the effect of levodopa ( l-dopa ) , alone or in combination with a peripheral decarboxylase inhibitor ( pdi ) , on plasma levels of aromatic-l-amino acid decarboxylase ( alaad , = dopa decarboxylase ) , l-dopa , 3-o-methyl-dopa ( 3-omd ) , dopamine ( da ) , noradrenaline , adrenaline and dopamine beta-hydroxylase has been studied .
C0028351
noradrenaline
C0014563
adrenaline