Epinephrine and norepinephrine (NE) are adrenergics that stimulate the beta and alpha receptors on the target cell. Dopamine has dose-dependent effects on targeted arteries in the kidneys, heart, and brain. Epinephrine (Alpha and Beta Receptor Agonist):  Epinephrine acts on both alpha- and beta-adrenergic receptors and is used in several routes including intravenously (IV), subcutaneously, intramuscularly, … Continue reading 4.15 Alpha and Beta Receptor Agonists (Catecholamines)