The treatment of hypertrophy of the prostate of rats with 4-nitro-3-trifluoromethylisobutyranilide (Sch 13521).

A study was carried out in 146 common rats to assess the effects of 4'-nitro-3'-trifluoromethylisobutyranilide (Sch 13521) on the hypertrophied prostate gland. The hypertrophy was induced in castrated, sexually immature males by s.c. implantation of a pill of testosterone-propionate. After 20 days of administration of Sch 13521 in oral doses of 5, 10 and 25 mg/kg, the dimensions and weight of the hypertrophied prostate gland were reduced by 1.5 to 2 times. After 2 months of administration of the preparation in doses of 10 and 25 mg/kg a reduction of the hypertrophied prostate gland to the dimensions of the intact control was observed. Morphological studies confirmed the efficacy of the therapeutic action of Sch 13521.