the concentrations of norepinephrine or epinephrine required to alter urinary sodium and potassium excretion and flow rate were in the upper physiological range or higher and the responses were small except for intravenous epinephrine , which decreased sodium excretion at very low physiological concentrations ( 120-400 pg/ml ) .
C0028351
norepinephrine
C0014563
epinephrine