we conclude that in human subjects : ( a ) the plasma epinephrine thresholds for its hemodynamic and metabolic actions lie within the physiologic range , ( b ) epinephrine and norepinephrine accelerate their own metabolic clearance , and ( c ) epinephrine is 10 times more potent than norepinephrine .
C0028351
norepinephrine
C0014563
epinephrine