Overview A Clinical Study of Patients With Symptomatic NOH to Assess Sustained Effects of Droxidopa Therapy Status: Terminated Trial end date: 2015-02-01 Target enrollment: Participant gender: Summary Evaluate the clinical efficacy and safety of droxidopa versus placebo over a 17 week (maximum) treatment period in patients with symptomatic NOH. Phase: Phase 3 Details Lead Sponsor: Chelsea TherapeuticsTreatments: DroxidopaMannitol