Exploring the LEOPOLD Kids Part A trial

KOVALTRY® was studied to determine its effectiveness and safety in children, in a trial called LEOPOLD Kids Part A1

Hemophilia A Clinical Trial Study

There were 51 previously treated children (0 to 12 years old) with severe hemophilia A in LEOPOLD Kids Part A, studied for 6 months.1

Clinical Trial – ABR

Doctors studied annual bleed rate (ABR), choosing either 2x/week prophylaxis (22 children), or 3x/week or every‑other‑day prophylaxis (29 children) based on each child's needs.1

Hemophilia A Clinical Trial

These dosing regimens were chosen because they most closely resemble the way doctors prescribe treatment for their younger patients.2


KOVALTRY® is a medicine used to replace clotting factor (Factor VIII or antihemophilic factor) that is missing in people with hemophilia A.

KOVALTRY® is used to treat and control bleeding in adults and children with hemophilia A. KOVALTRY® can reduce the number of bleeding episodes in adults and children with hemophilia A when used regularly (prophylaxis). Your healthcare provider may give you KOVALTRY® when you have surgery.

KOVALTRY® is not used to treat von Willebrand Disease.


You should not use KOVALTRY® if you are allergic to rodents (like mice and hamsters) or any ingredients in KOVALTRY®.

Tell your healthcare provider if you have heart disease or are at risk for heart disease.

The common side effects of KOVALTRY® are headache, fever, and itchy rash.

Allergic reactions may occur with KOVALTRY®. Call your healthcare provider right away and stop treatment if you get tightness of the chest or throat, dizziness, decrease in blood pressure, and nausea.

Your body can also make antibodies, called "inhibitors," against KOVALTRY®, which may stop KOVALTRY® from working properly. Consult with your healthcare provider to make sure you are carefully monitored with blood tests for the development of inhibitors to Factor VIII.

Tell your healthcare provider about any side effect that bothers you or that does not go away.

Call your healthcare provider right away if bleeding is not controlled after using KOVALTRY®.

For additional important risk and use information, please see full Prescribing Information.

References: 1. KOVALTRY® [prescribing information]. Whippany, NJ: Bayer HealthCare LLC; 2016. 2. Coppola A, Di Capua C, De Simone C. Primary prophylaxis in children with haemophilia. Blood Transfus. 2008;6(suppl 2):s4-s11.

You are encouraged to report negative side effects or quality complaints of prescription drugs to the FDA. Visit www.fda.gov/medwatch or call 1-800-FDA-1088.

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Site Last Modified 11/2018