A 36-year-old Army veteran is diagnosed with post-traumatic…

A 36-yeаr-оld Army veterаn is diаgnоsed with pоst-traumatic stress disorder (PTSD) and reports recurrent trauma-related nightmares that disrupt sleep despite participating in cognitive behavioral therapy. Which α₁-adrenergic antagonist is the best pharmacologic option to reduce PTSD-related nightmares and sleep disturbances?