The invention relates to medicine, in particular to searching and developing novel medicinal agent for treating pancreatic diabetes. The invention is based on the development of more effective and less toxic medicinal agents based on indole derivatives which exhibit antidiabetic, hypolipidemic, hypoglycemic, hypocholesterolemic activity and insulin resistance-improving actions and the structure of which differs from the structure of traditionally used compounds. The inventive indole derivatives are also low-toxic and easily tolerated.