to elucidate the mechanism of this depressor effect , the responses of mean arterial blood pressure and plasma epinephrine ( ep ) , norepinephrine , prolactin and renin activity to i.v . administration of bromocriptine ( 500 micrograms/kg ) , alone and after pretreatment with i.v . metoclopramide , a da antagonist which crosses the blood-brain barrier , and domperidone , a da antagonist which does not cross the blood-brain barrier , were examined in conscious unrestrained spontaneously hypertensive rats .
C0014563
epinephrine
C0028351
norepinephrine