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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How To Stop Mounjaro Burps
Excessive burping (belching) is a common side effect when starting or increasing Mounjaro doses. This happens because tirzepatide slows how quickly food moves through your stomach, allowing more gas to build up. The good news is that burping typically reduces over time as your body adjusts, and several practical strategies can help minimise this uncomfortable symptom whilst you're taking Mounjaro in the UK.
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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.
Why Mounjaro Causes Burping and How To Manage It
Mounjaro (tirzepatide) is a GIP and GLP-1 receptor agonist that slows gastric emptying — the rate at which food leaves your stomach. This delayed movement allows gas to accumulate, causing increased burping, particularly after meals. The effect is usually most pronounced in the first few weeks and often improves as your body adapts over several weeks or months.
Practical strategies to reduce Mounjaro burps include:
- Eat smaller, more frequent meals rather than large portions
- Chew food slowly and thoroughly — this aids digestion and reduces swallowed air
- Avoid carbonated drinks, fizzy water, and sparkling beverages entirely
- Limit foods that produce excess gas (beans, lentils, cruciferous vegetables, high-fibre foods)
- Stay upright for at least 30 minutes after eating
- Sip still water between meals rather than drinking large amounts at once
- Avoid straws — drinking directly from a cup reduces air intake
- Take a gentle walk after meals to support digestion
If burping persists significantly beyond the first 8–12 weeks, discuss this with your prescriber, as dose adjustment or alternative options may be considered.
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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.
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When To Contact Your GP or Prescriber
Mild to moderate burping usually resolves naturally as your body adjusts to Mounjaro treatment. However, contact your GP or prescriber if burping is severe, persistent beyond 12 weeks, or accompanied by severe stomach pain (which could indicate pancreatitis — a rare but serious side effect requiring urgent medical attention).
Your prescriber may also want to review whether your current dose is appropriate or whether adjustments to your injection schedule could help. Remember that all Mounjaro side effects should be discussed with the healthcare professional managing your prescription — never stop taking Mounjaro without guidance. If you're considering whether Mounjaro is right for you, use our free GLP-1 weight loss calculator to explore projected outcomes at different doses.
- 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.
How long does Mounjaro burping last?
Burping typically improves within 4–12 weeks as your body adjusts to tirzepatide. Some people experience significant improvement within 2–3 weeks, whilst others take longer. The effect usually reduces naturally over time, especially as your stomach adapts to the delayed emptying effect.
Are Mounjaro burps a sign something is wrong?
No — burping is a very common and expected side effect during the adjustment phase. It reflects the medication's mechanism of slowing gastric emptying. However, if burping is severe, sudden, or accompanied by severe stomach pain, vomiting, or chest discomfort, seek medical advice promptly.
Can diet changes really reduce Mounjaro burps?
Yes. Eating smaller meals, avoiding carbonated drinks, chewing thoroughly, and limiting gas-producing foods all measurably reduce burping. Pacing your eating and staying upright after meals also helps. These changes support your stomach's ability to process food more comfortably.
Should I stop taking Mounjaro if the burping is bad?
No — do not stop Mounjaro without guidance from your prescriber. Burping is temporary and manageable. Contact your GP or the healthcare professional managing your prescription to discuss the symptom. They may adjust your dose, review your dietary approach, or offer additional strategies before considering any changes to treatment.
Is burping different on Mounjaro than on Wegovy?
Wegovy (semaglutide) is a GLP-1 agonist only, whilst Mounjaro is a dual GIP and GLP-1 agonist. Both slow gastric emptying and can cause burping, though the intensity and duration may vary between individuals. Both typically improve with time and dietary adjustment. Your prescriber can discuss which medication suits your tolerance profile best.
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