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
Free tracker included with every download this week
Does Mounjaro Reduce Blood Pressure in the UK?
Yes, Mounjaro (tirzepatide) can help reduce blood pressure in some adults. Clinical evidence shows that weight loss achieved through tirzepatide treatment often leads to improved blood pressure readings, particularly in people with hypertension who are overweight or obese. This is partly because excess weight itself increases blood pressure strain. However, individual results vary significantly, and blood pressure improvement depends on the amount of weight lost and individual health factors. Your GP should monitor your blood pressure regularly if you're taking Mounjaro. This guide covers how Mounjaro affects blood pressure, UK prescription costs, and how to access it through NHS or private routes.
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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.
How Mounjaro Affects Blood Pressure — Clinical Evidence
Weight loss as the primary mechanism: Mounjaro works by reducing appetite and supporting weight loss. Since excess weight is a major driver of high blood pressure, losing weight—typically 15–21% of body weight in clinical trials—often leads to lower blood pressure readings. This effect is indirect but well-established in obesity research.
Direct metabolic improvements: Beyond weight loss, tirzepatide improves insulin sensitivity and glucose control, which can benefit cardiovascular health. These metabolic changes may contribute to blood pressure reduction independent of weight loss alone.
- Clinical trials showed average systolic blood pressure reductions of 5–10 mmHg alongside weight loss
- Greater weight loss typically correlates with greater blood pressure improvement
- Results are not assured—some people see significant improvement, others see modest changes
- Blood pressure monitoring by your GP is essential during treatment
Individual responses vary based on baseline blood pressure, other medications, and overall health. Always inform your GP of all medications and health conditions before starting Mounjaro.
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.
Mounjaro Cost and How to Access It in the UK
NHS access: Mounjaro is available through NHS specialist tier 3/4 weight management services, typically following a GP referral. However, NHS availability varies significantly by region and waiting lists can be several months to years in many areas. Your GP can advise whether you meet NICE eligibility criteria and refer you if appropriate.
Private prescription cost: Through private online prescribers, Mounjaro costs approximately £140–£320 per month depending on the dose. This includes the prescription assessment and the medication itself dispensed by a GPhC-registered pharmacy. Doses start at 2.5 mg and escalate weekly until reaching the target dose (typically 10–15 mg). Each KwikPen contains a 4-week supply.
Try our GLP-1 weight loss calculator above to estimate potential outcomes at different Mounjaro doses, and use our BMI calculator to determine your current weight category and eligibility threshold.
- 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.
Will Mounjaro definitely lower my blood pressure?
No—Mounjaro does not directly lower blood pressure. However, the weight loss it supports often leads to blood pressure improvement. Clinical trials showed average reductions of 5–10 mmHg, but individual results vary significantly. Your GP should monitor your blood pressure regularly during treatment.
How much weight do I need to lose to see blood pressure improvement?
Even modest weight loss—5–10% of body weight—can improve blood pressure readings. Mounjaro users in clinical trials lost 15–21% on average, which typically resulted in meaningful blood pressure reductions. However, responses vary between individuals.
Can I get Mounjaro on the NHS for high blood pressure?
Mounjaro is NHS-available through specialist weight management services if you meet eligibility criteria (BMI ≥30 or ≥27 with comorbidities like hypertension). You'll need a GP referral to tier 3 services. Availability and waiting times vary significantly by region.
What's the difference between NHS and private Mounjaro access?
NHS: Free but requires specialist referral and can involve long waiting lists. Private: Costs £140–£320/month, faster access via online clinical assessment with a UK-licensed prescriber, dispensed by GPhC-registered pharmacy. Both require a valid prescription from a UK-licensed doctor.
Is Mounjaro the same as Wegovy for blood pressure reduction?
Both are GLP-1-based weight loss medications that can support blood pressure improvement through weight loss. However, Mounjaro (tirzepatide) is a dual GIP+GLP-1 agonist, while Wegovy (semaglutide) is a GLP-1 agonist only. Clinical trials showed Mounjaro produced slightly greater average weight loss, which may correlate with greater blood pressure reduction, but individual results vary considerably.
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.