Mounjaro (tirzepatide)
Mounjaro is a once-weekly injectable prescription medicine. It is used to help manage blood sugar levels in adults with type 2 diabetes and can also be used for weight management in adults who are overweight or have obesity. It works most effectively when used alongside a plan for diet and exercise.
Patient Information: Mounjaro
What is Mounjaro?
Mounjaro (tirzepatide) is a weekly prescription medication that works by mimicking two naturally occurring hormones in your body: GIP and GLP-1. These hormones play a key role in regulating your appetite and signalling to your brain that you are full. By activating these natural signals, Mounjaro helps to reduce food cravings and control hunger, making it easier to manage your calorie intake. From a medical perspective, we view this as a powerful biological tool that works most effectively alongside a balanced diet and physical activity
Key Information
Active Ingredient: Tirzepatide
Administration: Once-weekly injection you can do yourself.
Primary Uses: Used for treating type 2 diabetes and for weight management.
Availability: Mounjaro comes in a multi-dose vial.
What is Mounjaro ?
Mounjaro Dosing
What if I miss a dose?
• If it has been 4 days or less since you should have taken your dose, inject it as soon as you remember. Then, take your next dose as usual on your scheduled day
• If it has been more than 4 days since you should have taken your dose, skip the missed dose. Take your next dose as usual on your scheduled day. Do not take a double dose to make up for a forgotten one.
Mounjaro Dosing Titration
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Mounjaro Administration
Before you use Mounjaro for the first time, your healthcare provider should show you how to inject it. Always read the full "Instructions for Use" leaflet provided with your medicine.
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Prepare: Inspect the vial. Do not use it if it is damaged, or if the medicine looks cloudy or has particles in it.
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Choose Your Injection Site: You can inject into the skin of your stomach (abdomen), your thigh, or your upper arm.
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Rotate Your Site: You must change (rotate) your injection site each week. This helps reduce the risk of skin problems.
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Inject: Follow the steps in the "Instructions for Use" to prepare and inject your dose.
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Dispose: Dispose of your used syringe and needle safely in a sharps container. Never share or reuse your needles or syringes.
Important Note: Every time you inject, select a new location that is at least a finger's width apart from the previous site. Rotating your injection sites is crucial for preventing the development of persistent, hard lumps (fatty nodules), which can form and reduce how well your medication works.
Mounjaro Side Effects
Like all medicines, Mounjaro can cause side effects, although not everybody will experience them. It's important to be aware of what to look for.
Very Common Side Effects (may affect more than 1 in 10 people): Nausea, diarrhoea, constipation, and vomiting. These are often not severe and tend to decrease over time. Low blood sugar (hypoglycaemia) is very common when Mounjaro is used with other diabetes medicines that contain a sulphonylurea or insulin. Your doctor may need to adjust the dose of your other medicines to reduce this risk. Signs of low blood sugar include headache, drowsiness, weakness, dizziness, feeling hungry, confusion, irritability, fast heartbeat, and sweating.
Signs of acute pancreatitis (severe, long-lasting stomach pain that may move to the back)
Severe allergic reactions (breathing problems, swelling of face/throat, wheezing, fast heartbeat)
Bowel obstruction (severe constipation with stomach ache, bloating, vomiting)
Rare – seek immediate medical attention:
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