Objective: To evaluate longitudinal prescription practice trends for patients diagnosed with posttraumatic stress disorder (PTSD) using a national cohort of veterans who engaged in Veterans Health Administration (VHA) care from 2009 to 2018.
Methods: Using ICD-9 and ICD-10 codes to determine diagnoses, 1,353,416 patients diagnosed with PTSD in VHA care were retrospectively identified who were not diagnosed with bipolar or psychotic spectrum disorder. Veterans were included in the analytic sample starting in the year of their first PTSD diagnosis for each year that they were active in VHA care.