So why give both factors together?
Watch how circulating FVIII is quickly inactivated by a variety of proteases (substances that break down proteins) when it travels without the protection of VWF.
Now, watch how the FVIII travels when it is bound to VWF.
- VWF prolongs the half-life of FVIII, slows its breakdown, and helps it stay in the blood longer4,5
- VWF carries FVIII safely to the bleeding site where clotting is needed6
- VWF may prevent inhibitors from binding to FVIII, thus increasing the ability of FVIII to stop bleeding5
Important Safety Information
ALPHANATE is contraindicated in patients who have manifested life-threatening immediate hypersensitivity reactions, including anaphylaxis, to the product or its components.
Anaphylaxis and severe hypersensitivity reactions are possible with ALPHANATE. Discontinue use of ALPHANATE if hypersensitivity symptoms occur, and initiate appropriate treatment.
Development of procoagulant activity-neutralizing antibodies (inhibitors) has been detected in patients receiving FVIII-containing products. Carefully monitor patients treated with AHF products for the development of FVIII inhibitors by appropriate clinical observations and laboratory tests.
Thromboembolic events have been reported with AHF/VWF complex (human) in VWD patients, especially in the setting of known risk factors.
Intravascular hemolysis may occur with infusion of large doses of AHF/VWF complex (human).
Rapid administration of a FVIII concentrate may result in vasomotor reactions.
Because ALPHANATE is made from human plasma, it may carry a risk of transmitting infectious agents, eg, viruses, the variant Creutzfeldt-Jakob disease (vCJD) agent, and, theoretically, the Creutzfeldt-Jakob disease (CJD) agent, despite steps designed to reduce this risk.
Monitor for development of FVIII and VWF inhibitors. Perform appropriate assays to determine if FVIII and/or VWF inhibitor(s) are present if bleeding is not controlled with expected dose of ALPHANATE.
The most frequent adverse drug reactions reported with ALPHANATE in >1% of infusions were pruritus, headache, back pain, paresthesia, respiratory distress, facial edema, pain, rash, and chills.
Please see full Prescribing Information for ALPHANATE.
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit www.fda.gov/medwatch or call 1.800.FDA.1088.
- ALPHANATE® (antihemophilic factor/von Willebrand factor complex [human]) Prescribing Information. Grifols.
- Hemophilia A (factor VIII deficiency). National Hemophilia Foundation Website. https://www.hemophilia.org/Bleeding-Disorders/Types-of-Bleeding-Disorders/Hemophilia-A. Accessed February 23, 2017.
- Von Willebrand Disease. National Hemophilia Foundation website. https://www.hemophilia.org/Bleeding-Disorders/Types-of-Bleeding-Disorders/Von-Willebrand-Disease. Accessed February 23, 2017.
- Federici AB, Mannucci PM. Ann Med. 2007;39(5):346-358.
- Franchini M, Lippi G. Thromb Haemost. 2010;104:931-940.
- Lacroix-Desmazes S, et al. Blood. 2008;112(2):240-249.