although labetalol also interfered with the measurement of urinary excretion of metanephrine , it did not interfere with the measurement of urinary excretion of vanillylmandelic acid , homovanillic acid , 5-hydroxyindoleacetic acid , and serotonin , and it probably did not interfere with the measurement of plasma concentrations of dopamine , norepinephrine , and epinephrine .
C0028351
norepinephrine
C0014563
epinephrine