All drugs used in this study have been used in the prevention of graft-versus-host-disease after allogeneic hematopoietic cell transplant. Tacrolimus and Methotrexate used in combination are currently used as standard of care in the prevention of graft-versus-host-disease after allogeneic hematopoietic cell transplant. Tacrolimus and Rapamycin is a newer combination we are testing to see if it would be better than Tacrolimus and Methotrexate.
The purpose of this research is to compare the effectiveness of Tacrolimus and Rapamycin to Tacrolimus and Methotrexate in the prevention of severe graft-versus-host-disease. Graft-versus-host-disease (GVHD) is a risk associated with allogeneic hematopoietic cell transplants (HCT). An allogeneic hematopoietic cell transplant is a transplant using bone marrow and blood cells that come from someone other than the patient (a donor).