Intravesical Cidofovir for Hemorrhagic Cystitis

2.5 mg/kg of cidofovir administered in 100 ml of normal saline solution through a transurethral catheter inside the bladder. The urinary catheter will be clamped for 2 hours.

2 grams by mouth given approximately 3 hours prior to the bladder instillation of cidofovir.