The treatment of Factor VIII inhibitors remains controversial and no s
tandard therapy exists, We describe in this report two consecutive pat
ients with this inhibitor that responded to cyclosporin. Clinical impr
ovement of the bleeding diathesis, a return to normal of the PTT, a de
crease in the level of the inhibitor, and a return to normal of the fa
ctor VIII level followed use of this drug. We believe that cyclosporin
is effective in the treatment of factor VIII inhibitors and deserves
further investigation, (C) 1998 Wiley-Liss, Inc.