Thirty-two women with ovarian dysfunction due to hyperprolactinemia were treated with a new derivative of lisuride-terguride. Twenty-three patients were treated for infertility. A microadenoma was confirmed in five, and three other patients had had a macroprolactinoma surgically removed. The finding in one of the patients was diagnosed as the syndrome of empty sella. Galactorrhea was present in 18 women. The duration of treatment ranged from 2 to 33 months. The determination of therapeutic dosages was based on individual responses on the prolactin levels within a range from 0.1 to 4.5 mg per day. Increased prolactin levels were successfully normalized in twenty-one treated patients. Regular periods were reappeared in 59% of the women. Thirteen (56%) became pregnant, seven gave birth to healthy babies, two of the patients aborted in the first trimester. Four women are still in later stages of pregnancy. Galactorrhea disappeared in 56% of the patients, being markedly inhibited in the remaining ones. In two cases, microadenoma disappeared after treatment, and in those after surgery the postoperative findings were decreased, in one patients there is no alteration in the pathology. Side effects were seen in 34% of the patients, being mostly mild in nature, and including in most cases nausea, headache and stomach pain. The complaints were transient, receding after prolonged treatment.