FIELD: medicine. SUBSTANCE: antiviral preparation contains, wt.%: ah active substance - 1-phenyl-2.3-dimethyl-4- iodopyrazolone-5, 50-70; pharmaceutically acceptable additional substances, starch, 10-30; hydrated crystalline glucose, 10-19; salt of stearic acid, 0.1-1.0; low-molecular polyvinylpyrrolidone at 2600-12600 average molecular mass, 2.0-4.0. Preparation is preferably designed as a tablet. The novel antiviral preparation is resistant at prolonged storage (not less that 3 years), is of improved strength characteristics, easily reveals active substance 1-phenyl-2.3-dimethyl-4-iodopyrazolone-5. EFFECT: higher bioavailability and pharmacological activity of the preparation. 2 cl, 1 tbl
