FIELD : medicine; pharmaceuticals.SUBSTANCE : group of inventions refers to medicine, chemical-pharmaceutical industry and pharmacy, more specifically to a pharmaceutical composition for oral administration, having hypoglycemic and hypolipidemic activity. Pharmaceutical composition contains (Z)-ethyl 2-(4-(4-chlorophenyl)-2, 4-dioxo-3-(3-oxo-3, 4-dihydroquinoxalin-2(1H)-ylidene)butanamido)-4-methyl-5-phenylthiophene-3-carboxylate as an active substance and additives –microcrystalline cellulose, sodium croscarmellose, crospovidone, lactose monohydrate, partially pregelatinized corn starch, stearic acid salt. Pharmaceutical composition is presented in the form of a tablet coated with a coating. Second invention relates to a method for preparing a pharmaceutical composition which consists in using wet granulation and direct pressing of various components.EFFECT : group of inventions is characterized by sufficient mechanical strength, high therapeutic activity, satisfactory technological characteristics and stable during storage for at least 2 years.12 cl, 1 tbl, 3 ex