The present invention relates to pharmaceutical agents which are agents for the prophylaxis or treatment of hypogonadism, male climacteric disorder, frailty, cachexia or osteoporosis; the pharmaceutical agents frailty suppressants, muscle strength enhancers, muscle increasing agents, cachexia suppressants, body weight decrease suppressants, agents for the prophylaxis or treatment of prostate hypertrophy, amyotrophy or muscle loss caused by a disease or an agent for reducing the prostate weight. The present invention also relates to methods for the prophylaxis or treatment of hypogonadism, male climacteric disorder, frailty, cachexia or osteoporosis in a mammal, which comprises administering an effective amount of the pharmaceutical agents of the present invention or a prodrug thereof; use of the pharmaceutical agents of the present invention or a prodrug thereof for the production of an agent for the prophylaxis or treatment of hypogonadism, male climacteric disorder, frailty, cachexia or osteoporosis; and the like.