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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Understanding Mounjaro Bundle Deals in the UK
Mounjaro (tirzepatide) bundle deals refer to discounted multi-month packages offered by private UK prescribing services. These are designed to reduce the cost of ongoing treatment by purchasing several months of KwikPen injections upfront. However, it's important to understand how tirzepatide works, what eligibility looks like, and whether bundled pricing represents genuine savings before committing to treatment. Let's explore what you need to know.
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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 Bundle Deals Work in the UK
Mounjaro bundle deals typically allow patients to purchase 2, 3, or 6-month supplies of tirzepatide at a reduced per-dose cost compared to monthly purchasing. Most private UK prescribing services offer these bundled packages to encourage long-term commitment. Each KwikPen contains four weekly doses, so a 3-month bundle would contain 12 pens (three sets of four injections).
Key points about bundles:
- Upfront payment required — you pay the full amount before treatment begins
- Lower monthly cost — bundled pricing typically reduces per-dose expense by 10–20%
- Prescription still required — each bundle requires a separate clinical assessment and UK prescriber authorisation
- Storage considerations — Mounjaro must be refrigerated at 2–8°C when unopened, so storage capacity matters for larger bundles
- Dose escalation built in — bundles account for the standard 4-week escalation schedule (2.5 mg → 5 mg → 7.5 mg → 10 mg, etc.)
Unlike the NHS route — where tirzepatide is accessed through specialist tier 3 weight management services — private bundles offer faster access without waiting lists.
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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.
Eligibility and What Bundles Don't Include
To be eligible for Mounjaro bundles, you must meet UK prescribing criteria: BMI of 30 or above, or BMI of 27–29.9 with weight-related health conditions (type 2 diabetes, high blood pressure, sleep apnoea, cardiovascular disease). For South Asian, Chinese, Black African, or Black Caribbean adults, lower thresholds may apply (BMI 27.5+).
Important clarifications: bundles cover medication costs only — they do not include GP support, blood pressure monitoring, or ongoing clinical review. Many patients find it helpful to use our GLP-1 weight loss calculator to understand projected outcomes before purchasing, and our BMI calculator to confirm eligibility. You'll still need to maintain contact with your prescriber throughout treatment, particularly during dose escalation phases.
- 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.
Are Mounjaro bundle deals actually cheaper than paying monthly?
Yes, typically. Bundle deals usually reduce per-dose cost by 10–20% compared to purchasing single months. For example, a 3-month bundle at reduced pricing may cost less per KwikPen than buying monthly. However, you must pay the full amount upfront, which may not suit all budgets. Compare the per-dose cost offered by different services before committing.
What happens if I want to stop treatment mid-bundle?
Most private services do not offer refunds if you stop treatment early. This is a key consideration — bundles lock you into payment regardless of how treatment progresses. Check the terms and conditions of any service before purchasing. Some services may allow dose pauses or adjustments without forfeiting remaining months.
Do bundle deals include GP support or monitoring?
No. Bundles cover medication cost only. You are responsible for arranging any GP check-ups, blood pressure monitoring, or blood tests yourself. Many patients work with their own GP for ongoing health monitoring while using a private prescribing service for tirzepatide supply. This arrangement works well but requires coordination.
Is Mounjaro the same as Ozempic or Wegovy?
No. Mounjaro contains tirzepatide (dual GIP + GLP-1 agonist), Wegovy contains semaglutide (GLP-1 agonist only), and Ozempic also contains semaglutide but is licensed for diabetes, not weight loss. Mounjaro and Wegovy are the two prescription weight management options in the UK, with different mechanisms and clinical trial results. Your prescriber will assess which suits your needs.
What dose should I start with, and how long does a bundle last?
You start with 2.5 mg weekly (weeks 1–4), escalate every 4 weeks, and reach maintenance between 5–15 mg depending on response. A 3-month bundle covers the full escalation schedule from starting dose through the first maintenance phase. Your prescriber will advise whether you need subsequent bundles based on your progress and how you tolerate 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.