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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Night Sweats on Mounjaro — UK Cost and Access Information
Night sweats are a reported side effect of Mounjaro (tirzepatide) that some users experience, though not everyone. This guide explains what night sweats mean in the context of Mounjaro use, how to access this prescription-only injection in the UK, and what you can expect to pay through NHS or private routes. If you're considering Mounjaro for weight management, understanding both the potential side effects and the cost and access pathway will help you make an informed decision with your GP or prescriber.
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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.
Understanding Mounjaro Night Sweats and Access Routes in the UK
Night sweats on Mounjaro are not among the most commonly reported side effects, but some people do experience increased sweating, particularly at night, especially in the first few weeks of treatment or during dose titration. Night sweats may be related to the body's metabolic changes as Mounjaro begins to work, or they may be a sign of an underlying issue that requires investigation.
If you experience persistent or severe night sweats while on Mounjaro, contact your prescriber immediately. This could indicate a medical issue unrelated to the medication, such as infection, hormonal changes, or other health conditions.
Accessing Mounjaro in the UK: You can obtain Mounjaro through two main routes:
- NHS specialist services: Referral through your GP to a tier 3 or tier 4 weight management service. NICE (National Institute for Health and Care Excellence) has approved tirzepatide for use in NHS specialist weight management programmes. However, NHS access is limited by regional availability and waiting times can be several months in many areas.
- Private prescription: Through an online consultation with a UK-licensed prescriber. No NHS referral is required. Private prescriptions are dispensed by GPhC-registered pharmacies.
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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.
Mounjaro Cost, Eligibility, and What to Expect from Online Prescribing
Cost of Mounjaro in the UK: Private Mounjaro costs typically range from £120 to £300+ per month depending on the dose (starting dose 2.5 mg to maximum 15 mg) and the prescribing provider. Each KwikPen contains 4 weekly doses. Costs are lower at starting doses and increase as you titrate to higher maintenance doses. NHS prescriptions, where available, follow standard prescription charges (currently £9.90 per item in England, or free if you qualify for exemption).
Online prescription process: You'll complete an online health questionnaire, have a brief video or phone consultation with a UK-licensed prescriber, and receive a prescription if deemed clinically appropriate. Your medical history, current medications, and BMI will be assessed. The prescriber will confirm whether Mounjaro is suitable for you. If approved, your prescription is sent to a registered pharmacy for dispensing. Delivery typically takes 3–5 working days.
Eligibility for Mounjaro: You're typically eligible if you have a BMI of 30 kg/m² or above, or 27–29.9 with weight-related health conditions such as type 2 diabetes, high blood pressure, or sleep apnoea. For South Asian, Chinese, Black African, or Black Caribbean adults, eligibility may begin at BMI 27.5 or above. Your prescriber will assess your individual circumstances. You must be 18 or over, not pregnant, and not breastfeeding. Use our free BMI calculator above to check your BMI and assess your potential eligibility. Our GLP-1 weight loss calculator can also help you understand how Mounjaro might support your weight management goals when combined with lifestyle changes.
- 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.
What should I do if I experience night sweats while taking Mounjaro?
Contact your prescriber or GP. While night sweats are not a commonly reported side effect, they can occur. Your prescriber needs to assess whether they're related to Mounjaro or indicate another health issue. Keep a brief record of when night sweats occur and any other symptoms. Do not stop taking Mounjaro without medical guidance.
Is Mounjaro available on the NHS in my area?
Availability varies significantly by region. Ask your GP to refer you to your local tier 3 weight management service to find out if tirzepatide (Mounjaro) is available. Some areas have access through NICE-approved pathways; others have limited availability or long waiting lists. Your GP can check with your integrated care board (ICB).
How much does a private Mounjaro prescription cost per month in the UK?
Private costs typically range from £120 to £300+ monthly depending on your dose. Starting dose (2.5 mg) is usually cheapest; costs increase as you titrate to higher maintenance doses (5 mg, 10 mg, 15 mg). Each KwikPen contains 4 weekly doses. Prices vary slightly between prescribing providers, but all must be GPhC-regulated.
Do I need a GP referral to get a private Mounjaro prescription?
No. You can access private Mounjaro through an online consultation with a UK-licensed prescriber without an NHS referral. You'll complete a health questionnaire and have a brief consultation. If approved, your prescription is dispensed by a registered pharmacy. However, your prescriber will still assess your medical history and eligibility.
How long does it take to receive Mounjaro after a private prescription is approved?
Once your prescription is approved by the prescriber, it's sent to the pharmacy for dispensing. Delivery typically takes 3–5 working days. Some providers offer faster delivery options. Always check the expected delivery timeframe with your chosen prescribing provider before ordering.
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.