Insugen-N 100IU/ml Refil Injection contains Insulin Isophane (100IU), an intermediate-acting insulin used in the management of diabetes mellitus to improve glycemic control. This formulation provides a prolonged duration of action by forming a suspension of insulin crystals with protamine, resulting in a slower absorption rate compared to regular insulin. Insugen-N is indicated for patients requiring basal insulin coverage to maintain blood glucose levels between meals and overnight. It is administered subcutaneously, typically once or twice daily, as determined by the healthcare provider based on individual patient needs and glycemic response. Dosage adjustments should be made cautiously, considering factors such as diet, exercise, and concurrent medications to minimize the risk of hypoglycemia. Patients should be educated on proper injection techniques, storage conditions, and the importance of regular blood glucose monitoring. Insugen-N should not be used during episodes of hypoglycemia or in patients with hypersensitivity to insulin or any of the excipients. This insulin preparation is an essential component of diabetes management, often used in combination with short-acting insulins or oral hypoglycemic agents to achieve optimal glycemic control and reduce the risk of diabetes-related complications.