Actrapid 100 IU/ml Solution for Injection is a short-acting insulin preparation designed to regulate blood glucose levels in individuals with diabetes mellitus. Manufactured by Novo Nordisk Pharma (Pvt.) Ltd., this medication is indicated for the treatment of type 1 and type 2 diabetes, particularly when blood sugar levels cannot be adequately controlled by diet and oral hypoglycemic agents. It is also used in the initial stabilization of diabetes during acute conditions such as diabetic ketoacidosis, hyperosmolar non-ketotic syndrome, and during periods of stress like severe infections and major surgeries. Actrapid is administered subcutaneously and typically starts to lower blood sugar within 30 minutes, with its peak effect occurring between 1.5 to 3.5 hours, and a duration of action lasting approximately 7 to 8 hours. The dosage and administration should be individualized based on the patient's needs, and it is often used in combination with intermediate or long-acting insulin preparations.