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 Weight Loss Price in the UK
Wegovy (semaglutide) is a prescription-only weight loss injection licensed in the UK, but cost and access vary significantly depending on whether you pursue NHS or private options. Understanding the price range, eligibility requirements, and how to access this weekly weight loss injection is essential before starting treatment. This guide explains everything you need to know about Wegovy pricing and access routes in the UK.
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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.
Wegovy Cost in the UK: NHS vs Private
NHS Access: Wegovy is available through NHS specialist weight management services, but access is strictly limited. You must be referred by your GP to a tier 3 or tier 4 weight management clinic. These services are not universally available, and waiting lists can extend from months to over a year in many regions. NHS prescriptions are free once approved, but availability depends on your local integrated care board (ICB) budget and commissioning decisions.
Private Prescription Cost: Private online prescribing provides faster access without NHS referral. A monthly supply typically costs between £129 and £320, depending on your dose and the provider. Starting doses (0.25–0.5 mg) are usually at the lower end of this range, while the maximum dose (2.4 mg) may cost more. Your prescriber will assess your semaglutide eligibility before issuing a prescription following an online clinical assessment.
- Month 1–2 (starter doses 0.25–0.5 mg): approximately £129–£160
- Month 3–4 (escalation to 1–1.7 mg): approximately £180–£240
- Month 5+ (maintenance at 2.4 mg): approximately £240–£320
These are approximate costs and vary by provider. Some private providers offer discounts for upfront payment of multiple months' supply.
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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: Which Route is Right for You?
The NHS route is free but involves a referral from your GP and assessment by a specialist team. You'll need a BMI of 30 or above (or 27+ with weight-related health conditions like type 2 diabetes) and must live in an area where the service is commissioned. Use our free BMI calculator above to check your current BMI and understand your eligibility context.
The private route is faster and does not require NHS referral. You'll complete an online consultation with a UK-licensed prescriber, provide health information, and receive a prescription if clinically appropriate. Private providers typically issue prescriptions within 24–48 hours. This weekly weight loss injection works alongside diet and exercise, not instead of them. Try our GLP-1 weight loss calculator to estimate potential results at different doses and understand what to expect from semaglutide 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 Wegovy cost on the NHS in the UK?
Wegovy is free on the NHS once prescribed through a specialist weight management service. However, access requires GP referral and assessment by a tier 3 or 4 clinic. Availability varies by region and waiting lists can be lengthy.
What is the typical cost of private Wegovy prescription in the UK?
Private Wegovy costs typically range from £129 to £320 per month depending on dose. Starting doses (0.25–0.5 mg) cost less; the maximum dose (2.4 mg) costs more. Prices vary between providers and may include discounts for multiple-month payments.
How long does it take to access Wegovy privately in the UK?
Private online prescribing is usually faster. After completing an online consultation with a UK-licensed prescriber, you'll typically receive a prescription within 24–48 hours if clinically appropriate. The prescription is then dispensed by a GPhC-registered pharmacy.
What is the difference between Wegovy and Mounjaro pricing in the UK?
Both are available privately at similar price ranges (£129–£320 monthly depending on dose). However, Mounjaro is a dual GIP/GLP-1 injection while Wegovy is a GLP-1-only semaglutide injection. Individual clinical suitability and prescriber recommendation determine which is appropriate for you.
Do I need a prescription to buy Wegovy in the UK?
Yes, Wegovy is prescription-only in the UK. You cannot purchase it without a valid prescription from a UK-licensed prescriber. Private prescribing requires an online clinical assessment; NHS prescribing requires GP referral and specialist assessment.
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.