Vasopressin
Vasopressin is a vasopressor acting on V1a receptors, making it ideal for vasodilatory shock (sepsis, post-bypass vasoplegia). Unlike catecholamines, it works in severe acidosis without causing tachycardia. Dose: 0.01–0.04 U/min infusion. In cardiac arrest, a single 40 U dose may be used as an alternative to epinephrine.
