What to Expect from Weightloss Treatment A Guide for UK Patients

Jun 18, 2025 3 min read

Mounjaro (tirzepatide) is a prescription medication recently approved in the UK for weight management. Originally developed to treat type 2 diabetes,...

Mounjaro (tirzepatide) is a prescription medication recently approved in the UK for weight management. Originally developed to treat type 2 diabetes, it has shown significant promise in helping individuals lose weight when combined with a healthy lifestyle. If you're considering Mounjaro as part of your weight loss journey, here's what you can expect.

Understanding Mounjaro

Mounjaro is a once-weekly injectable medication that mimics two hormones: GLP-1 and GIP. These hormones play a role in regulating blood sugar levels and appetite. By enhancing their effects, Mounjaro can help reduce hunger, leading to decreased calorie intake and weight loss.

Eligibility for Mounjaro in the UK

Mounjaro is typically prescribed for adults who:

  • Have a Body Mass Index (BMI) of 30 or higher (classified as obese), or
  • Have a BMI of 27 or higher (overweight) with at least one weight-related health condition, such as high blood pressure or type 2 diabetes.

Before starting Mounjaro, a healthcare professional will assess your medical history and current health status to determine if it's suitable for you.

Expected Weight Loss

Clinical trials have shown promising results:

  • After 4 weeks, some individuals may notice a reduction in appetite and slight weight loss.
  • After 12 weeks, average weight loss can be around 9% of starting body weight
  • After 72 weeks, participants have lost up to 22.5% of their initial body weight on the highest dose.

It's important to note that individual results can vary, and combining Mounjaro with a balanced diet and regular exercise enhances its effectiveness.

Common Side Effects

While many tolerate Mounjaro well, some may experience side effects, especially when starting the medication or increasing the dose. Common side effects include:

  • Nausea
  • Diarrhoea
  • Constipation 
  • Indigestion
  • Injection site reactions (redness or itching)

These side effects often diminish over time. If they persist or become severe, consult your healthcare provider.

Serious Side Effects

Though rare, serious side effects can occur:

  • Severe allergic reactions (e.g., swelling of the face or throat, difficulty breathing)
  • Pancreatitis (inflammation of the pancreas)
  • Kidney problems

Seek immediate medical attention if you experience symptoms like severe abdominal pain, persistent vomiting, or signs of an allergic reaction.

Administration and Dosage

Mounjaro is administered as a subcutaneous injection once a week. The starting dose is typically 2.5 mg, which may be increased based on your response and tolerance. Always follow your healthcare provider's instructions regarding dosage and administration.

Lifestyle Considerations

For optimal results:

  • Diet: Adopt a balanced, calorie-controlled diet rich in fruits, vegetables, lean proteins, and whole grains.
     
  • Exercise: Engage in regular physical activity, aiming for at least 150 minutes of moderate-intensity exercise per week.
     
  • Monitoring: Regularly track your weight, blood sugar levels (if diabetic), and any side effects.
     

Support and Resources

Embarking on a weight loss journey can be challenging, but support is available:

  • My Weight Loss Centre: Offers personalised guidance, resources, and support tailored to your needs.
  • Online Communities: Connecting with others on similar journeys can provide motivation and shared experiences.

Conclusion

Mounjaro presents a promising option for weight management in the UK, especially when combined with lifestyle modifications. As with any medication, it's essential to have open communication with your healthcare provider, monitor your progress, and address any concerns promptly.

For more information or to determine if Mounjaro is right for you, contact My Weight Loss Centre at 01623 572757 or visit myweightlosscentre.co.uk.

 

 

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