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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Wegovy Injections for Weight Loss: UK Cost and Access
Wegovy is a once-weekly semaglutide injection licensed in the UK for weight management in adults. It works as a GLP-1 receptor agonist to help reduce appetite and support weight loss alongside diet and exercise. This guide explains how to access Wegovy in the UK, what it costs through private channels, NHS eligibility, and what to expect during an online consultation. Individual results vary significantly.
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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 Wegovy Cost and Prescription Access in the UK
Wegovy is available privately through UK-licensed prescribers and registered pharmacies. Private costs typically range from £150 to £300 per month, depending on your dose and the provider. This covers the clinical assessment, prescription, and the injection itself. Each Wegovy pen contains four weekly doses, so one box lasts approximately four weeks.
To access Wegovy privately, you'll need an online consultation with a UK-licensed GP or healthcare professional. During assessment, they'll review your medical history, current medications, weight, BMI, and any weight-related health conditions. A BMI of 30 or above, or 27–29.9 with qualifying health conditions, typically meets eligibility criteria. Our free BMI calculator can help you check your current BMI. If approved, your prescription is sent to a registered pharmacy for dispensing. The entire process usually takes 2–5 working days from consultation to delivery.
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 Access: What You Need to Know
NHS access is free but involves a referral to a tier 3 specialist weight management service through your GP. Waiting times vary significantly by region—some areas have waits of 6–18 months or longer. NHS access may be restricted based on local criteria and ICB (Integrated Care Board) availability. Private access is faster—typically available within days—but involves out-of-pocket costs starting around £150–£300 monthly. Both routes require a clinical assessment. An online consultation with a private prescriber takes 10–20 minutes and is usually conducted via video or phone. The prescriber will ask about your weight history, diet, exercise habits, medical conditions, and medications to assess suitability. If you're considering GLP-1 treatment, try our weight loss calculator to estimate potential outcomes at different doses.
- 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 Wegovy cost in the UK privately?
Private Wegovy costs typically range from £150 to £300 per month depending on your dose and provider. This includes the online clinical assessment and prescription. Each box contains four weekly doses, lasting about one month. Costs may vary between providers, so it's worth checking current pricing before consultation.
Can I get Wegovy on the NHS in the UK?
Yes, Wegovy can be prescribed on the NHS through specialist tier 3 weight management services. You'll need a GP referral and typically meet criteria of BMI 30+ (or 27–29.9 with weight-related health conditions). However, NHS waiting times are often lengthy—6–18 months or longer depending on your region and local ICB availability.
What happens during a private Wegovy consultation?
An online consultation with a UK prescriber takes 10–20 minutes via video or phone. They'll review your medical history, current weight, BMI, medications, and any weight-related conditions like diabetes or high blood pressure. They'll assess whether Wegovy is suitable for you. If approved, your prescription is sent to a registered pharmacy within 1–2 working days.
What's the difference between Wegovy and Mounjaro for weight loss?
Both are prescription weight loss injections used weekly. Wegovy (semaglutide) is a GLP-1 receptor agonist; Mounjaro (tirzepatide) is a dual GIP and GLP-1 agonist. Clinical trials show similar average weight loss (around 15% body weight), though individual results vary. Cost and availability may differ—your prescriber will assess which is more appropriate for you.
Do I need a UK prescription to get Wegovy?
Yes, Wegovy is prescription-only in the UK. You must have a valid prescription from a UK-licensed doctor or healthcare professional before any registered pharmacy can dispense it. Private online prescribers issue prescriptions following a clinical consultation if you meet eligibility criteria.
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.