## What does U-100 mean for insulin syringe?

A “U” is a unit. The numbers 40 or 100 refer to how much insulin (the number of units) is in a set volume of fluid – which in this case is one milliliter. For example, U-100 has 100 units per milliliter and U-40 has 40 units per milliliter. So… U-100 insulin is more concentrated.

### What is the difference between U-40 and U-100 syringes?

A U-100 syringe (with the orange cap) measures out 100 units of insulin per mL, while a U-40 syringe (with the red cap) measures out 40 units of insulin per mL. This means that “one unit” of insulin is a different volume depending on whether it should be dosed in a U-100 syringe or a U-40 syringe.

#### What does U-100 stand for and what syringes are to be used?

U-100 means there are 100 units of insulin per cc. It refers to concentration of insulin. Remember that one cc (cubic centimeter) equals one ml (milliliter). This is an important aspect of choosing a syringe.

**What is the concentration of U100 insulin?**

Insulin concentration is defined by the number of insulin units per milliliter. The standard concentration, U-100, contains 100 units/mL. Likewise, U-200, U-300, and U-500 contain 200, 300, and 500 units/mL, respectively, thereby reducing the administered volume by two- to fivefold.

**Are all U100 syringes the same?**

U100 syringes are available in 3 barrel sizes: 1cc (1 ml), 1/2cc (0.5 ml), and 3/10cc (0.3 ml). The size refers to the maximum volume of insulin the syringe will hold; markings can differ with regard to the size of the syringe and the syringe manufacturer.

## What would happen if you use a U100 syringe to draw up u 40 insulin?

U40 insulin has 40 units of insulin in every ml and the U100 has 100 units. Therefore when converting from a U40 syringe to a U100 syringe you are required to multiply your U40 units by 2.5. Never use U100 insulin with a U40 syringe, you will put your animals life in danger.

### What is the difference between U-100 and U200 insulin?

U-100 means there are 100 units of insulin in every 1 mL. U-200 means there are 200 units of insulin in every 1 mL.