intermittent hormone therapy
a type of treatment for advanced prostate cancer in which hormone drugs are stopped after a man’s blood prostate-specific antigen (PSA) level drops to a very low level and remains stable for a while. If the PSA level begins to rise, the drugs are started again. In another form of intermittent hormone therapy, the drugs are given for fixed periods of time – for example, 6 months on followed by 6 months off. See also androgen deprivation therapy, hormone therapy, prostate-specific antigen.