Overview Treatment of Orthostatic Intolerance Status: Active, not recruiting Trial end date: 2025-12-01 Target enrollment: Participant gender: Summary This trial is designed to study the effects of various mechanistically unique medications in controlling excessive increases in heart rate with standing and in improving the symptoms of orthostatic intolerance in patients with this disorder. Phase: Phase 1/Phase 2 Details Lead Sponsor: Satish R. RajCollaborator: National Institutes of Health (NIH)Treatments: AcetazolamideArmodafinilAtomoxetine HydrochlorideClonidineEntacaponeIndomethacinIsosorbideIsosorbide DinitrateIsosorbide-5-mononitrateMecamylamineMelatoninMemantineMidodrineModafinilOctreotidePropranololSertraline