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Treatment Outcomes

Hemostatic efficacy was assessed in a multicenter, open-label clinical study

In the clinical study, a total of 193 bleeding episodes were reported in 22/37 participants exposed to VONVENDI® [von Willebrand factor (Recombinant)]. For one bleeding episode, a participant received plasma-derived VWF and that episode was therefore not included in the analysis.1

Primary endpoint: The number of study participants (aged 18 to 64 years) with treatment success for control of bleeding episodes. The study duration of the on-demand bleed treatment was 12 months.1,11

The study protocol stipulated that the first dose of VONVENDI be administered together with rFVIII. According to dosing guidelines in the Prescribing Information, VONVENDI may be administered alone if an immediate rise in FVIII:C is not necessary, or if the baseline FVIII:C level is ≥40%.

100% of study participants experienced treatment success: 18/18 (95% CI 81.5 to100) 100% of study participants experienced treatment success: 18/18 (95% CI 81.5 to100)

*Excluded were participants with GI bleeds (n=2) and those in whom the number of infusions to control a bleeding episode was estimated retrospectively (n=2). Sensitivity analyses of treatment success for bleeding episodes confirmed the primary analysis with 100% treatment success for each scenario.

4-point efficacy rating scale

Treatment success was defined as a mean efficacy rating score of less than 2.5 for all bleeding episodes in a subject treated with VONVENDI.1

A 4-point efficacy rating scale was used to define treatment success in the clinical study A 4-point efficacy rating scale was used to define treatment success in the clinical study

 

No additional VWF coagulation factor–containing product required.

Additional VWF coagulation factor–containing product required.

Selected Important Risk Information

Embolism and Thrombosis

Thromboembolic reactions, including disseminated intravascular coagulation (DIC), venous thrombosis, pulmonary embolism, myocardial infarction, and stroke, can occur, particularly in patients with known risk factors for thrombosis. Monitor for early signs and symptoms of thrombosis such as pain, swelling, discoloration, dyspnea, cough, hemoptysis, and syncope.

In patients requiring frequent doses of VONVENDI with recombinant factor VIII, monitor plasma levels for FVIII:C activity because an excessive rise in factor VIII levels can increase the risk of thromboembolic complications.

Efficacy by Bleed Severity

Get an overview of hemostatic efficacy by bleed severity

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Indications VONVENDI [von Willebrand factor (recombinant)] is a recombinant von…

Detailed Important Risk Information Do not use VONVENDI in patients who have had life-threatening hypersensitivity reactions…

Indications

VONVENDI [von Willebrand factor (recombinant)] is a recombinant von Willebrand factor (rVWF) indicated for use in adults (age 18 and older) diagnosed with von Willebrand disease (VWD) for:

  • On-demand treatment and control of bleeding episodes
  • Perioperative management of bleeding

Detailed Important Risk Information

CONTRAINDICATIONS

Do not use VONVENDI in patients who have had life-threatening hypersensitivity reactions to VONVENDI or its components (tri-sodium citrate-dihydrate, glycine, mannitol, trehalose-dihydrate, polysorbate 80, and hamster or mouse proteins).

VONVENDI® [von Willebrand factor (recombinant)] Important Information

Indications

VONVENDI [von Willebrand factor (recombinant)] is a recombinant von Willebrand factor (rVWF) indicated for use in adults (age 18 and older) diagnosed with von Willebrand disease (VWD) for:

  • On-demand treatment and control of bleeding episodes
  • Perioperative management of bleeding

Detailed Important Risk Information

CONTRAINDICATIONS

Do not use VONVENDI in patients who have had life-threatening hypersensitivity reactions to VONVENDI or its components (tri-sodium citrate-dihydrate, glycine, mannitol, trehalose-dihydrate, polysorbate 80, and hamster or mouse proteins).

WARNINGS AND PRECAUTIONS

Embolism and Thrombosis

Thromboembolic reactions, including disseminated intravascular coagulation, venous thrombosis, pulmonary embolism, myocardial infarction, and stroke, can occur, particularly in patients with known risk factors for thrombosis, including low ADAMTS13 levels. Monitor for early signs and symptoms of thrombosis such as pain, swelling, discoloration, dyspnea, cough, hemoptysis, and syncope, and institute prophylaxis measures against thromboembolism based on current recommendations.

In patients requiring frequent doses of VONVENDI in combination with recombinant factor VIII, monitor plasma levels for FVIII:C activity because sustained excessive factor VIII plasma levels can increase the risk of thromboembolic events.

One out of 80 VWD patients treated with VONVENDI in clinical trials developed proximal deep vein thrombosis in perioperative period after undergoing total hip replacement surgery.

Hypersensitivity Reactions

Hypersensitivity reactions, including anaphylaxis, may occur. Symptoms can include anaphylactic shock, generalized urticaria, angioedema, chest tightness, hypotension, shock, lethargy, nausea, vomiting, paresthesia, pruritus, restlessness, wheezing and/or acute respiratory distress. Discontinue VONVENDI if hypersensitivity symptoms occur and administer appropriate emergency treatment.

Neutralizing Antibodies (Inhibitors)

Inhibitors to von Willebrand factor and/or factor VIII can occur. 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.

ADVERSE REACTIONS

In clinical trials, the most common adverse reactions observed in ≥2% of subjects (n=80) were generalized pruritus, vomiting, nausea, dizziness and vertigo.

One subject treated with VONVENDI in perioperative setting developed deep vein thrombosis after undergoing total hip replacement surgery.

Please see VONVENDI full Prescribing Information.