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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Travel With Mounjaro — UK Storage and Access Guide
Travelling with Mounjaro requires careful planning around storage, prescription access, and logistics. Whether you're taking a short trip within the UK or planning international travel, understanding how to store your KwikPen safely, where to access prescriptions while away, and the difference between NHS and private routes will help ensure your weight management treatment continues smoothly. This guide covers everything you need to know about managing Mounjaro whilst travelling in the UK context.
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Calculate Your BMI Instantly
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.
UK Prescription Access and Private Routes for Mounjaro
NHS access to Mounjaro is through specialist tier 3 weight management services following GP referral. However, NHS availability varies significantly by region and waiting times can extend several months. For continuity during travel, if you're already receiving Mounjaro through the NHS, contact your specialist service before departing to arrange prescription support whilst away.
Private prescription access is available through GPhC-registered online pharmacies following a clinical assessment with a UK-licensed prescriber. This route offers flexibility — you can obtain your prescription without regional waiting lists or NHS referral requirements. The consultation is conducted online, typically taking 24–48 hours for assessment and prescription issuance. Many private providers offer delivery to UK addresses, making it straightforward to receive your Mounjaro KwikPen before travel or arrange delivery to your destination within the UK. Costs typically range from £129–£320 monthly depending on your dose, and you have flexibility to pause or restart treatment as needed.
- Private route: faster access, no NHS referral needed, flexible scheduling
- NHS route: available through specialist services if already established patient
- Contact your prescriber before travel to confirm supply and delivery options
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.
Storage Guidelines and Travel Logistics
Storage is critical when travelling. Unopened Mounjaro KwikPens must be refrigerated at 2–8°C — do not freeze. Once opened, a pen can be stored at room temperature (below 30°C) for up to 30 days. For travel within the UK, pack your pens in a cool bag with ice packs if travelling in warm weather, or use a travel cooler designed for medications. Keep pens in their original carton away from direct sunlight. If you're travelling abroad, check the destination country's regulations on bringing prescription medicines — some countries restrict GLP-1 medications. Always carry your prescription or a letter from your GP/prescriber confirming the medication is prescribed to you. Using our GLP-1 weight loss calculator can help you plan your dose schedule around travel dates if adjustments are needed.
- 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 store Mounjaro in a normal travel bag?
No — unopened pens require refrigeration at 2–8°C. Use an insulated cool bag with ice packs for journeys. Once opened, a pen tolerates room temperature (below 30°C) for up to 30 days, but it's safest to keep it cool during travel. Never expose to direct heat or sunlight.
What if I miss a dose whilst travelling?
If you miss your injection within 4 days, take it as soon as you remember and continue your normal schedule. If it's been more than 4 days, skip that dose and resume on your usual day. Ensure you have enough pens for your trip plus one spare — contact your prescriber before departure to arrange delivery if needed.
Can I get Mounjaro prescribed abroad and bring it back to the UK?
Medications prescribed abroad may not be recognised by UK pharmacies or GPs. For continuity, arrange your UK prescription before travel through your NHS service or a private prescriber. This ensures your treatment continues without gaps and avoids customs or import issues.
How do I access Mounjaro if I'm already on the NHS and travelling?
Contact your specialist weight management service at least 2–4 weeks before travel. They can arrange prescription support, advise on storage during your trip, and confirm whether your prescriptions can be dispensed whilst away. Some NHS areas have reciprocal arrangements; others may refer you to private access temporarily.
What dose should I use if my travel dates don't align with my injection schedule?
Do not adjust your dose without medical guidance. Speak to your prescriber or GP before travel if your schedule shifts. Your prescriber may advise delaying or advancing your injection slightly, but this decision must be made clinically based on your specific circumstances and treatment plan.
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.