Hormonal therapy combats prostate cancer by cutting off the supply of testosterone to discourage cancer growth. Hormonal control can be achieved by surgically removing the testicles or through the aggressive use of pharmaceuticals. This course of treatment targets cancer that has spread and grown beyond the reach of localized treatments such as surgery or radiation protocols. Hormonal therapy is also helpful in alleviating the painful and distressing symptoms of advanced disease. Although hormone therapy is not a cure, it will halt the advance of disease sometimes for years.