“The reduction of noradrenaline (NA) utilization in the brain evoked by a single dose of antidepressants and the increase of NA utilization induced by chronic treatment with imipramine or nortriptyline were prevented by yohimbine.”
“ Yohimbine and phentolamine administered in doses regarded as blocking presynaptic alpha-adrenoreceptors counteracted locomotor sedation elicited in rats by antidepressant drugs (imipramine, nortriptyline and amitriptyline).”