ReFacto® Antihemophilic Factor (Recombinant) is a purified protein produced by recombinant DNA technology for use in therapy of factor VIII deficiency. ReFacto is a glycoprotein with an approximate molecular mass of 170 kDa consisting of 1438 amino acids. It has an amino acid sequence that is comparable to the 90 + 80 kDa form of factor VIII, and post-translational modifications that are similar to those of the plasma-derived molecule. ReFacto has
functional characteristics comparable to those of endogenous factor VIII.
ReFacto® Antihemophilic Factor (Recombinant) is indicated for the control and prevention of hemorrhagic episodes and for surgical prophylaxis in patients with hemophilia A (congenital factor VIII deficiency or classic hemophilia).
ReFacto is indicated for short-term routine prophylaxis to reduce the frequency of spontaneous bleeding episodes. The effect of regular routine prophylaxis on long-term morbidity and mortality is unknown.
ReFacto can be of a significant therapeutic value for treatment of hemophilia A in certain patients with inhibitors to factor VIII6. In clinical studies of ReFacto, patients who developed inhibitors on study continued to manifest a clinical response when inhibitor titers were < 10 BU. When an inhibitor is present, the dosage requirement of factor VIII is variable. The dosage can be determined only by a clinical response and by monitoring of circulating factor VIII levels after treatment (see DOSAGE AND ADMINISTRATION).
ReFacto does not contain von Willebrand factor and therefore is not indicated in von Willebrand's disease.
Published Studies Related to Refacto (Antihemophilic Factor)
Sucrose formulated recombinant human antihemophilic factor VIII is safe and efficacious for treatment of hemophilia A in home therapy--International Kogenate-FS Study Group. [2000.06]
To add an increased level of safety to antihemophilic factor replacement therapy, a full-length, recombinant Factor VIII (rFVIII) product has been developed without human-derived plasma proteins during purification and formulation and using an additional solvent/detergent viral inactivation step...
Clinical Trials Related to Refacto (Antihemophilic Factor)
Study to Establish Bioequivalence of ReFacto AF (BDDrFVIII) With Advate (FLrFVIII) in Hemophilia A [Completed]
The study will consist of two parts: a safety and efficacy period in which all subjects will
participate and a pharmacokinetic analysis period, in which 30 eligible subjects will
participate to compare ReFacto AF and Advate bioequivalency and safety and efficacy of
ReFacto AF in patients with Hemophilia A.
Study Comparing Blood Levels of ReFacto and Advante in Hemophilia A [Completed]
Assessment of the Risk of Inhibitor Formation in Previously Treated Patients With Severe Hemophilia A [Terminated]
Most transient inhibitor formation, if any, will develop within the first 4 weeks. The study
is to further monitor whether participants with severe Hemophilia A will develop inhibitors
or antibodies at the later stage when switched from their current recombinant therapy
produced from Chinese Hamster Ovary (CHO) cell line to KogenateŽ-FS raised in a Baby Hamster
Kidney cell line.
Study Evaluating Safety Of Patients Switching To ReFacto AF In Usual Care Settings [Recruiting]
The study will be investigating safety in patients who switch to ReFacto AF from ReFacto and
other Factor VIII products.
Dose-Response Study of Recombinant Factor VIII Manufactured Protein-Free (rAHF-PFM) in Patients With Hemophilia A [Active, not recruiting]
The purpose of this study is to determine the effect of 3 doses of ADVATE rAHF-PFM on initial
recovery (% increase [IU/dL] per IU/kg infused) and major single-infusion pharmacokinetic
parameters. The 3 doses are 15, 30, and 50 IU/kg. Prior to each infusion, subjects will not
have received treatment with a factor VIII concentrate for at least 3 days. Blood samples
will be drawn within 30 minutes pre-infusion and at 0. 25, 0. 5, 1, 3, 6, 9, 24, 28, 32 and 48
hours post-infusion. A washout period of at least 3 days, but no more than 30 days between
the last blood draw and the next infusion will be observed. During participation, subjects
will maintain their preexisting treatment regimens with ADVATE rAHF-PFM or other factor VIII
A secondary objective is to investigate the relationship between pharmacokinetic parameters
at each dose level and the levels of von Willebrand factor ristocetin cofactor activity and
von Willebrand factor antigen at baseline.
Reports of Suspected Refacto (Antihemophilic Factor) Side Effects
Factor Viii Inhibition (25),
Anti Factor Viii Antibody Positive (13),
Post Procedural Haemorrhage (9),
Drug Ineffective (7),
Colitis Ulcerative (3),
Abdominal Pain Upper (3),
Fatigue (3), more >>
Page last updated: 2006-01-31