to study da tonus in puerperium we tested plasma prl levels in different groups of puerperal subjects ( 6 per group ) after acute administration of direct or indirect da agonists or placebo : da , l-dopa ( a da precursor ) , l-dopa plus carbidopa ( a peripheral dopa-decarboxylase inhibitor ) , nomifensine ( a da-releasing and blocking or reuptake agent ) and amphetamine ( a da releaser ) .
C0023570
l-dopa
C0353697
l-dopa