so , while the ratio s2/s1 was 0.5 in control conditions , this ratio increased significantly to 0.95 if haloperidol ( 0.5 microm ) was present during s2 , suggesting that the presence of this dopaminergic antagonist removed a negative feed-back mechanism that inhibits nicotine-evoked catecholamine release .
C0282151
dopaminergic
C0007412
catecholamine