by the NHS, so you pay the full cost.
Use our free weight loss calculator to estimate potential Mounjaro results at different doses, helping you decide which route suits your timeline and budget.
- 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.
How much does Mounjaro cost privately in Belfast?
Private Mounjaro costs typically range from £129 to £320 per month depending on your dose. Starting doses (2.5 mg) are usually around £129–£180, with maximum doses (15 mg) around £280–£320. Costs may vary slightly between providers. Each pen contains 4 weekly injections.
Can I access Mounjaro through the NHS in Belfast?
Yes, but only through a specialist weight management service. Your GP must refer you to a tier 3 service in Northern Ireland. Waiting lists are often lengthy (months). You must meet eligibility criteria: BMI ≥30 or BMI 27–29.9 with weight-related health conditions like diabetes or hypertension.
What happens during a private Mounjaro consultation?
You'll complete an online health assessment covering medical history, current medications, allergies, and weight loss goals. A UK-licensed prescriber reviews your information and decides if Mounjaro is suitable. If approved, a prescription is issued to a registered pharmacy for dispensing. This typically takes 24–48 hours.
What's the difference between Mounjaro and Wegovy?
Mounjaro (tirzepatide) is a dual GIP and GLP-1 receptor agonist, while Wegovy (semaglutide) is a GLP-1 agonist only. Clinical trials showed Mounjaro achieved approximately 15–21% average weight loss, compared to Wegovy's approximately 15% average. Both require prescriptions and both cost similarly. Your prescriber can advise which suits you.
Do I need a prescription to buy Mounjaro?
Yes, Mounjaro is prescription-only in the UK. You cannot buy it over the counter or without a clinical assessment. Whether accessing through NHS or private routes, a licensed UK prescriber must assess your eligibility and issue a prescription before any pharmacy can dispense it.
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.