Review article summarizes current knowledge of the use of oral antidiabetics (approved for treatment of type 2 diabetes) in type 1 diabetic patients. Following drugs were tested: metformin, gliptines, analogues of GLP-1, glitazones, inhibitors of α-glukozidase and gliflozines. The latter seem to be the most perspective ones, however, more studies are warranted for definitive confirmation of their efficacy and safety. Current evidence-based results did not clearly show efficacy and safety of oral antidiabetics as adjuvant treatment in type 1 diabetic patients and thus, they still represent off-label treatment in this type of diabetes.Key words: oral antidiabetics - type 1 diabetes mellitus.