The present study is aimed at investigating whether long-term use of bromocriptine on patients affected by amenorrhea and galactorrhea may improve the clinical picture after discontinuation of treatment. For this reason 26 patients with amenorrhea and galactorrhea have been studied. Sixteen had high PRL values and 10 were normoprolactinemic. The normoprolactinemic patients underwent a TRH test. All the patients underwent computed skull axial tomography (CT scan) and were treated with bromocriptine, at a daily dosage variable from 2.5 to 10 mg for an average period of 26 months. After discontinuation of treatment, follow-up was carried-out for 20 months. Eighty-seven percent of the patients affected by amenorrhea, galactorrhea and hyperprolactinemia had regular menses, in 75 of the patients galactorrhea completely disappeared. Of the ten patients with normoprolactinemic amenorrhea and galactorrhea, only those who positively responded to the TRH test had regular menstruation and showed disappearance of galactorrhea. Upon discontinuation of treatment amenorrhea recurred in 68% of the cases whereas galactorrhea recurred in 80%. CT scans revealed disappearance of 3 microadenomas and reduction in size of the macroadenoma. Long-term use of bromocriptine represents the first choice treatment for the syndrome of galactorrhea-amenorrhea. In case of relapse, treatment must be continued for an undefined period of time.