Phase II Metronomic Dosing, Etoposide, Cyclophosphamide, D0 Prostate Cancer

50 mg per day of Etoposide orally for 21 consecutive days. Etoposide will be alternated with oral cyclophosphamide. The drug is administered at night just prior to bed. Week 1 of each cycle will begin with etoposide.

50 mg per day of cyclophosphamide orally for 21 consecutive days. Cyclophosphamide will be alternated with oral etoposide. The drug is taken 2 hours after breakfast. The patient will be asked to increase hydration throughout the day. Recommendation is at least 6, 8oz glasses of water or other non-caffeinated beverage. Week 4 of the each cycle will begin with cylcophosphamide. Chronic administration of cyclophosphamide at this dose has been well tolerated