<prompt> Wof agent is used to prevent hemorrhagic cystitis caused by cyclophosphamide and ifosfamideBusulfanCarmustineMesnaNiacin  <response>: To prevent hemorrhagic cystitis mesna is routinely given with the drugs. Mesna is a -SH compound that is excreted in urine--binds and inactivates the vasicotoxic metabolitesAcrolein of ifosfamide and cyclophosphamide. Ref:- kd tripathi; pg num:-860 