Humulin N is an insulin that is slower to act and lasts longer than regular human insulin. Humulin N is available in the prefilled Humulin® N KwikPen® or in a Humulin N U-100 vial.
Humulin N is injected under the skin. It should not be injected into muscle or veins. Doses of insulin are measured in units. U-100 insulins, including Humulin N, contain 100 units/mL. With the Humulin N U-100 vial, it is important to use a syringe that is marked for U-100 insulin preparations.