Propranolol, a non-selective β-AR antagonist with equal affinity for both β1- and β2-AR (Rehsia and Dhalla, 2010), was studied as a general anxiolytic treatment of anxiety disorders, PTSD and addiction for its amnesic effect (Famularo et al., 1988; Steenen et al., 2016). Here, ADRB2 is linked to post-traumatic stress disorder.