This document discusses the use of bisphosphonates to prevent bone loss in men receiving androgen deprivation therapy for prostate cancer and in women receiving adjuvant therapy for breast cancer. Androgen deprivation therapy increases fracture risk by decreasing bone mineral density and increasing bone turnover. The ZOMETA 705 study examined using bisphosphonates to prevent bone loss in men receiving androgen deprivation therapy. Several other studies discussed examined using bisphosphonates like risedronate, clodronate and zoledronic acid to prevent bone loss in women receiving chemotherapy or adjuvant hormonal therapy for breast cancer. The Z-FAST/ZO-FAST study specifically examined if zoledronic acid could protect against bone loss caused by the breast cancer drug an