U.S.FDAApprovesExpandedIndicationforVONVENDI[vonWillebrandfactor(Recombinant)]forAdultsandChildrenwithVonWillebrandDisease
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with this product may develop hypersensitivity reactions to non-human mammalian proteins.
Neutralizing Antibodies
Neutralizing antibodies to VWF and/or factor VIII can occur with VONVENDI. If the expected plasma levels of VWF activity (VWF:RCo) are not attained, perform an appropriate assay to determine if anti-VWF or anti-factor VIII inhibitors are present. Consider other therapeutic options and direct the patient to a physician with experience in the care of either VWD or hemophilia A.
In patients with high levels of inhibitors to VWF or factor VIII, VONVENDI therapy may not be effective, and infusion of this protein may lead to severe hypersensitivity reactions. Since inhibitor antibodies can occur concomitantly with anaphylactic reactions, evaluate patients experiencing an anaphylactic reaction for the presence of inhibitors.
Monitoring Laboratory Tests
Monitor plasma levels of VWF:RCo and factor VIII activities in patients receiving VONVENDI
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