Intravenous infusions of ifosfamide/mesna and perturbation of warfarin anticoagulant control.

We report three patients who had serious disturbance of anticoagulant control while receiving ifosfamide/mesna-containing cytotoxic chemotherapy in association with warfarin. In view of the likely biological potentiation of warfarin by ifosfamide/mesna, close monitoring of anticoagulant control should be performed during the co-administration of these drugs.