OXT and psychiatric disorder: However, a number of studies in healthy people, as well as in patients with psychological or psychiatric disorders show that administration of oxytocin leads to negative not positive social effects (Epperson et al., 1996; Bartz et al., 2011; Feifel, 2011; Mah et al., 2012), suggesting that exogenous oxytocin does not always lead to increased affiliation.