[[Reproductive and developmental toxicity study of 6-amidino-2-naphthyl 4(-)[(4,5-dihydro-1H-imidazol-2-yl) amino] benzoate dimethanesulfonate (FUT-187). (II)--Oral administration to rats during the period of fetal organogenesis (prenatal examination)].

6-Amidino-2-naphthyl 4(-)[(4,5-dihydro-1H-imidazol-2-yl) amino] benzoate dimethanesulfonate (FUT-187) was given orally to pregnant Crj : CD (Sprague-Dawley) rats from days 7 through 17 of gestation at dose levels of 50, 200 and 800 mg/kg/day. In the 800 mg/kg/day group, salivation just after dosing, suppression in body weight gain and decreased food consumption were observed. No external, visceral and skeletal anomalies attributable to FUT-187 were observed in fetuses. From the present result, it is considered that the no-effect dose level of FUT-187 for dams and fetuses are 200 mg/kg/day and 800 mg/kg/day respectively.