the antihypertensive effect followed a time course identical to that of the increase in the cerebral concentration of alpha-methyldopamine and of the decrease in the concentration of dopamine , whereas lowering of blood pressure on the one hand , and changes in the levels of alpha-methylnoradrenaline and noradrenaline , on the other , were not related to each other .
C0020649
lowering
C0028351
noradrenaline