Your doctor or a nurse will show you how to administer your injections at home, including which syringes and needles to use. Choosing the right size needle and syringe is necessary to get the correct dose of medicine, inject it properly, and minimize pain. Syringes are labeled based on how much liquid they can hold. There are two ways syringe capacity can be measured.
- Milliliters (mL) for liquid volume
- Cubic centimeters (cc) for the volume of solids
Needles are labeled differently than syringes. The packaging will have a number, then a "G," and then another number.
- The letter G indicates the gauge of the needle. The higher this number is, the thinner the needle.
- The second number indicates the length of the needle in inches.
For larger amounts of medicine, a wider needle with a lower gauge is often a better choice. While it might hurt more, a wide, low-gauge needle will deliver the injection faster than a thin, high-gauge needle.