Question 1

What is Mounjaro?

Accepted Answer

Mounjaro is the brand name for tirzepatide. It is a GIP/GLP-1 receptor agonist made by Eli Lilly. A once-weekly injection that acts on both GIP and GLP-1 receptors. Licensed in the UK for weight management alongside diet and physical activity. It is a prescription-only medicine, so a registered prescriber must assess whether it is suitable for you.

Question 2

How often is Mounjaro taken?

Accepted Answer

Mounjaro is taken once a week as an injection under the skin using a KwikPen (multi-dose pre-filled pen). Always follow your prescriber's instructions and the Patient Information Leaflet that comes with your medicine.

Question 3

What is the starting dose of Mounjaro?

Accepted Answer

Treatment usually starts at 2.5mg and the dose is increased gradually, with at least 4 weeks on each dose. Starting low helps the body adjust and can reduce side effects such as nausea. Your prescriber decides if and when to increase your dose.

Question 4

Is Mounjaro licensed in the UK for weight loss?

Accepted Answer

Licensed in the UK for weight management. MHRA authorised for weight management, November 2023. Licensing can change, so check the MHRA and the SmPC for the latest position.

Question 5

What are the common side effects of Mounjaro?

Accepted Answer

Commonly reported side effects include nausea, diarrhoea, constipation, vomiting, indigestion and reflux and injection site reactions. These are often most noticeable when starting treatment or after a dose increase. Seek urgent help if you have severe, persistent stomach pain that may spread to your back. The Patient Information Leaflet lists all known side effects.

Question 6

Can I get Mounjaro on the NHS?

Accepted Answer

NICE has published guidance on Mounjaro for weight management (NICE TA1026 (December 2024)). NHS access depends on meeting the criteria in that guidance and on how local services are commissioned, so availability varies. Your GP can explain what is available in your area.

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