Morrisons Clinic Weight Loss Service: Your Questions Answered About Mounjaro
Published on 30th Sep, 2025
Mounjaro is fast becoming a revolutionary treatment in weight loss. Known for its potential to help people lose up to 20% of their body weight, Mounjaro is being praised as a breakthrough in tackling obesity. In this Q&A, we’ll explore how Mounjaro works, its effectiveness, safety, and who it’s suitable for. Read on to discover how this innovative medication could support your weight loss journey.
What is Mounjaro, and why is it considered a breakthrough for weight loss?
Mounjaro is a new injectable weight loss medication licensed for use in the UK. It’s being hailed as a groundbreaking treatment due to its significant weight loss potential and positive impact on overall health. Used alongside dietary and lifestyle changes, Mounjaro can help individuals lose up to 20% of their body weight.
How does Mounjaro work?
Mounjaro works by stimulating two naturally occurring hormonal receptors:
Glucagon-like peptide-1 (GLP-1): This regulates blood glucose levels, signals the brain to reduce hunger, and slows gastric emptying, helping you feel full longer.
Glucose-dependent insulinotropic polypeptide (GIP): regulates energy balance in brain and fat cells, enhancing the GLP-1 effect of suppressing your appetite and improving sugar control.
Together, GLP-1 and GIP amplify weight loss potential by reducing hunger, controlling cravings, and promoting feelings of fullness for longer periods.
How is Mounjaro different from other weight loss medications?
Unlike other weight loss injections such as Ozempic or Wegovy, which only target GLP-1 receptors, Mounjaro also targets GIP receptors. This dual-action approach makes it more effective, offering increased weight loss results.
Is Mounjaro safe?
Mounjaro is approved for use by the MHRA (Medicines and Healthcare products Regulatory Agency), the UK government department responsible for ensuring that medicines and medical devices are effective and safe.
Throughout your treatment, our qualified pharmacists and clinical team will closely monitor your progress. If you experience any side effects or changes in your overall health, it’s important to inform us so we can ensure your continued safety and wellbeing. Are you ready to start your own weight loss journey?
Who is eligible for Mounjaro?
Mounjaro is designed for individuals who are medically classified as overweight or obese. Eligibility criteria include:
Aged between 18 and 75 years.
A BMI over 30 or a BMI over 27 with a weight-related condition (e.g., high blood pressure or high cholesterol).
Not having diabetes or pre-diabetes requiring treatment.
Meeting other clinical criteria based on your medical history.
During your consultation, our clinical team will evaluate whether Mounjaro is the right option for you.
How effective is Mounjaro for weight loss?
Clinical studies, such as the SURMOUNT-1 trial, have shown impressive results:
A 15% weight loss with a 5mg dose.
A 19.5% weight loss with a 10mg dose.
A 20.9% weight loss with a 15mg dose over 72 weeks.
These results demonstrate Mounjaro’s effectiveness when combined with a healthy diet and lifestyle changes.
What are the side effects of Mounjaro?
Common side effects may include:
Nausea, headaches, tiredness.
Stomach issues like constipation, diarrhoea, or indigestion.
Gallstones or acid reflux.
Injection site reactions, dizziness, and occasional hair loss.
A full list can be found here. Most common side effects subside within a few weeks, but if you experience severe or rare symptoms, stop the medication and seek medical advice immediately.
How do you use the Mounjaro KwikPen?
Your weight loss injectable is injected once a week on the same designated day and each pen contains 4 full doses. You can take it at any time of day, with or without meals. The important thing is to take it on the same day each week. We recommend planning a 15-minute window and slotting that into your weekly routine. You can fund the full instructions for use here.
What happens if I stop using Mounjaro?
If you stop using Mounjaro, the medication will no longer regulate your appetite by acting on the GLP-1 and GIP hormone receptors. As a result, your appetite may return to levels experienced before starting the treatment, which could lead to an increase in hunger and potential weight gain.
To help manage these effects, it’s essential to maintain a healthy, balanced diet and continue a regular exercise routine even after stopping Mounjaro.
Mounjaro offers an exciting and effective option for those looking to manage their weight, especially when combined with a healthy lifestyle. If you're considering Mounjaro as part of your weight loss journey, our expert team at Morrisons Clinic are here to support you every step of the way.
