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FAQ's on IU and Syringe - How do I find IU on a Syringe

Syringe IU's - Parts of a Syringe


We receive many questions on what is an IU? How do I find IU on a syringe? How many IU in a syringe? Find Your Answers Here. 

  • The needle is short and thin. It is made of a special material that allows the needle to slide through the skin easily with less pain. It comes with a cap to cover and protect it before it is used.

  • The Syringe is the plastic chamber that holds the medicine. It is marked with lines (calibrations) on the side. The lines show you how many units (IU) you are injecting.

  • The plunger is the long thin rod that slides up and down the inside of the syringe. Its function is to either draw the medicine into the syringe or push the medicine out of the syringe through the needle. It has a rubber seal at the lower end to prevent medicine from leaking out. The rubber seal is fitted in such a way that it matches the line on the syringe.


 .3 cc/ml = 30 units
1/2 /.5cc = 50 units

1 cc/ml = 100 units


Let's take look at the 1/2ml/cc Syringe with needle. Assuming you require 15 units of medicine. You would move the top ring of the plunger to the number 15.

ALWAYS REMEMBER EACH SYRINGE IS TO BE USED ONLY ONCE! DISPOSE OF YOUR SYRINGE WITH NEEDLE INTO A SHARP CONTAINER. It is always recommended to dispose of your Syringe and Needle in a safe manner so that children or pets can not access them.