Adult IV inj Per dose: 20% of dose of oxazaphosphorine, administered at time zero (time of administration of oxazaphosphorine) repeated after 4 & 8 hr. W/ continuous oxazaphosphorine infusion: 20% of the oxazaphosphorine dose given as bolus inj at time zero, followed by continuous infusion of Uromitexan of up to 100% of the initial oxazaphosphorine dose. Continue infusion for a further 6-12 hr after the end of the oxazaphosphorine administration.