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Showing 1–24 of 201 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Orthostatic Intolerance Clear all
Completed Phase 2 Interventional Results available

TD-9855 Phase 2 in Neurogenic Orthostatic Hypotension (nOH)

NCT02705755
View directory record Official record
Conditions
Neurogenic Orthostatic Hypotension, Multiple System Atrophy (MSA) With Orthostatic Hypotension, Pure Autonomic Failure, Parkinson Disease, Hypotension, Orthostatic, Orthostatic Hypotension, Pure Autonomic Failure With Orthostatic Hypotension, Parkinson Disease With Orthostatic Hypotension
Interventions
TD-9855, Placebo
Drug
Lead sponsor
Theravance Biopharma
Industry
Eligibility
40 Years and older
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
6
States / cities
Long Beach, California • Farmington Hills, Michigan • Berlin, New Jersey + 3 more
Source: ClinicalTrials.gov public record
Updated Sep 25, 2022 · Synced Jul 22, 2026, 4:44 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Dietary Sodium's Effect on Urinary Sodium and Dopamine Excretion in Patients With Postural Tachycardia Syndrome

NCT01563107
View directory record Official record
Conditions
Postural Orthostatic Tachycardia Syndrome
Interventions
Plasma Volume, Exercise Capacity Test - Bicycle, Posture Study
Radiation · Procedure
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
38 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2020
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jan 24, 2022 · Synced Jul 22, 2026, 4:44 AM EDT
Withdrawn Early Phase 1 Interventional

The Role of the Noradrenergic System in the Nonmotor Symptoms of Parkinson's Disease

NCT04346394
View directory record Official record
Conditions
Parkinson Disease
Interventions
Yohimbine HCl
Drug
Lead sponsor
Nathaniel M. Robbins
Other
Eligibility
Not listed
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Lebanon, New Hampshire
Source: ClinicalTrials.gov public record
Updated Aug 22, 2023 · Synced Jul 22, 2026, 4:44 AM EDT
Completed Phase 2 Interventional Results available

The Effect of CPC on Aborting Tilt Induced Syncope in Patients With a History of Vasovagal Syncope or Near Syncope

NCT04972123
View directory record Official record
Conditions
Syncope, Vasovagal
Interventions
CPC - Capsaicin, Phenylephrine, Caffeine, Tilt Table Test, Placebo
Drug · Diagnostic Test
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years to 50 Years
Enrollment
143 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jul 16, 2024 · Synced Jul 22, 2026, 4:44 AM EDT
Completed Not applicable Interventional Results available

Transcutaneous Stimulation in Spinal Cord Injury

NCT05180227
View directory record Official record
Conditions
Spinal Cord Injury
Interventions
DS8R
Device
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Sep 21, 2025 · Synced Jul 22, 2026, 4:44 AM EDT
Active, not recruiting Not applicable Interventional

Autonomic Effects of Stimulation in SCI

NCT05664646
View directory record Official record
Conditions
Spinal Cord Injury
Interventions
Transcutaneous Spinal Cord Stimulation
Device
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Jul 1, 2026 · Synced Jul 22, 2026, 4:44 AM EDT
Active, not recruiting Early Phase 1 Interventional Accepts healthy volunteers

Histamine as a Molecular Transducer of Adaptation to Exercise

NCT05206227
View directory record Official record
Conditions
Postexercise Hypotension
Interventions
Aerobic Exercise, alpha-FMH, Resistance and Aerobic Exercise, Antihistamine
Behavioral · Drug
Lead sponsor
University of Oregon
Other
Eligibility
18 Years to 40 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2027
U.S. locations
1
States / cities
Eugene, Oregon
Source: ClinicalTrials.gov public record
Updated Jan 22, 2026 · Synced Jul 22, 2026, 4:44 AM EDT
Completed Not applicable Interventional Results available

Aveir DR i2i Study

NCT05252702
View directory record Official record
Conditions
Cardiac Pacemaker, Artificial, Cardiac Rhythm Disorder, Bradycardia
Interventions
Aveir DR Leadless Pacemaker System
Device
Lead sponsor
Abbott Medical Devices
Industry
Eligibility
18 Years and older
Enrollment
464 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
54
States / cities
Scottsdale, Arizona • Jonesboro, Arkansas • Little Rock, Arkansas + 44 more
Source: ClinicalTrials.gov public record
Updated May 26, 2026 · Synced Jul 22, 2026, 4:44 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Periaqueductal Gray-vagus Nerve Interface Malfunction Explain the Natural History With Its Numerous Co-morbidities?

NCT05618054
View directory record Official record
Conditions
Postural Tachycardia Syndrome
Interventions
Looming task
Behavioral
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
12 Years to 21 Years · Female only
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Apr 20, 2026 · Synced Jul 22, 2026, 4:44 AM EDT
Completed Not applicable Interventional Results available

Effect of Exercise in OI

NCT00770484
View directory record Official record
Conditions
Orthostatic Intolerance, Postural Tachycardia Syndrome
Interventions
Propranolol then Placebo, Placebo then Propranolol
Drug
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years to 65 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2015
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Aug 4, 2016 · Synced Jul 22, 2026, 4:44 AM EDT
Not listed Phase 4 Interventional

Ivabradine for Long-Term Effects of COVID-19 With POTS Cohort

NCT05481177
View directory record Official record
Conditions
Long Haul COVID, Postural Orthostatic Tachycardia Syndrome
Interventions
Ivabradine
Drug
Lead sponsor
Uniformed Services University of the Health Sciences
Federal
Eligibility
18 Years to 80 Years
Enrollment
250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 28, 2023 · Synced Jul 22, 2026, 4:44 AM EDT
Completed Phase 4 Interventional Results available

A Study for Patients With Neurogenic Orthostatic Hypotension

NCT00046475
View directory record Official record
Conditions
Hypotension, Orthostatic
Interventions
Midodrine Hydrochloride
Drug
Lead sponsor
Shire
Industry
Eligibility
18 Years and older
Enrollment
140 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1997 – 1999
U.S. locations
15
States / cities
Huntsville, Alabama • Miramar, Florida • St. Petersburg, Florida + 12 more
Source: ClinicalTrials.gov public record
Updated Jun 10, 2021 · Synced Jul 22, 2026, 4:44 AM EDT
Active, not recruiting Early Phase 1 Interventional

Modafinil and Cognitive Function in POTS

NCT01988883
View directory record Official record
Conditions
Postural Tachycardia Syndrome
Interventions
Placebo, Modafinil, Propranolol
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 60 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2026
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jan 14, 2026 · Synced Jul 22, 2026, 4:44 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Phenotyping of Postural Orthostatic Tachycardia Syndrome (POTS)

NCT06292104
View directory record Official record
Conditions
Postural Orthostatic Tachycardia Syndrome
Interventions
multimodal diagnostic testing
Diagnostic Test
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
14 Years and older
Enrollment
350 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2029
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Jul 16, 2026 · Synced Jul 22, 2026, 4:44 AM EDT
Not yet recruiting Not applicable Interventional

The Impact of Improved Vagal Function on Periaqueductal Gray Connectivity

NCT05618067
View directory record Official record
Conditions
Postural Tachycardia Syndrome
Interventions
breathing exercise training
Behavioral
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
18 Years to 50 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Jun 8, 2026 · Synced Jul 22, 2026, 4:44 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Assessment of Vascular Endothelial Function in Postural Tachycardia Syndrome

NCT01308099
View directory record Official record
Conditions
Postural Tachycardia Syndrome
Interventions
Blood Pressure and Blood Flow
Device
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 60 Years
Enrollment
26 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2017
U.S. locations
2
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jan 17, 2017 · Synced Jul 22, 2026, 4:44 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Pathophysiology of Dysautonomia and Postural Tachycardia Syndrome (POTS) in Post-viral Syndromes and COVID-19

NCT07405515
View directory record Official record
Conditions
POTS, POTS - Postural Orthostatic Tachycardia Syndrome, Dysautonomia, Autonomic Dysfunction
Interventions
Blood Sample Collection
Other
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years and older · Female only
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 11, 2026 · Synced Jul 22, 2026, 4:44 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

CRI in POTS in Adolescents

NCT03974737
View directory record Official record
Conditions
Postural Orthostatic Tachycardia Syndrome
Interventions
CRI device (non-invasive vitals sign measurement)
Device
Lead sponsor
University of Colorado, Denver
Other
Eligibility
12 Years to 21 Years
Enrollment
77 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Jan 25, 2021 · Synced Jul 22, 2026, 4:44 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Non-invasive Vagal Neurostimulation (nVNS) in Adolescents With Postural Orthostatic Tachycardia Syndrome (POTS)

NCT06268288
View directory record Official record
Conditions
Postural Tachycardia Syndrome, Autonomic Dysfunction, Postural Orthostatic Tachycardia Syndrome, POTS - Postural Orthostatic Tachycardia Syndrome
Interventions
GammaCore intervention, STEPS management protocol
Device · Other
Lead sponsor
Mayo Clinic
Other
Eligibility
12 Years to 19 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
2
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Oct 30, 2025 · Synced Jul 22, 2026, 4:44 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effect of Dietary Sodium Intake on Vascular Endothelium

NCT01550315
View directory record Official record
Conditions
Postural Tachycardia Syndrome (POTS)
Interventions
Pulsitile Arterial Tonometry (PAT) Protocol, Calf Blood Flow in Reactive Hyperemia (CBF-RH), Evaluation of Forearm-Mediated Dilation
Procedure · Device
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 60 Years
Enrollment
27 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2021
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jan 4, 2022 · Synced Jul 22, 2026, 4:44 AM EDT
Completed Phase 1Phase 2 Interventional Results available

Intravenous Norepinephrine for Orthostatic Hypotension

NCT01285908
View directory record Official record
Conditions
Orthostatic Hypertension
Interventions
Intravenous Norepinephrine Infusion
Drug
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
18 Years and older
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 9, 2014 · Synced Jul 22, 2026, 4:44 AM EDT
Terminated Phase 1 Interventional Results available

Orthostatic Intolerance After Bariatric Surgery

NCT03808740
View directory record Official record
Conditions
Orthostatic Intolerance
Interventions
Atomoxetine, Placebo
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 60 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Sep 26, 2024 · Synced Jul 22, 2026, 4:44 AM EDT
Active, not recruiting Early Phase 1 Interventional Accepts healthy volunteers

Autonomic Determinants of POTS - Pilot1

NCT04050410
View directory record Official record
Conditions
Postural Tachycardia Syndrome
Interventions
Moxonidine, Placebo
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 55 Years · Female only
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2026
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Mar 26, 2026 · Synced Jul 22, 2026, 4:44 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Speed of Robotic Leg Movements and Orthostatic Hypotension in Subacute SCI

NCT04029974
View directory record Official record
Conditions
Spinal Cord Injuries, Orthostatic Hypotension
Interventions
ErigoPro
Device
Lead sponsor
Methodist Rehabilitation Center
Other
Eligibility
16 Years to 70 Years
Enrollment
35 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2026
U.S. locations
1
States / cities
Jackson, Mississippi
Source: ClinicalTrials.gov public record
Updated May 7, 2025 · Synced Jul 22, 2026, 4:44 AM EDT