Endogenous catecholamines- ep inephr ine 【Mechanism of action】 A potent stimulant of both a and B adrenergic receptor,and its effects on target organs are thus complex B》 《一《安一I BC 《多 B0》Endogenous catecholamines-- epinephrine 【 Mechanism of action 】 A potent stimulant of both α and β adrenergic receptor, and its effects on target organs are thus complex