The practice of insulin therapy by sliding scale, that is, injecting insulin at set intervals (every 4-6 hours) only if the glycemia goes above a fixed threshold is still common in our country too, but it should be considered an inadequate and ineffective method. This approach, in fact, as well as not facing the problem of basic insulinization, does not prevent hyperglycemia either ,intervening only after it has been found and represents a risk of subsequent hypoglycemia. The insulin therapy on a sliding scale basis leads to therapeutic inertia and also the risks represented by a lack of therapeutic planning.