Insulin is one of the agents that can be used in the treatment of diabetes mellitus. Diabetes is characterized by a progressive decline in beta-cell function and insulin secretion. Over time, a significant number of persons with diabetes will require intensification of management, and possibly insulin treatment to achieve acceptable glycemic control [3]. Insulin remains the oldest and most effective treatment of hyperglycemia. It is also possibly the cheapest form of treatment relative to its potency, particularly when used in its animal or human forms.