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 Titration: Cost and Access in the UK
Mounjaro titration is the gradual dose-escalation schedule used to help your body adjust to tirzepatide treatment. If you're considering Mounjaro in the UK, understanding the titration process, associated costs, and how to access it through either NHS or private prescription routes is essential. This guide covers everything you need to know about getting started, from initial consultation through to your maintenance dose, plus realistic costs for private access and what the NHS route involves.
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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.
How Mounjaro Titration Works and What It Costs Privately
Mounjaro titration follows a structured 4-week escalation schedule. You start at 2.5 mg (weeks 1–4), then progress through 5 mg, 7.5 mg, 10 mg, 12.5 mg, and finally 15 mg (maximum dose). Each dose is a once-weekly injection using the convenient Mounjaro KwikPen device. You remain on each dose for a minimum of 4 weeks before increasing, allowing your body to adjust and your prescriber to assess tolerability.
Private prescription costs in the UK typically range from £129 to £320 per month, depending on your dose. Lower doses (2.5–5 mg) cost less; higher doses (10–15 mg) cost more. These costs cover the medication, clinical assessment, and ongoing prescriber support through GPhC-registered online pharmacies. Unlike the NHS, private access does not require a GP referral to specialist weight management services, making it faster for many people.
- Starting dose (2.5 mg): typically £129–£159/month
- Mid-range doses (5–10 mg): typically £179–£249/month
- Higher doses (12.5–15 mg): typically £269–£320/month
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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.
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 to Getting Mounjaro in the UK
NHS route: You must be referred by your GP to a tier 3 specialist weight management service. NICE has approved tirzepatide (Mounjaro) for NHS use, but availability varies significantly by region and ICB (Integrated Care Board). Waiting lists can be months to years in many areas, and not all regions have active weight management services. Once approved, NHS prescriptions are free, but access is the main barrier.
Private route: You book an online consultation with a UK-licensed prescriber. Following assessment, a prescription is issued if appropriate and dispensed by a GPhC-registered pharmacy. This process typically takes days, not months. You'll pay privately but have faster access and no NHS referral needed. Both routes require a clinical assessment—no legitimate prescriber will issue Mounjaro without one.
- 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 is the Mounjaro titration schedule?
Mounjaro titration starts at 2.5 mg and increases every 4 weeks: 2.5 mg → 5 mg → 7.5 mg → 10 mg → 12.5 mg → 15 mg (maximum). Your prescriber may adjust the pace based on your tolerance and response. Each dose is a once-weekly injection using the KwikPen device.
How much does Mounjaro cost in the UK privately?
Private costs range from approximately £129–£320 per month depending on dose. Starting doses cost less; higher maintenance doses cost more. Prices include the medication, clinical assessment, and ongoing prescriber support through GPhC-registered online pharmacies.
Can I get Mounjaro free through the NHS?
Yes, Mounjaro is available through NHS specialist weight management services if you meet eligibility criteria. However, access requires a GP referral and availability varies by region. Waiting lists can be lengthy. NICE has approved tirzepatide for NHS use in eligible adults.
What is the difference between Mounjaro titration and Wegovy titration?
Mounjaro (tirzepatide) starts at 2.5 mg and escalates to 15 mg. Wegovy (semaglutide) starts at 0.25 mg and escalates to 2.4 mg. Mounjaro is a dual GIP/GLP-1 agonist; Wegovy is a GLP-1 agonist only. Both require prescription and clinical assessment.
How long does the Mounjaro titration process take?
Full titration from 2.5 mg to your target maintenance dose typically takes 20 weeks (5 doses × 4 weeks each). Some people stabilise at lower doses like 5 mg or 10 mg. Your prescriber will assess your response and tolerance at each step.
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.