Clinically reviewed: Wed 31 July
Most users say they can barely feel the needle when they inject! The key to this (and a seamless injection experience) is to follow the detailed step-by-step instructions that will come with your selected weight loss pen.
Make sure you read our What to do before you inject article before you get started. It’s then important to thoroughly read the injection instructions and follow all the key steps; right from preparation, to injecting, and finally to post-injection.
How do I administer Mounjaro?
Step 1 - Prepare the Pen
Pull the pen cap off and wipe the red inner seal with a swab.
Step 2 - Attach the Needle
Select a new pen needle and pull off the paper tab from the outer needle shield.
Push the pen needle straight onto the pen and twist the pen needle on until it is tight.
Pull off the outer needle shield and keep it (it will be reused).
Pull off the inner needle shield and put it in your household bin.
Step 3 - Prime the Pen
Slowly turn the dose knob until you hear 2 clicks and the extended line is shown in the dose window
Hold your pen with the needle pointing up and gently tap the cartridge holder to collect air bubbles at the top
Release some medicine into the air by pushing the dose knob until it stops, then slowly count to 5 while holding the dose knob (the 0 icon must be shown in the dose window)
If you do not see any medicine released while priming the pen, try again but do not repeat more than 2 additional times
Do not inject the needle into your body at this point.
Step 4 - Injecting the Pen
Turn the dose knob until it stops and the 1 icon is shown in the dose window
Insert the needle into your skin (into your pre-chosen injection site)
Inject the medicine by pushing the dose knob in until it stops then slowly count to 5 while continuing to hold the dose knob
Check the 0 icon is now showing in the dose window and pull the needle out of your skin
Step 4 - After injecting
If you see a pinprick of blood after removing the needle (this is normal) lightly press the injection site with a cotton ball (do not rub)
Carefully replace the outer needle shield that you set aside earlier
Unscrew the capped needle and place into your supplied sharps container
Replace the pen cap (never store the pen with a needle attached and always store with the pen cap securely on)
Now your pen has been used it can be stored at room temperature up to 30°C for no more than 30 days (out of direct sunlight, heat and from the sight & reach of children)
If you’ve injected your 4th dose from the pen, the pen (not the needle) can be disposed of in your regular household bin, or taken to a local pharmacy for disposal
For further details, read the Mounjaro injection user guide and follow the steps – read here.
Watch our handy Mounjaro injection video - watch here.
How do I administer Wegovy?
Read the Wegovy injection user guide and follow all the steps – read here.