MAXSULIN N 40 IU, 10 ML is an injectable suspension containing 40 International Units (IU) of human isophane insulin (NPH or intermediate-acting) per milliliter in a 10 ml vial. This type of insulin has a slower onset and a longer duration of action compared to regular insulin, and it is used to help control blood sugar levels in individuals with diabetes mellitus, typically administered subcutaneously once or twice daily to provide basal insulin coverage.