Oxytocin May Improve Social Interaction in Borderline Personality Disorder Oxytocin, a hormone known to influence a variety of emotional responses including attachment and social engagement, may help patients with borderline personality disorder (BPD) feel less threatened socially and reduce anger and aggressive behavior associated with the disorder. For the full report, see http://ajp.psychiatryonline.org/article.aspx?articleID=1733361