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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Mounjaro Tips And Tricks: Accessing Treatment In The UK
Getting Mounjaro (tirzepatide) in the UK involves understanding your options — both NHS and private routes are available, but they work very differently. This guide covers practical tips for accessing this prescription-only weight management injection, what it costs, and how the process works. Whether you're considering NHS specialist services or private prescribing, knowing what to expect helps you make an informed decision about your weight management options.
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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 Access Routes And Typical UK Costs
In the UK, private access to Mounjaro is available through GPhC-registered online pharmacies following a clinical assessment with a UK-licensed prescriber. Typical costs range from approximately £129 to £320 per month depending on the dose you're prescribed — lower starting doses like 2.5 mg cost less, whilst maintenance doses like 10 mg or 15 mg cost more.
- Online consultation: usually £15–£30 (some providers include this in the medication price)
- Prescription fee: included with the medication price at most private providers
- Medication cost: varies by dose and provider — shop around for the best value
- Repeat prescriptions: typically available monthly with no additional consultation fee once you've had an initial assessment
Private access means you don't need an NHS referral to a specialist weight management service, so you can start treatment much faster — often within days rather than months. However, costs are your responsibility, and you'll need to manage your own GP follow-up if you want NHS support alongside private medication.
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: Access And Timescales
NHS route: Free at the point of use if approved, but requires referral to a tier 3 specialist weight management service from your GP. Waiting times vary dramatically by region — some areas have waits of 12–24 months. Once approved, ongoing monitoring is included.
Private route: Faster access (days to weeks), but you pay upfront. No NHS referral needed. You arrange your own GP follow-up for blood pressure and metabolic monitoring. Use our free GLP-1 weight loss calculator to estimate potential results before you commit, and our BMI calculator to document your starting point for progress tracking.
The right choice depends on your budget, timeline, and local NHS availability. If your area has a functioning specialist service with reasonable waiting times, NHS access is worthwhile. If waiting lists are very long, private prescribing offers faster access to treatment.
- 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 the UK?
Private Mounjaro costs typically range from £129–£320 per month depending on dose. Starting doses (2.5 mg) are cheaper than maintenance doses (10–15 mg). Some online providers include the consultation fee in the medication price. Always compare costs between registered pharmacies — prices vary and shopping around can save money.
Can I get Mounjaro free on the NHS?
Yes, if you're eligible and referred to an NHS tier 3 specialist weight management service by your GP. Eligibility requires a BMI of 30+ or 27–29.9 with weight-related health conditions. However, NHS availability is very limited and waiting lists are often 12–24 months. Ask your GP about your local service.
What happens during an online consultation for private Mounjaro?
A UK-licensed prescriber will ask about your medical history, current medications, BMI, and weight management goals. They'll assess whether tirzepatide is suitable and check for contraindications. If approved, they'll issue a prescription to a GPhC pharmacy. The whole process usually takes 24–48 hours. Expect questions about previous weight loss attempts and any health conditions.
Is the KwikPen prescription included in the cost?
Yes. When you're quoted a price for Mounjaro, this includes the KwikPen device itself. Each pen contains 4 weeks of doses. You don't pay separately for the device. Repeat prescriptions are issued monthly, and you receive a new pen each month as you progress through dose increases.
Can I use my NHS prescription at a private pharmacy?
Yes. If your NHS GP prescribes Mounjaro through a specialist service, you can use that prescription at any GPhC-registered pharmacy — including private ones. However, most NHS-prescribed Mounjaro is dispensed through NHS pharmacies. If you want to use a specific private pharmacy, discuss this with the specialist service.
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.