Abstract
Diabetes mellitus is an ever-increasing disease and is defined as a “social disease” due to the significant economic damage it causes to the affected individuals and the community involved in its care. This paper presents the process of certification of diabetic disease and the application for invalidity in order to obtain welfare and economic benefits provided by law; it, also, describes the prescription process and the appropriateness of therapeutic prescription for the diabetic patient in terms of clinical-prescriptive appropriateness and economic-prescriptive appropriateness. Finally, it reports on the side effects of the most common antidiabetics, the off-label use of metformin and the physician's responsibilities in the light of the Gelli-Bianco law.