The UK's most complete GLP-1 guide
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- 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 5th Dose Syringe — UK Cost & Access
The fifth dose of Mounjaro marks the transition to the maximum 15mg maintenance dose — but what does a 5th syringe cost in the UK, and how do you access it? Whether you're considering Mounjaro through the NHS or via private prescription, understanding costs and eligibility is essential. This guide explains your options, the typical pricing structure for ongoing treatment, and what to expect at each stage of your prescription journey.
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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.
Mounjaro 5th Dose Cost and Private Prescription Access in the UK
A Mounjaro KwikPen containing the 5th dose (15mg) typically costs between £180 and £250 when prescribed privately, depending on your provider. This is the maintenance dose used for ongoing treatment after the dose titration schedule. Each KwikPen contains four pre-filled syringes, so one pen covers four weeks of weekly injections.
Private prescription costs vary across UK providers because consultation fees and pharmacy mark-ups differ. When budgeting for long-term tirzepatide treatment, factor in:
- Online consultation fee (typically £20–£50)
- Prescription cost at chosen pharmacy (£180–£250 per pen)
- Repeat prescription frequency (monthly or quarterly)
- Potential GP letter requirement (small additional cost)
Many private providers offer subscription or bulk-purchase discounts for recurring orders, making longer-term treatment more affordable. Our GLP-1 weight loss calculator can help you estimate potential outcomes at the 15mg maintenance dose, supporting your decision-making.
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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.
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NHS Access vs Private Route — What's Available to You
NHS route: Mounjaro is available through NHS specialist tier 3/4 weight management services, but access is limited and varies significantly by region (ICB). Waiting lists can exceed 12 months in many areas, and only patients meeting strict BMI and comorbidity criteria are eligible. NHS prescription would be free at the point of use once approved.
Private route: Faster access — typically within days to weeks. You complete an online clinical assessment with a UK-licensed prescriber, receive a prescription if clinically appropriate, and order from a GPhC-registered pharmacy. No NHS referral needed. Costs are out-of-pocket but offer flexibility and choice of dose.
Check your local ICB commissioning policy and waiting times before deciding. Use our BMI calculator to confirm your eligibility baseline first.
To access a 5th dose Mounjaro syringe privately, you'll need an active prescription from a UK-licensed prescriber. Most require an online consultation (typically 10–15 minutes) assessing your medical history, current medications, and weight loss progress. You'll answer questions about previous side effects, whether you're taking oral contraceptives, and any changes in your health.
Once approved, the prescription is sent electronically to a GPhC-registered pharmacy, which dispenses and ships your KwikPen. Delivery typically takes 2–5 working days. Many providers offer repeat prescription systems so you can reorder the same dose monthly without another consultation (though periodic health reviews are recommended).
- 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 at the 15mg dose?
Mounjaro is available through NHS specialist weight management services for eligible adults, but availability varies widely by region and waiting lists are often very long (12+ months in many areas). You must meet BMI and comorbidity criteria and be referred through your GP to a tier 3/4 service. Once initiated on the NHS, all doses including 15mg would be free.
How much does a 5th dose Mounjaro KwikPen cost privately?
A private prescription for Mounjaro 15mg KwikPen typically costs £180–£250 per pen in the UK. This price varies between providers depending on consultation fees and pharmacy pricing. Each pen contains four pre-filled syringes (four weeks' worth of weekly injections).
Do I need a GP referral to get a private Mounjaro prescription?
No. Private prescription weight loss treatment does not require NHS referral. You can access Mounjaro through a private online consultation with a UK-licensed prescriber without involving your GP, though informing your GP is good practice for continuity of care.
What's the difference between Mounjaro and Wegovy for cost and access?
Both require prescription and clinical assessment. Mounjaro (tirzepatide, once-weekly) typically costs £180–£250 per dose; Wegovy (semaglutide, once-weekly) costs similar amounts. NHS access is limited for both. Private access is faster for both but varies by provider and region.
Can I get repeat prescriptions for Mounjaro without a new consultation each time?
Many private providers offer repeat prescription systems after an initial consultation, allowing monthly reorders of the same dose without a new appointment. However, periodic health reviews (typically every 3–6 months) are recommended to monitor progress and any side effects before continuing treatment.
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.