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 and Apixaban: Cost and Access in the UK
If you're taking apixaban (a blood thinner) and considering Mounjaro for weight management, you'll need to understand how these medications interact and what your access and cost options are in the UK. Mounjaro is a prescription-only weight management injection, and combining it with apixaban requires careful medical assessment. This guide covers private prescription costs by dose, NHS access routes, and what to expect when managing both medications.
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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 Mounjaro Prescription Costs by Dose
Private prescription costs for Mounjaro KwikPen vary depending on the dose and provider. Lower doses (2.5–5 mg) typically cost £129–£149 per month for a 4-week supply. Mid-range doses (7.5–10 mg) generally range from £159–£189 per month. Higher doses (12.5–15 mg) usually cost £199–£320+ per month, depending on the private prescriber and pharmacy. These are approximate figures and can vary between providers. Mounjaro dose titration means you'll start at 2.5 mg and increase every 4 weeks if needed, so your initial cost will be lower than maximum-dose pricing. When taking apixaban alongside Mounjaro, your prescriber will assess both medications during the clinical consultation to ensure safe co-prescribing, as Mounjaro may affect how quickly oral medications are absorbed.
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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 Routes: What to Expect
NHS route: Access to Mounjaro through the NHS is via specialist tier 3 weight management services, requiring GP referral. NICE has approved tirzepatide for NHS use, but availability depends on your ICB (Integrated Care Board) region and waiting lists can be lengthy—often many months to over a year in some areas. If you're already taking apixaban for cardiovascular health, this strengthens your eligibility case for NHS support. Private route: Online private prescribers can assess you without NHS referral and issue a prescription for dispensing by a GPhC-registered pharmacy. The full process typically takes 1–2 weeks. You'll need to disclose your apixaban use in the private clinical assessment, as your prescriber must confirm no contraindications exist before issuing your Mounjaro prescription. Private access offers faster treatment initiation compared to NHS routes.
- 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 take Mounjaro with apixaban?
Mounjaro and apixaban can be taken together, but your prescriber must assess both medications. Apixaban is not a direct contraindication to Mounjaro, however Mounjaro may slow gastric emptying and affect how quickly oral medications (including apixaban) are absorbed. Always inform your prescriber or GP that you're taking apixaban before starting Mounjaro. Individual circumstances vary, so clinical assessment is essential.
What does Mounjaro cost on the NHS?
Mounjaro is not routinely funded by all NHS services. Access is through specialist tier 3 weight management services via GP referral. NICE has approved tirzepatide, but regional availability and funding vary significantly. Waiting lists can be very long. Contact your local ICB or specialist weight management service to check funding status in your area.
How much does a private Mounjaro prescription cost?
Private Mounjaro typically costs £129–£149/month for lower doses (2.5–5 mg), £159–£189 for mid-range (7.5–10 mg), and £199–£320+ for higher doses (12.5–15 mg). Costs vary between providers. You'll also pay for the private clinical assessment (usually £40–£80). Prices can change, so check current rates with your chosen provider.
Will Mounjaro interact with my apixaban?
Mounjaro may affect the absorption of apixaban because it slows how quickly food (and medications) leave your stomach. This doesn't necessarily mean you can't take both, but your prescriber needs to know you're on apixaban. They may recommend taking apixaban at a different time of day, or your GP may need to monitor your blood clotting more closely. Always declare all medications during consultation.
How do I access Mounjaro privately if I'm taking apixaban?
Use an online private prescriber registered in the UK. During your consultation, declare that you're taking apixaban. The prescriber will assess whether Mounjaro is safe for you given your blood clotting medication. If approved, they'll issue a prescription to a GPhC-registered pharmacy. The whole process typically takes 1–2 weeks from consultation to delivery of your first Mounjaro KwikPen.
Ready to take control of your weight loss journey?
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