Other names: hormonal oncology Hormonal anticancer drugs are used to reduce or prevent proliferation of cancers that are responsive to specific levels of hormones. Hormones are signalling molecules that bind to target cells receptors and stimulates or blocks the cells function. Hormonally responsive cancer can be treated by reducing the level of hormone that is needed for tumor cell growth and survival, by using inhibitors of hormone synthesis or hormone receptor antagonist. Some cancers may be inhibited by increased level of a specific hormone therefore supplementing with a hormone agonist is used to treat these types of cancer.