Indometacin farnesilの血液凝固系に及ぼす影響--正常ラットおよびWarfarinによる低プロトロンビン血症ラットにおけるIndomethacinとの作用比較

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The influence of indometacin farnesil (IMF), a prodrug of indomethacin, on blood coagulation was compared with indomethacin (Ind) in normal rats and warfarin treated rats. In normal rats, 30 mg/kg of Ind very markedly shortened the extrinsic coagulation time and decreased the hematocrit, GOT, GPT and ALP in plasma at 24 hr after administration, but 3 mg/kg of Ind and both 10 and 100 mg/kg of IMF did not influence any parameter. In warfarin treated rats, 2.5 mg/kg of Ind decreased the normal prothrombin level at 48 hr, and 10 mg/kg of Ind prolonged the blood coagulation time, decreased the normal prothrombin level and hematocrit, and increased the PIVKA-II level. Moreover, at 48 hr, 3 of 6 rats in the 10 mg/kg Ind-administered group died due to intestinal bleeding. IMF at all dosages examined did not affect any of the above parameters.
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