NCIt definition : The hydrochloride salt form of phenylephrine, a direct-acting sympathomimetic amine
chemically related to adrenaline and ephedrine with potent vasoconstrictor property.
Phenylephrine is a post-synaptic alpha-adrenergic receptor agonist that causes vasoconstriction,
increases systolic/diastolic pressures, reflex bradycardia, and stroke output.;