Hypoprothrombinemia and bleeding due to cefoperazone.
D000368:Aged; D002438:Cefoperazone / Q000009:adverse effects*; D006801:Humans; D007020:Hypoprothrombinemias / Q000139:chemically induced*; D008297:Male; D008551:Melena / Q000139:chemically induced*; D014812:Vitamin K / Q000627:therapeutic use
D014812:Vitamin K; D002438:Cefoperazone