OXT and Anxiety: For example, oxytocin (Windle et al., 1997; Ring et al., 2006, 2010; Lukas and Neumann, 2014; Nisbett et al., 2023) and μ-opioid receptor agonists (Rezayof et al., 2009; Mutlu et al., 2012; Berrocoso et al., 2013; Samuels et al., 2017; Pekarskaya et al., 2021; Bruijnzeel et al., 2022) can reduce anxiety- and depression-like behavior and increase positive social interaction.