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 Questionnaire: UK Access, Cost & Assessment
A Mounjaro questionnaire is a health assessment required before prescription in the UK. Whether accessing through NHS specialist services or private online prescribing, you'll complete a clinical questionnaire to check eligibility based on your BMI, medical history, and weight-related health conditions. This guide explains what to expect, how much Mounjaro costs in the UK, and the differences between NHS and private access routes.
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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.
Private Prescription Costs & Online Assessment in the UK
Mounjaro is available through private online prescribing in the UK following a digital health questionnaire completed with a UK-licensed prescriber. Private Mounjaro costs typically range from £129 to £320 per month, depending on the dose and pharmacy. The 2.5mg starter dose is usually the least expensive, with costs increasing as you progress through dose titration to the maximum 15mg weekly injection.
- Online consultations typically cost £15–£50, though some providers include this in the overall medication cost
- Each KwikPen contains 4 weeks of doses and must be ordered monthly
- Prices vary between different GPhC-registered online pharmacies, so shopping around is worthwhile
- Private prescriptions require a new assessment each time, or annual check-ins depending on the prescriber's policy
The questionnaire asks about your weight, height, medical history, current medications, and any weight-related health conditions such as type 2 diabetes or high blood pressure. This helps the prescriber assess whether tirzepatide is suitable for you personally.
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: Routes & Timelines
The NHS route involves referral from your GP to a specialist tier 3 or tier 4 weight management service. NICE has approved tirzepatide for NHS use, but availability varies significantly by region and waiting lists can be lengthy—often several months to over a year in some areas. There is no cost at the point of use if prescribed through the NHS, but access depends on local commissioning and service capacity.
The private route is faster: complete an online questionnaire, receive a prescription within hours or days if approved, and collect from a pharmacy. However, you pay the full cost. Your GP cannot refer you for private Mounjaro—you arrange it independently. Both routes require clinical assessment; neither offers prescriptions without a proper health check.
The NHS route involves referral from your GP to a specialist tier 3 or tier 4 weight management service. NICE has approved tirzepatide for NHS use, but availability varies significantly by region and waiting lists can be lengthy—often several months to over a year in some areas. There is no cost at the point of use if prescribed through the NHS, but access depends on local commissioning and service capacity.
The private route is faster: complete an online questionnaire, receive a prescription within hours or days if approved, and collect from a pharmacy. However, you pay the full cost. Your GP cannot refer you for private Mounjaro—you arrange it independently. Both routes require clinical assessment; neither offers prescriptions without a proper health check. Use our free BMI calculator above to check your starting point and understand your eligibility based on BMI thresholds.
- 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.
What questions will a Mounjaro health questionnaire ask?
A standard questionnaire covers: current weight and height (to calculate BMI), medical history including type 2 diabetes or prediabetes, cardiovascular conditions, blood pressure, current medications, allergies, whether you are pregnant or breastfeeding, and any previous weight loss treatments. This helps the prescriber assess suitability and safety.
How much does private Mounjaro cost in the UK per month?
Private Mounjaro typically costs £129–£320 per month depending on dose. Starting doses (2.5–5mg) are usually cheaper; maximum dose (15mg) is most expensive. Prices vary between pharmacies. You pay for each month's supply separately. NHS prescriptions are free but involve waiting lists and regional availability.
How long does the online questionnaire process take?
Most online consultations take 10–20 minutes to complete. After submission, a UK-licensed prescriber reviews your answers, typically within 24–48 hours. If approved, your prescription is issued and you can collect from a pharmacy within 1–2 working days. NHS referrals take much longer—weeks to months for initial appointment.
What BMI do I need to qualify for Mounjaro in the UK?
You generally need a BMI of 30 or above, or 27–29.9 with a weight-related health condition (type 2 diabetes, high blood pressure, cardiovascular disease, sleep apnoea). Adults of South Asian, Chinese, Black African, or Black Caribbean heritage may qualify at lower BMI thresholds (from 27.5). Ask your prescriber about your personal eligibility.
Is a Mounjaro questionnaire the same as a prescription?
No. A questionnaire is the first step—a health assessment. If you pass the clinical check, a prescriber issues a prescription. You then take the prescription to a GPhC-registered pharmacy to collect the actual medication. Without passing the questionnaire assessment, no prescription is issued. Every prescriber conducts this check independently. ```
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