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Showing 1–24 of 32 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Chronic Orthostatic Intolerance Clear all
Terminated Phase 2 Interventional Results available

Study To Assess The Clinical Benefit Of Droxidopa In Subjects With Chronic Fatigue Syndrome

NCT00977171
View directory record Official record
Conditions
Chronic Fatigue Syndrome, Orthostatic Hypotension, Neurally Mediated Hypotension, Neurogenic Orthostatic Hypotension
Interventions
Droxidopa
Drug
Lead sponsor
Chelsea Therapeutics
Industry
Eligibility
18 Years to 65 Years
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Charlotte, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 8, 2014 · Synced Sep 10, 2026, 4:24 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Autonomic Nervous System and Chronic Fatigue Syndrome

NCT00580619
View directory record Official record
Conditions
Chronic Fatigue Syndrome, Orthostatic Intolerance, Postural Tachycardia Syndrome
Interventions
Autonomic Function Testing, Saline infusions, L-NMMA trimethaphan, methyldopa
Other · Drug
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years to 65 Years
Enrollment
170 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2017
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jan 17, 2017 · Synced Sep 10, 2026, 4:24 AM EDT
Active, not recruiting Early Phase 1 Interventional

Autonomic Determinants of POTS - Pilot 2

NCT04140721
View directory record Official record
Conditions
Postural Tachycardia Syndrome
Interventions
Placebo oral tablet, Moxonidine Pill
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 55 Years · Female only
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Mar 26, 2026 · Synced Sep 10, 2026, 4:24 AM EDT
Completed Not applicable Interventional

Aerobic Training and Arterial Stiffness in Chronic Kidney Disease (CKD) Patients

NCT01399489
View directory record Official record
Conditions
Chronic Kidney Disease, Hypertension, Diabetes
Interventions
Exercise training
Behavioral
Lead sponsor
Springfield College
Other
Eligibility
35 Years to 70 Years
Enrollment
51 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
1
States / cities
Springfield, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 22, 2014 · Synced Sep 10, 2026, 4:24 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Unhide® Project: A Digital Health Platform to Collect Lifestyle Data for Brain Inflammation Research

NCT04806620
View directory record Official record
Conditions
Post-Acute COVID-19 Syndrome, ME/CFS, Rheumatic Arthritis, Juvenile Rheumatoid Arthritis (JRA), Psoriatic Arthritis (PsA), Ankylosing Spondylitis (AS), Autoimmune Encephalitis, Celiac Disease, Celiac Disease in Children, Chronic Lyme Disease, Post-treatment Lyme Disease Syndrome, Crohn's Disease, Dysautonomia, Anorexia Nervosa, Bulimia Nervosa, ARFID, Avoidant / Restrictive Food Intake Disorder, Ehlers Danlos Syndrome, Endometriosis, Fibromyalgia (FM), Long COVID, Lupus, Migraines, Mast Cell Activation Syndrome, Multiple Sclerosis, Myalgic Encephalomyelitis (ME), Myasthenia Gravis, Generalized, Myasthenia Gravis in Children, Narcolepsy, Obsessive Compulsive Disorder (OCD), PANDAS, Pediatric Acute-onset Neuropsychiatric Syndrome (PANS), POTS - Postural Orthostatic Tachycardia Syndrome, General Anxiety Disorder, Social Anxiety Disorder, PTSD - Post Traumatic Stress Disorder, Psoriasis, Traumatic Brain Injury, Tourette's Syndrome, Inflammatory Bowel Disease (IBD), Autoimmune Diseases, Neurological Diseases or Conditions, Psychiatric Disorder, Sjogren's Syndrome, Ulcerative Colitis and Crohn's Disease
Interventions
Not listed
Lead sponsor
Brain Inflammation Collaborative
Other
Eligibility
2 Years and older
Enrollment
10,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2030
U.S. locations
1
States / cities
Delafield, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jan 21, 2026 · Synced Sep 10, 2026, 4:24 AM EDT
Completed Phase 2 Interventional Results available

Using Mirabegron to Increase BP in Patients With POTS

NCT06133075
View directory record Official record
Conditions
Postural Orthostatic Tachycardia Syndrome, Chronic Orthostatic Intolerance, Syncope
Interventions
Mirabegron 50 MG, Mirabegron 25 MG
Drug
Lead sponsor
Cedars-Sinai Medical Center
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Apr 7, 2026 · Synced Sep 10, 2026, 4:24 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 Sep 10, 2026, 4:24 AM EDT
Completed Phase 2 Interventional

Propranolol to Treat Fainting in Children With Sympathoadrenal Imbalance

NCT00093860
View directory record Official record
Conditions
Syncope
Interventions
Propranolol
Drug
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
Not listed
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2005
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Sep 10, 2026, 4:24 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Long COVID Immune Profiling

NCT06027255
View directory record Official record
Conditions
Long COVID, POTS - Postural Orthostatic Tachycardia Syndrome, Autonomic Dysfunction
Interventions
IL-6, cytokines (IL-17, and IFN-ɣ), Compass 31
Diagnostic Test · Behavioral
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jul 14, 2026 · Synced Sep 10, 2026, 4:24 AM EDT
Active, not recruiting Phase 1Phase 2 Interventional Accepts healthy volunteers

Treatment of Orthostatic Intolerance

NCT00262470
View directory record Official record
Conditions
Tachycardia, Chronic Orthostatic Intolerance
Interventions
Acetazolamide, Atomoxetine, NO Drug, Clonidine, Entacapone, Entacapone & Propranolol, Atomoxetine & Propranolol, Indomethacin, Mecamylamine, Isosorbide Dinitrate, Melatonin, Midodrine, Modafinil, Octreotide, Placebo, Propranolol, Modafinil & Propranolol, Sertraline, IV Saline, Drinking Water, Breathing Device, memantine, Abdominal binder
Drug · Other · Dietary Supplement + 3 more
Lead sponsor
Satish R. Raj
Other
Eligibility
18 Years to 70 Years
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1997 – 2029
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 7, 2025 · Synced Sep 10, 2026, 4:24 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Hypnosis in Autonomic Function

NCT00061009
View directory record Official record
Conditions
Vasovagal Syncope, Postural Tachycardia Syndrome, Hypnosis
Interventions
Not listed
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
Not listed
Enrollment
93 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2006
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Sep 10, 2026, 4:24 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Mechanisms of Arterial Hypotension in Chronic Spinal Cord Injury

NCT02154412
View directory record Official record
Conditions
Spinal Cord Injury
Interventions
Respiratory Training
Other
Lead sponsor
University of Louisville
Other
Eligibility
18 Years and older
Enrollment
1 participant
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2019
U.S. locations
1
States / cities
Louisville, Kentucky
Source: ClinicalTrials.gov public record
Updated Mar 6, 2025 · Synced Sep 10, 2026, 4:24 AM EDT
Not listed Phase 1 Interventional Accepts healthy volunteers

Reducing Orthostatic Intolerance With Oral Rehydration in Myalgic Encephalomyelitis/Chronic Fatigue Syndrome Patients

NCT02854683
View directory record Official record
Conditions
Chronic Fatigue Syndrome, Myalgic Encephalomyelitis, Systemic Exertion Intolerance Disease (SEID), Postural Tachycardia Syndrome (POTS), Neurally Mediated Syncope (NMS)
Interventions
Normal Saline, Oral Rehydration Solution
Drug · Dietary Supplement
Lead sponsor
New York Medical College
Other
Eligibility
15 Years to 29 Years
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2021
U.S. locations
1
States / cities
Hawthorne, New York
Source: ClinicalTrials.gov public record
Updated Jun 9, 2021 · Synced Sep 10, 2026, 4:24 AM EDT
Recruiting Not applicable Interventional

The Effect of Transcutaneous Stimulation on Blood Pressure in Spinal Cord Injury (SCI)

NCT05725499
View directory record Official record
Conditions
Spinal Cord Injuries, Hypotension, Orthostatic Hypotension, Spinal Cord Diseases, Cardiovascular Diseases, Trauma, Nervous System, Central Nervous System Diseases, Nervous System Diseases, Blood Pressure
Interventions
Biostim-5 transcutaneous spinal stimulator, Tilt-table orthostatic stress testing
Device · Diagnostic Test
Lead sponsor
Kessler Foundation
Other
Eligibility
18 Years to 75 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
West Orange, New Jersey
Source: ClinicalTrials.gov public record
Updated Sep 1, 2025 · Synced Sep 10, 2026, 4:24 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Cardiovascular Autonomic and Immune Mechanism of Post COVID-19 Tachycardia Syndrome

NCT05421208
View directory record Official record
Conditions
Post-acute COVID-19 Syndrome, Postural Tachycardia Syndrome (POTS), Long COVID, SARS CoV 2 Infection
Interventions
Levels of inflammatory cytokine ( IL-6) in post-COVID-19 POTS and controls, Levels of inflammatory cytokine ( IL-6) in controls, Effect on inflammation after chronic PNS stimulation
Diagnostic Test
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jul 14, 2026 · Synced Sep 10, 2026, 4:24 AM EDT
Completed Phase 4 Interventional

Propranolol to Treat Fainting Due to Sympathoadrenal Imbalance

NCT00060866
View directory record Official record
Conditions
Neurocardiogenic Syncope
Interventions
Propranolol
Drug
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
Not listed
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2005
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Sep 10, 2026, 4:24 AM EDT
Completed Phase 1 Interventional

Effect of Stellate Ganglion Block on ME/CFS

NCT05664711
View directory record Official record
Conditions
Encephalomyelitis, Myalgic, Chronic Fatigue Syndrome, Chronic Fatigue Disorder, Chronic Fatigue and Immune Dysfunction Syndrome, Myalgic Encephalomyelitis, Postviral Fatigue Syndrome, Systemic Exertion Intolerance Disease, Infectious Mononucleosis-Like Syndrome, Chronic, Chronic Fatigue-Fibromyalgia Syndrome
Interventions
Bupivacaine Injection
Drug
Lead sponsor
Neuroversion, Inc.
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Anchorage, Alaska
Source: ClinicalTrials.gov public record
Updated Dec 5, 2024 · Synced Sep 10, 2026, 4:24 AM EDT
Recruiting No phase listed Observational

Screening Study for KIT D816V Mutated Mast Cell Disease in Select Populations

NCT07143669
View directory record Official record
Conditions
Clonal Mast Cell Disease, KIT D816V Mutation, Suspected KITD816V Mutated Clonal Mast Cell Disease
Interventions
Screening
Other
Lead sponsor
Blueprint Medicines Corporation
Industry
Eligibility
18 Years and older
Enrollment
750 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
22
States / cities
Birmingham, Alabama • San Diego, California • Walnut Creek, California + 18 more
Source: ClinicalTrials.gov public record
Updated Aug 11, 2026 · Synced Sep 10, 2026, 4:24 AM EDT
Completed Phase 2 Interventional Results available

Efficacy and Safety Study of Efgartigimod in Adults With Post-COVID-19 POTS

NCT05633407
View directory record Official record
Conditions
Postural Orthostatic Tachycardia Syndrome
Interventions
Efgartigimod, Placebo
Drug
Lead sponsor
argenx
Industry
Eligibility
18 Years and older
Enrollment
53 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
11
States / cities
La Jolla, California • Palo Alto, California • Glenview, Illinois + 8 more
Source: ClinicalTrials.gov public record
Updated May 22, 2025 · Synced Sep 10, 2026, 4:24 AM EDT
Recruiting Not applicable Interventional

Effects of Whole-body Electrical Muscle Stimulation Exercise on Adults With Neuromuscular Disease

NCT07478172
View directory record Official record
Conditions
Neuromuscular Diseases (NMD), Amyotrophic Lateral Sclerosis, Myasthenia Gravis, Lambert-eaton Myasthenic Syndrome, Primary Lateral Sclerosis, Spinal Muscular Atrophy, Charcot Marie Tooth Disease (CMT), Fascioscapulohumeral Muscular Dystrophy, Inclusion Body Myositis, Mitochondrial Myopathy, Nemaline Myopathy, Centronuclear Myopathy, Postpolio Syndrome, Pompe Disease (Late-onset), Chronic Inflammatory Demyelinating Polyneuropathy, Hereditary Spastic Paraplegia, Postural Orthostatic Tachycardia Syndrome (POTS), Progressive Muscular Atrophy
Interventions
Whole-body Electrical Muscle Stimulation Exercise
Device
Lead sponsor
University of Missouri-Columbia
Other
Eligibility
18 Years and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2031
U.S. locations
1
States / cities
Columbia, Missouri
Source: ClinicalTrials.gov public record
Updated Mar 16, 2026 · Synced Sep 10, 2026, 4:24 AM EDT
Recruiting Not applicable Interventional

The Long COVID-19 Wearable Device Study

NCT05741112
View directory record Official record
Conditions
Long COVID, Postural Orthostatic Tachycardia Syndrome, Dysautonomia, Myalgic Encephalomyelitis, Chronic Fatigue Syndrome, Long Covid19
Interventions
Wearable device
Device
Lead sponsor
Scripps Translational Science Institute
Other
Eligibility
18 Years and older
Enrollment
100,500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated May 10, 2025 · Synced Sep 10, 2026, 4:24 AM EDT
Completed Not applicable Interventional

VNS for Long-COVID-19

NCT05630040
View directory record Official record
Conditions
Post-COVID-19 Syndrome, Postural Tachycardia Syndrome, Dysautonomia
Interventions
Non-invasive vagus nerve stimulation, Sham Intervention
Device
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Nov 7, 2024 · Synced Sep 10, 2026, 4:24 AM EDT
Completed No phase listed Observational Accepts healthy volunteers

Evaluation of Chronic Orthostatic Intolerance

NCT00069693
View directory record Official record
Conditions
Syncope
Interventions
Not listed
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
10 Years and older
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2008
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Sep 10, 2026, 4:24 AM EDT
Completed No phase listed Observational

Head Circumference Growth in Children With Ehlers-Danlos Syndrome Who Develop Dysautonomia Later in Life

NCT01367977
View directory record Official record
Conditions
Ehlers Danlos Syndrome, External Hydrocephalus, Dysautonomia, Postural Orthostatic Tachycardia Syndrome, Venous Insufficiency
Interventions
Not listed
Lead sponsor
Genetic Disease Investigators
Other
Eligibility
5 Years and older
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
1
States / cities
Colleyville, Texas
Source: ClinicalTrials.gov public record
Updated Feb 13, 2024 · Synced Sep 10, 2026, 4:24 AM EDT