Mechanism of Action of Phenylephrine
Introduction Phenylephrine is a selective α1-adrenergic receptor agonist used as a vasopressor, nasal decongestant, and mydriatic agent. It produces vasoconstriction by stimulating α1 receptors on vascular smooth muscle. Due to its minimal β-adrenergic activity, phenylephrine primarily affects vascular tone with little direct effect on the heart. Mechanism of Action (Step-wise) A key exam point is … Read more