mounjaro 2.5 mg Solution for Injection Pre-Filled Pen Instructions
- June 12, 2024
- mounjaro
Table of Contents
mounjaro 2.5 mg Solution for Injection Pre-Filled Pen

Product Information
The product is called Tirzepatide. It is a pen used for injecting medicine under the skin (subcutaneously). The pen has a purple injection button, a lock ring, an indicator, a clear base, a grey base cap, a grey plunger, and a needle end. It is used once a week and should be stored in the refrigerator. The pen helps retract the needle after the injection is completed.
Product Usage Instructions
- Preparing to inject Mounjaro:
- Remove the pen from the refrigerator.
- Leave the grey base cap on until you are ready to inject.
- Check the pen label to ensure you have the correct medicine and dose, and that it has not expired.
- Inspect the pen for any damage.
- Wash your hands.
- Choosing the injection site:
- Consult your doctor, pharmacist, or nurse to help you choose the best injection site.
- You can inject the medicine in your stomach (abdomen) or thigh.
- If injecting in the upper arm, another person should administer the injection in the back of your upper arm.
- Rotate your injection site each week, using the same area but choosing a different site within that area.
- Injecting Mounjaro:
- Pull off the grey base cap and ensure that the pen is locked.
- Place the clear base flat against your skin at the chosen injection site.
- Unlock the pen by turning the lock ring.
- Press and hold the purple injection button for up to 10 seconds.
- You will know the injection is complete when the grey plunger is visible.
- After the injection, dispose of the used pen in a sharps container.
- Use a new pen for each injection.
- Commonly Asked Questions:
- Air bubbles in the pen are normal and do not affect its functionality.
- The pen does not need to be warmed to room temperature before use.
- Do not unlock the pen or press the purple injection button before removing the grey base cap. If this happens, discard the pen and use a new one.
- A drop of liquid on the tip of the needle when removing the grey base cap is normal. Do not touch the needle.
- It is not necessary to hold the injection button down until the injection is complete, but it may help with stability.
- Hearing more than 2 clicks during the injection is normal. Wait until the second loud click before removing the pen from your skin.
- Check if the grey plunger is visible to ensure you have received your dose correctly.
Instructions for use
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Important information you need to know before injecting Mounjaro.
Read this instruction for use and the package leaflet before using your Mounjaro pre-filled pen (pen) and each time you get a new pen. There may be new information. This information does not take the place of talking to your doctor, pharmacist or nurse about your medical condition or treatment. Talk to your doctor, pharmacist, or nurse about how to inject Mounjaro the right way.
- Mounjaro is a single-dose pre-filled pen.
- The pen has a hidden needle that will automatically insert into your skin when the injection button is pressed. The pen will retract the needle when the injection is completed.
- Mounjaro is used 1 time each week.
- Inject under the skin (subcutaneously) only.
- You or another person can inject into your stomach (abdomen), upper leg (thigh) or upper arm.
- You may need help from someone else if you want to inject in your upper arm.
Guide to parts

Preparing to inject Mounjaro
Remove the pen from the refrigerator. Leave the grey base cap on until you are ready to inject. Check the pen label to make sure you have the right medicine and dose, and that it has not expired. Inspect the pen to make sure that it is not damaged. Make sure the medicine is:
- not frozen
- not cloudy
- colourless to slightly yellow
- does not have particles
- Wash your hands.
Choose your injection site
Your doctor, pharmacist or nurse can help you choose the injection site that
is best for you.
You or another person can inject the medicine in your stomach (abdomen) or
thigh.
Another person should give you the injection in the back of your upper arm. Change (rotate) your injection site each week. You may use the same area of your body, but be sure to choose a different injection site in that area.
-
Step 1 Pull off the grey base cap
Make sure the pen is locked. Do not unlock the pen until you place the clear base on your skin and are ready to inject. Pull the grey base cap straight off and throw it away. Do not put the grey base cap back on – this could damage the needle. Do not touch the needle. -
Step 2 Place clear base on skin, then unlock
Place the clear base flat against your skin at the injection site. Unlock by turning the lock ring. -
Step 3 Press and hold up to 10 seconds
Press and hold the purple injection button. Listen for:- First click = injection started
- Second click = injection completed You will know your injection is complete when the grey plunger is visible.After your injection, place the used pen in a sharps container.
Disposal of your used pen
- Throw away (dispose of) the pen in a sharps container or as directed by your doctor, pharmacist or nurse. Do not throw away (dispose of) pens in your household waste.
- Do not recycle your used sharps disposal container.
- Ask your doctor, pharmacist or nurse about how to dispose of medicines you no longer use.
Storage and handling
- For storage instructions refer to section 5 of the patient information leaflet.
- The pen has glass parts. Handle it carefully. If you drop the pen on a hard surface, do not use it. Use a new pen for your injection.
Commonly asked questions
-
What if I see air bubbles in my pen?
Air bubbles are normal. -
What if my pen is not at room temperature?
It is not necessary to warm the pen to room temperature. -
What if I unlock the pen and press the purple injection button before pulling off the grey base cap?
Do not remove the grey base cap. Throw away the pen and get a new pen. -
What if there is a drop of liquid on the tip of the needle when I remove the grey base cap?
A drop of liquid on the tip of the needle is normal. Do not touch the needle. -
Do I need to hold the injection button down until the injection is complete?
This is not necessary, but it may help you keep the pen steady against your skin. -
I heard more than 2 clicks during my injection — 2 loud clicks and 1 soft one. Did I get my complete injection?
Some people may hear a soft click right before the second loud click. That is the normal operation of the pen. Do not remove the pen from your skin until you hear the second loud click. I am not sure if my pen worked the right way. Check to see if you have received your dose. Your dose was delivered the right way if the grey plunger is visible. Also, see Step 3 of the instructions. If you do not see the grey plunger, contact Lilly for further instructions. Until then, store your pen safely to avoid an accidental needle injury.
What if there is a drop of liquid or blood on my skin after my injection? This
is normal. Press a cotton ball or gauze over the injection site. Do not rub
the injection site.
Other information
- If you have vision problems, do not use your pen without help from a person trained to use the Mounjaro pen.
Where to learn more
- If you have questions or problems with your Mounjaro pen, contact Lilly or your doctor, pharmacist or nurse. Last revised in March 2023
Read User Manual Online (PDF format)
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