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 the muscle or veins. Doses of insulin are measured in units. U-100 insulin options, 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.
Do not use Humulin N if any of the following occurs:
The insulin substance (the white material) remains at the bottom of the bottle after mixing
There are clumps in the insulin after mixing
If you notice your insulin requirements changing, talk to your doctor.