VitaminLife.com Online Coupons
Table of Contents > Health Dictionary > Epinephrine reversal

Epinephrine reversal

The fall in blood pressure produced by epinephrine when given following blockage of a-adrenergic receptors by an appropriate drug such as phenoxybenzamine; the vasodilation reflects the ability of epinephrine to activate -adrenergic receptors that, in vascular smooth muscle, are inhibitory; in the absence of a-receptor blockade, the -receptor activation by epinephrine is masked by its predominant action on vascular a-receptors, which causes vasoconstriction.
Search Site