Phenylephrine

**Semantic type:** Organic Chemical|Pharmacologic Substance

**Definition:** 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.

**Synonyms:** - PHENYLEPHRINE