we have studied , in a double blind controlled trial , 30 male patients with duodenal ulcer to evaluate the effect of prolonged oral administration of ranitidine ( 150 mg bd for 4 weeks ) , a new h2-receptor antagonist , on basal prl , lh , fsh and tsh concentrations , on their response to specific releasing hormones , and on basal and trh-stimulated levels of thyroid hormones .
C0013295
duodenal ulcer
C0034665
ranitidine