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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Weight Loss After Cesarean: UK Prescription Options
Losing weight after a cesarean delivery requires a thoughtful approach, especially if you're breastfeeding. Prescription weight management options are available in the UK for eligible adults, and your GP can help you determine what's right for you during the postpartum period. This guide covers UK-licensed medication options, NHS access, and how to start a conversation with your healthcare team about safe, evidence-based weight loss after cesarean birth.
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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.
UK-Licensed Weight Loss Medications Available
Three prescription-only weight management medications are currently licensed in the UK for eligible adults: Mounjaro (tirzepatide), Wegovy (semaglutide), and Saxenda (liraglutide). These are all GLP-1 or GIP/GLP-1 receptor agonist injections that may help reduce appetite and support feeling fuller after meals. Clinical trials have shown these medications can support average weight loss of 15–21% of body weight when combined with a reduced-calorie diet and increased physical activity.
Eligibility typically requires a BMI of 30 or above, or 27–29.9 with weight-related health conditions. However, if you are breastfeeding, these medications are not recommended, as there is insufficient safety data. Your GP or a licensed prescriber will assess your individual circumstances, including whether you have finished breastfeeding, before prescribing. Use our free BMI calculator above to check your current BMI and understand where you fall within NHS weight categories.
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.
NHS vs Private Access and Getting Started
In the UK, weight loss medication access is available through two routes: NHS specialist weight management services (tier 3) and private prescribing via online consultation. NHS access typically requires a GP referral to a specialist service and can involve waiting lists; availability varies significantly by region. Private prescribing allows faster access without NHS referral, following an online clinical assessment with a UK-licensed prescriber.
To explore your options, start by speaking with your GP about your postpartum weight management goals. Your healthcare team will assess whether prescription medication is appropriate for you, considering factors like breastfeeding status, overall health, and any existing conditions. If eligible, they can discuss which option—NHS or private—best fits your circumstances. Try our free GLP-1 weight loss calculator to estimate potential outcomes with different doses.
Use our free weight converter to track your weight in both kg and stone, and log your progress with our free progress tracker as you work towards your postpartum weight loss goals. Sustainable weight management after cesarean involves dietary changes, physical activity (gradually, as you recover), and professional support—prescription medication is a tool to support these, not replace them.
- 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 I take weight loss injections while breastfeeding after cesarean?
No. Mounjaro, Wegovy, and Saxenda are not recommended during breastfeeding due to insufficient safety data. If you wish to use these medications, you should have finished breastfeeding. Discuss timing with your GP or healthcare provider to ensure safe, evidence-based choices for you and your baby.
How long after a cesarean can I start weight loss medication?
This depends on your individual recovery and whether you are breastfeeding. Most healthcare providers recommend waiting until you have fully recovered from surgery and, if breastfeeding, until you have stopped. Your GP or prescriber will assess your readiness and overall health before prescribing.
What's the difference between Mounjaro and Wegovy for weight loss?
Both are prescription-only injections given once weekly. Mounjaro is a dual GIP/GLP-1 agonist; Wegovy is a GLP-1 agonist. Clinical trials suggest Mounjaro may produce slightly higher average weight loss (15–21%) compared to Wegovy (approximately 15%), though individual results vary significantly.
How do I know if I'm eligible for weight loss medication on the NHS?
NHS prescription weight loss treatment is typically available for adults with a BMI of 30 or above, or 27–29.9 with weight-related health conditions (like type 2 diabetes or high blood pressure). Eligibility and access vary by region. Ask your GP for a referral to your local tier 3 weight management service to find out.
Are there other lifestyle changes I should focus on after cesarean weight loss?
Yes. Gradual physical activity (as you recover), balanced nutrition, adequate sleep, and stress management all support sustainable weight loss. Weight management in the UK is most effective when combining prescription medication (if eligible) with dietary changes and increased activity—medication alone is not a replacement for lifestyle changes.
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.