Mounjaro pens include manufacturer instructions — read these fully before your first dose. If you’re unsure at any point, seek advice before injecting.

1. Check the pen
   Remove the pen from the packaging and check the expiry date and that the medicine looks as expected.
   
2. Choose and prepare the injection site
   Pick an area of stomach, thigh, or upper arm. Make sure the skin is clean and dry and not sore, bruised, or irritated.
   
3. Prepare the pen
   Remove the pen cap. Clean the injection site with an alcohol swab and allow it to dry.
   
4. Attach a new needle
   Use a fresh needle each time to reduce infection risk and avoid blocked needles. Push the needle straight on and twist until secure.
   
5. Remove the needle shields
   Remove the outer needle cap and keep it (you’ll need it for safe removal later). Remove the inner needle cover.
   
6. Inject the dose
   Hold the pen firmly against your skin at a 90-degree angle. Press the button to deliver the dose and keep the pen steady.
   
7. Hold briefly, then remove
   Keep the pen in place briefly to ensure the dose is delivered, then remove it from the skin.
   
8. Dispose of the needle safely
   Re-cap the needle using the outer cap, remove it from the pen, and dispose of it in a sharps container (or follow the disposal instructions you’ve been given).
   Avoid injecting into the same exact spot each week — rotating sites helps reduce irritation.