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  • Title: Metoclopramide effect on serum prolactin LH and FSH in patients with polycystic ovary syndrome.
    Author: Prelević GM, Würzburger MI, Perić LA.
    Journal: J Endocrinol Invest; 1988 Apr; 11(4):255-9. PubMed ID: 3137253.
    Abstract:
    In order to investigate the DA activity in polycystic ovary syndrome (PCOS) we studied the response of LH, FSH and PRL to a dopamine receptor antagonist metoclopramide (MCP-10 mg iv) in 12 PCO subjects (7 with normal and 5 with elevated levels of prolactin). The prolactin and LH responses to metoclopramide were compared to those obtained in 6 normal cycling women. Although a significant increase in PRL levels was documented after MCP administration in all PCO patients and normal cycling women (p less than 0.01), the highest increment in PRL levels was observed in normoprolactinemic PCO subjects. In contrast a blunted PRL response was observed in hyperprolactinemic PCO patients. There was a negative correlation between basal PRL levels and the maximum net increase in PRL after MCP. In both groups of PCO subjects MCP administration caused initial decrease in LH levels followed by an increase after 4 h. In hyperprolactinemic PCO patients this observed MCP effect on LH was more pronounced and significantly different in comparison with normoprolactinemic PCO patients (p less than 0.01). MCP administration did not cause significant acute alterations in LH levels in normal cycling women and no significant FSH changes in either PCO or control subjects. A relative dopamine deficiency might cause hypersecretion of PRL and LH in patients with PCOS and hyperprolactinemia.
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