further evidence for in vivo phenylethanolamine n-methyltransferase inhibitory activity was that the drug markedly inhibited the conversion of a tracer dose of 3h-norepinephrine to 3h-epinephrine in the rat adrenal gland after unit oral doses as low as 5 mg/kg .
C0028351
norepinephrine
C0014563
epinephrine