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 Increase Blood Pressure?
No, Mounjaro (tirzepatide) does not typically increase blood pressure. In fact, clinical trials show many people experience improved blood pressure control during treatment. However, individual responses vary, and your GP or prescriber should monitor your blood pressure regularly, especially if you have existing hypertension. This NHS-aligned guide explains what the evidence shows and what to expect when taking Mounjaro in the UK.
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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.
What Clinical Evidence Shows About Mounjaro and Blood Pressure
Clinical trials of tirzepatide (Mounjaro) have consistently shown neutral or beneficial effects on blood pressure. The SURMOUNT trials, which assessed Mounjaro's safety and efficacy, found that blood pressure either remained stable or improved in most participants. This is particularly important because many people who are overweight or obese have high blood pressure (hypertension), and Mounjaro's weight loss effect often leads to secondary improvements in cardiovascular health.
In fact, high blood pressure is one of the weight-related health conditions that can make you eligible for Mounjaro prescription in the UK. When weight decreases, blood pressure typically improves as well, creating a positive feedback loop. Some patients also experience improvements in cholesterol levels and overall heart disease risk during Mounjaro treatment.
- Weight loss of 15–21% (average in trials) often improves blood pressure naturally
- Mounjaro does not directly raise blood pressure as a mechanism of action
- Individual cardiovascular responses vary based on baseline health
Clinically BackedWeight Loss
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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 Monitoring and What to Expect During Mounjaro Treatment
If you're prescribed Mounjaro through an NHS specialist weight management service or privately via a UK-licensed prescriber, blood pressure monitoring is part of routine clinical care. Your prescriber will likely check your blood pressure at the start of treatment and at regular follow-up appointments to ensure you remain safe. This is especially important if you already take blood pressure medication (antihypertensives), as your dose may need adjustment as you lose weight and your blood pressure naturally improves.
Always inform your GP or prescriber about any existing blood pressure medication, and report any unusual symptoms like dizziness, chest discomfort, or persistent headaches. When combined with lifestyle changes—reduced-calorie diet and increased physical activity—Mounjaro typically supports better overall cardiovascular health. Use our free GLP-1 weight loss calculator to see estimated weight loss at different doses, and our BMI calculator to track improvements in your health metrics.
- 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 Mounjaro cause high blood pressure as a side effect?
No. Clinical trials show Mounjaro does not increase blood pressure. Most people experience stable or improved blood pressure during treatment, especially as weight decreases. If you have hypertension, inform your prescriber, as blood pressure medication may need adjustment.
What if I'm already taking blood pressure medication and start Mounjaro?
Tell your GP or prescriber immediately. As you lose weight on Mounjaro, your blood pressure often improves, and your antihypertensive medication dose may need to be reduced. Regular monitoring ensures your blood pressure stays within a safe range.
How often will my blood pressure be monitored on Mounjaro?
Monitoring frequency depends on your individual health profile. Most UK prescribers check blood pressure at baseline and at follow-up appointments (typically every 4–8 weeks during dose titration). If you take blood pressure medication, more frequent checks may be recommended initially.
Does the tirzepatide dose affect blood pressure risk?
No. Clinical evidence does not show dose-dependent increases in blood pressure. Whether you're on 2.5 mg, 10 mg, or the maximum 15 mg weekly, blood pressure effects remain neutral or beneficial. Individual response varies based on overall health and weight loss progress.
Can I get Mounjaro on the NHS if I have high blood pressure?
Yes. Hypertension (high blood pressure) is a recognised weight-related health condition that can qualify you for Mounjaro prescription. If your BMI is 27–29.9 and you have high blood pressure, you may be eligible for NHS specialist weight management services. Discuss referral with your GP.
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.