[9] Another product, activated prothrombin complex concentrate or FEIBA (Factor Eight Inhibitor Bypassing Agent), may be used for acquired hemophilia.
[12] Common side effects include allergic reactions, headache, vomiting, and sleepiness.
[9][13] Other serious side effects include blood clots which may result in a heart attack, stroke, pulmonary embolism, or deep vein thrombosis.
[17] Prothrombin complex concentrate reverses the effects of warfarin and other vitamin K antagonist anti-coagulants and is used in cases of significant bleeding in people with a coagulopathy.
[18] Several guidelines, including those from the American College of Chest Physicians, recommend prothrombin complex concentrate for warfarin reversal in people with serious bleeding.
[19][20][21][22] For rapid anticoagulation reversal for surgery, four-factor prothrombin complex concentrate reduces international normalized ratio (INR) and decreases bleeding during surgery when compared with administration of fresh frozen plasma.