Multiple comprehensive databases including MEDLINE, Embase, Cochrane Library, CINAHL, PsycInfo, and KoreaMed were searched for studies that evaluated the outcomes of atomoxetine therapy in patients diagnosed with nOH published up to September 2, 2020. Further screenings of ClinicalTrials.gov and conference proceedings were conducted to identify relevant literature. The search terms for each database are displayed in Supplementary Material 2 (in the online-only Data Supplement).