pressor responses to phenylephrine and depressor responses to isoprenaline ( after pretreatment with reserpine and atropin ) were not different while the blood pressure increase to 5-hydroxytryptamine was inhibited , indicating that after 6 weeks treatment the blood pressure reduction is not directly related to alpha-adrenoceptor blockade .
C0031469
phenylephrine
C0020649
blood pressure reduction