This invention discloses the use of an E-selectin antagonist in methods and compositions for treating or preventing immunocompromised conditions resulting from medical treatment. The present invention is particular useful for prophylaxis and/or treatment of hematopoietic disorders including neutropenia, agranulocytosis, anemia and thrombocytopenia in individuals receiving or proposed to receive treatments that target rapidly dividing cells or that disrupt the cell cycle or cell division.
