The present invention relates to the methods of treating endocrine-regulated cancers, including hormone resistant cancers, for example. More specifically, the present invention relates to a method of increasing the sensitivity of hormone resistant cancers to hormonal therapeutic agents. In particular embodiments, the present invention concerns delivery of a histone deacetylase inhibitor and a hormone targeted drug to an individual with cancer. In specific embodiments, the histone deacetylase inhibitor and the hormone targeted drug act synergistically to treat the cancer, including by overcoming resistance to a cancer therapy.