All of these compounds stimulate release of excessive Prolactin. Common manifestations of hyperprolactinemia (elevated Prolactin levels) in men with hyperprolactinemia typically show hypogonadism, with decreased sex drive, decreased sperm production and impotence. Such men also often show breast enlargement (gynecomastia), but very rarely produce milk. For more details, go to:
http://arbl.cvmbs.colostate.edu/hbooks/pathphys/endocrine/hypopit/prolactin.html
http://arbl.cvmbs.colostate.edu/hbooks/pathphys/endocrine/hypopit/prolactin.html