•Endogenous Catecholamine :- Adrenergic Receptor Agonist Epinephrine,Norepinephrine, Dopamine •Beta-adrenergic Receptor :- Isoproterenol, Dobutamine•Alpha-adrenergic Receptor :- Metaproterenol, Terbutaline,Salbutamol •Adrenergic Receptor+ กระตุ้น CNS :- Amphetamine,•Adrenergic Receptor+ กระตุ้น CNS :- Amphetamine,