It is very important that your doctor check you or your child closely while you are receiving this medicine to make sure it is working properly. Blood tests may be needed.
This medicine may cause serious types of allergic reactions, including anaphylaxis. Anaphylaxis can be life-threatening and requires immediate medical attention. Stop using this medicine and check with your doctor right away if you or your child have a rash, itching, hoarseness, trouble breathing, trouble swallowing, lightheadedness or dizziness, or any swelling of your hands, face, or mouth after you receive this medicine.
It is recommended that you carry an identification (ID) card or letter stating that you have hemophilia A and the type of medicine you are using. If you have any questions about what kind of identification to carry, check with your doctor.
Check with your doctor right away if you have any symptoms of parvovirus infection: fever, chills, drowsiness, runny nose, and followed by a rash or joint pain.
Check with your doctor right away if you have pain or tenderness in the upper stomach, pale stools, dark urine, loss of appetite, nausea, unusual tiredness or weakness, or yellow eyes or skin. These could be symptoms of a serious liver problem.
This medicine is made from donated human blood. Some human blood products have transmitted certain viruses to people who have received them, although the risk is low. Human donors and donated blood are both tested for viruses to keep the transmission risk low. Talk with your doctor about this risk if you are concerned.
The stopper of the bottle (vial) contains dry natural rubber (a derivative of latex), which may cause allergic reactions in people who are sensitive to latex. Tell your doctor if you have a latex allergy before you start using this medicine.