Actrapid 100 IU/ml The drug Flexpen 3 ml is categorised as a "antidiabetic," a class of drugs used to treat both type 1 and type 2 diabetes mellitus. Elevated blood glucose levels are a symptom of diabetes mellitus. The body does not produce enough insulin when a person has type 1 diabetes (a hormone essential for glucose metabolism). In type 2 diabetes, either the body stops producing enough insulin or the action of insulin is inhibited.Disclaimer : For More Details, Contact Your Physician