[Experimental study of sulpiride-bromocriptine association on the female rat estrous cycle (author's transl)].

The effects of joint treatment by sulpiride (1 mg . kg-1 S.C. pro die) and bromocriptine (3 mg . kg-1 S.C. pro die) on female rat estrous cycles were carried out on a group of ninety animals for a twenty-one days period. The results thus obtained show that: (i) bromocriptine alone does not disturb the estrous cycle, (ii) when given both with sulpiride, it prevents from this psycholeptic's estrous cycle blockade, (iii) finally, it leads to the regression of a blockade induced by an eight days sulpiride pretreatment. Therefore, it is likely that these two drugs act antagonistically at tuberoinfundibular dopaminergic receptors involved in the prolactin and gonadotropins release.