Factor IX Complex (Human)

Factor IX Complex is a sterile, lyophilized concentrate composed of a number of Vitamin K-dependent clotting factors found in functioning human plasma. Also known as prothrombin complex concentrate, products containing this complex often include Factor IX (antihemophilic factor B), Factor II (prothrombin), Factor X (Stuart-Prower Factor), and low levels of Factor VII (proconvertin) derived from human plasma. Many commercially available products also contain low levels of other antithrombotic proteins. For example, Kcentra (FDA) also contains the antithrombotic proteins C and S, while Bebulin VH (FDA) contains heparin. Coagulation factors are purified from pooled human plasma and subsequently sterilized and treated.

Although Factor IX Complex products contain many different coagulation components, Factor IX is the lead component for potency and efficacy, particularly when used for the treatment of bleeding associated with Hemophilia B (Factor IX deficiency). As the product Kcentra, Factor IX Complex is also indicated for the urgent reversal of acquired coagulation factor deficiency induced by Vitamin K antagonist (VKA, e.g., warfarin) therapy in adult patients experiencing acute major bleeding or requiring rapid reversal of therapy.