Factor VIII inhibitor treatment with high doses of F VIII.

A hemophilic patient with F VIII inhibitor was treated with intermittent F VIII infusions of 40 - 50 units per kg bodyweight per week. Although the inhibitor declined during treatment, an anamnestic response was recorded on two occasions. A continuous high dose F VIII regimen of 200 units per kg per day resulted in reduction of the inhibitor concentration to less than 1 unit per ml. No anamnestic response was seen after a later exposure to intensive F VIII therapy.