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“ Yohimbine potentiated the effect of nortriptyline or amitriptyline administered in a single dose and the effect of imipramine and amitriptyline given for 2 weeks.”
Progress in Neuro-Psychopharmacology and Biological Psychiatry • 1989 | View Paper
“ Amitriptyline (10 mg/kg, twice daily) in combination with yohimbine (5 mg/kg, twice daily) decreased 5HT2 receptor binding after 4 days of treatment, whereas amitriptyline alone required 10 days to decrease the density of 5HT2 receptors.”
“ 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).”