FACTOR IX COMPLEX, HEAT TREATED IS A STERILE PRODUCT PREPARED FROM POOLED NORMAL HUMAN PLASMA. IT CONTAINS, IN CONCENTRATED FORM, CLOTTING FACTORS II (PROTHROMBIN), VII, IX, AND X. OTHER PROTEINS ARE ALSO PRESENT IN MINIMAL AMOUNTS. IT PROVIDES AN INCREASE IN PLASMA LEVELS OF FACTOR VII AND FACTOR IX AND CAN TEMPORARILY CORRECT THE COAGULATION DEFECT OF PATIENTS WITH DEFICIENCIES IN THESE FACTORS. PLASMA LEVELS OF FACTORS II AND X WILL ALSO BE INCREASED.