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 Cold Hands — What You Need to Know
Cold hands while taking Mounjaro (tirzepatide) is not a commonly reported side effect, but some people do experience changes in circulation or temperature sensitivity. This guide covers what causes cold hands on Mounjaro, when to contact your GP, and how to manage the symptom safely. If you're taking Mounjaro as part of an NHS specialist weight management service or through private prescribing in the UK, understanding potential side effects and knowing when to seek medical advice is important for your safety.
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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.
Cold Hands on Mounjaro — Causes and When to Seek Help
Cold hands are not listed as a common side effect in Mounjaro's UK product information, but some individuals report temperature sensitivity or circulatory changes during treatment. Several factors may contribute to this:
- gradual weight management: As your body composition changes, your metabolism adjusts and blood flow distribution can shift, sometimes affecting extremities first
- Reduced appetite and nutrient intake: If calorie intake drops significantly, your body may prioritise core warmth over extremity circulation
- Medication effect on blood vessels: GIP and GLP-1 receptor agonists can affect vascular function, though cold hands specifically are rare
- Underlying health conditions: Conditions like Raynaud's phenomenon, anaemia, or thyroid issues may become more noticeable during weight loss
If you experience persistent cold hands, contact your GP or the NHS specialist weight management service that prescribed your Mounjaro. They can assess whether it's a medication-related effect or an unrelated health issue.
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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
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Managing Cold Hands — NHS Guidance and Practical Steps
If you develop cold hands while on Mounjaro, your GP can help determine the cause and recommend appropriate management. Keep a simple log of when cold hands occur — during or after meals, all day, or only in cold weather — as this information helps your healthcare team assess whether it's genuinely medication-related.
Practical management strategies include: Staying well-hydrated, maintaining adequate nutritional intake alongside your weight loss, wearing layers and gloves in cold weather, and ensuring you're not losing weight too rapidly. If cold hands are accompanied by colour changes in your fingers (white, blue, or red patches), numbness, or pain, seek medical advice promptly as these could indicate Raynaud's phenomenon or another circulatory condition requiring investigation.
- 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 cold hands a known side effect of Mounjaro?
Cold hands are not listed as a common or very common side effect in Mounjaro's UK product information. However, some people report temperature sensitivity during weight loss treatment. If you experience this, contact your GP to rule out other causes like anaemia, thyroid issues, or underlying circulatory conditions. Your prescriber can assess whether it's medication-related and advise accordingly.
What should I do if I have cold hands while taking Mounjaro?
Contact your GP or the NHS specialist weight management service that prescribed your Mounjaro. They can perform basic assessments like checking your blood pressure, heart rate, and nutritional status. Keep a symptom diary noting when cold hands occur and any other associated symptoms. Don't stop taking Mounjaro without medical guidance — discuss any concerns with your prescriber first.
Could cold hands be caused by weight loss itself rather than Mounjaro?
Yes, gradual weight management can affect circulation and temperature regulation as your body adjusts. If you're losing weight quickly, cold hands may resolve as your loss stabilises. The NHS recommends losing no more than 0.5–1 kg per week for sustainable results. Ensure you're eating enough to support your metabolism and getting adequate iron, B vitamins, and protein — all important for circulation and warmth.
When should I seek urgent medical attention for cold hands?
Seek urgent medical attention if you experience colour changes in your fingers (white, blue, or red), numbness, tingling, pain, or if cold hands are accompanied by chest pain, shortness of breath, or severe fatigue. These could indicate Raynaud's phenomenon, anaemia, heart issues, or other serious conditions. Contact your GP or NHS 111 for guidance if symptoms are concerning.
Can I use our GLP-1 weight loss calculator to check if I'm losing weight too quickly?
Yes — our free GLP-1 weight loss calculator shows projected weight loss timelines based on your starting weight and Mounjaro dose. Weight loss that's too rapid can contribute to side effects like cold hands. If you're losing significantly faster than projected, contact your GP, as this may indicate you need dietary adjustment or dose review. Our BMI calculator also helps track whether your loss is within the NHS-recommended safe range.
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.