An approach to the control of massive hemorrhage in cyclophosphamide-induced cystitis by intravenous vasopressin: a case report.

Massive bleeding owing to cyclophosphamide-induced hemorrhagic cystitis was not affected by intravesical instillation of 4 per cent formalin or 1 per cent silver nitrate. After initiation of a continuous systemic infusion of vasopressin hematuria and transfusion requirements diminished markedly. Adverse reactions were mild. Intravenous vasopressin was a safe and effective means to control temporarily life-threatening hemorrhagic cystitis.