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Showing 1–24 of 76 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Vasodilation Clear all
Completed Phase 1 Interventional Accepts healthy volunteers

Vascular Effects of Endothelium-Derived Versus Hemoglobin-Transported Nitric Oxide in Healthy Subjects

NCT00001963
View directory record Official record
Conditions
Diabetes Mellitus, Healthy, Hypercholesterolemia, Hypertension
Interventions
hemoglobin-transported nitric oxide
Procedure
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
Not listed
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1999 – 2000
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Sep 5, 2026, 4:39 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Endothelial Dysfunction After SCI

NCT07227727
View directory record Official record
Conditions
Spinal Cord Injuries, Endothelial Dysfunction
Interventions
Intra-arterial Infusion of Vasoactive Agents, Intra-arterial Vitamin C Infusion, Blood Sampling
Procedure
Lead sponsor
Craig Hospital
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Englewood, Colorado
Source: ClinicalTrials.gov public record
Updated Nov 13, 2025 · Synced Sep 5, 2026, 4:39 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

The Iowa ACEs and Sleep Cohort and Manipulating Sleep in Young Adults With ACEs Studies

NCT06454344
View directory record Official record
Conditions
Adverse Childhood Experiences, Vascular Dilatation, Sleep, Sleep Disturbance, Psychosocial Stressor, Psychological Trauma, Endothelial Dysfunction, Inflammation, Oxidative Stress
Interventions
Cognitive Behavioral Therapy for Insomnia (CBT-i)
Behavioral
Lead sponsor
Nathaniel Jenkins
Other
Eligibility
18 Years to 29 Years
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2028
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Dec 10, 2025 · Synced Sep 5, 2026, 4:39 PM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers Results available

The Impact of Free Fatty Acid Reduction on Vascular Function in the Metabolic Syndrome

NCT00759291
View directory record Official record
Conditions
Metabolic Syndrome
Interventions
acipimox, Placebo
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years and older
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2017
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 20, 2023 · Synced Sep 5, 2026, 4:39 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Safety Study of Dantrolene to Treat Cerebral Vasospasm After Subarachnoid Hemorrhage

NCT00964548
View directory record Official record
Conditions
Cerebral Vasospasm After Subarachnoid Hemorrhage
Interventions
Dantrolene
Drug
Lead sponsor
University of Massachusetts, Worcester
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
2
States / cities
Boston, Massachusetts • Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 24, 2012 · Synced Sep 5, 2026, 4:39 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Nitrate Supplementation and Muscle Blood Flow

NCT03459027
View directory record Official record
Conditions
Vasodilation, Blood Pressure, Active Hyperemia, Aging
Interventions
Super Beets, Beetroot powder
Dietary Supplement
Lead sponsor
University of Iowa
Other
Eligibility
60 Years to 80 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Jan 8, 2019 · Synced Sep 5, 2026, 4:39 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Effect of DPP4 Inhibition on Growth Hormone Secretion

NCT01701973
View directory record Official record
Conditions
Obesity
Interventions
Sitagliptin, Pegvisomant, Placebo, L-NMMA, Exendin 9-39
Drug
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years to 40 Years
Enrollment
44 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2017
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated May 28, 2018 · Synced Sep 5, 2026, 4:39 PM EDT
Completed Phase 2 Interventional

STRETCH Study: Effect of Distensibility on Endothelial-Dependent Vasoreactivity in Patients With ISH

NCT00277875
View directory record Official record
Conditions
Cardiovascular Disease
Interventions
ALT-711 (alagebrium chloride)
Drug
Lead sponsor
Synvista Therapeutics, Inc
Industry
Eligibility
50 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2006
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 26, 2009 · Synced Sep 5, 2026, 4:39 PM EDT
Withdrawn Phase 3 Interventional

Study to Assess Acute Vasodilation Response of Inhaled Nitric Oxide

NCT02436512
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
Inhaled Nitric Oxide
Drug
Lead sponsor
Geno LLC
Industry
Eligibility
18 Years to 70 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015
U.S. locations
2
States / cities
Birmingham, Alabama • Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 6, 2015 · Synced Sep 5, 2026, 4:39 PM EDT
Completed Not applicable Interventional

Does Blood Vessel Vasodilation, Caused by Focal Infiltration of Lidocaine Cause Temporary Nerve Functional Recovery for Patients with Common Peroneal Nerve Injury or Entrapment: Testing the 'Phoenix Sign' Effect Between Lidocaine (a Common Local Anesthetic) and Papaverine, a Know Vasodilator

NCT06637046
View directory record Official record
Conditions
Drop Foot
Interventions
Diagnostic procedures, Lidocaine HCl
Diagnostic Test
Lead sponsor
Stephen Barrett
Other
Eligibility
18 Years to 85 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
1
States / cities
Marietta, Georgia
Source: ClinicalTrials.gov public record
Updated Oct 14, 2024 · Synced Sep 5, 2026, 4:39 PM EDT
Recruiting Not applicable Interventional

Red Light Treatment in Peripheral Artery Disease

NCT03203239
View directory record Official record
Conditions
Peripheral Artery Disease, Claudication, Intermittent, Vasodilation
Interventions
Red Light (670 nm energy), Octafluoropropane
Device · Drug
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
18 Years to 85 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2028
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Apr 30, 2026 · Synced Sep 5, 2026, 4:39 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Radial Artery Dilation Study: The Effect of Topical Administration of Nitroglycerin and Lidocaine Versus Lidocaine Alone of the Radial Artery Diameter

NCT00686231
View directory record Official record
Conditions
Healthy
Interventions
Nitroglycerin 15mg, Nitroglycerin 30mg, Lidocaine 20mg, Lidocaine 40mg, Placebo
Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 35 Years
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Mar 5, 2020 · Synced Sep 5, 2026, 4:39 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Evaluation of Sports Supplements on Blood Flow

NCT04278053
View directory record Official record
Conditions
Determine the Effects of Nitrosigine and Citrulline-malate on Flow-mediated Dilation Among Young Adults
Interventions
inositol-stabilized arginine silicate
Dietary Supplement
Lead sponsor
University of Arkansas, Fayetteville
Other
Eligibility
18 Years to 29 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Fayetteville, Arkansas
Source: ClinicalTrials.gov public record
Updated May 23, 2022 · Synced Sep 5, 2026, 4:39 PM EDT
Terminated Phase 1 Interventional Accepts healthy volunteers

Peripheral Vasodilation in Obese Humans

NCT02833207
View directory record Official record
Conditions
Obesity
Interventions
Drug Trial 1 (EDD), Drug Trial 2 (ROV)
Drug
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years to 40 Years
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2021
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Feb 10, 2022 · Synced Sep 5, 2026, 4:39 PM EDT
Completed No phase listed Observational

Blood Vessel Function in HIV-Infected Patients Taking Anti-HIV Drugs

NCT00050908
View directory record Official record
Conditions
HIV Infections
Interventions
Not listed
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
13 Years and older
Enrollment
75 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Ends 2007
U.S. locations
9
States / cities
Los Angeles, California • San Diego, California • Honolulu, Hawaii + 4 more
Source: ClinicalTrials.gov public record
Updated Jul 28, 2013 · Synced Sep 5, 2026, 4:39 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Stable Sleep Pattern Before Sleep Loss

NCT06201390
View directory record Official record
Conditions
Sleep
Interventions
Sleep consistency
Behavioral
Lead sponsor
Texas Tech University
Other
Eligibility
35 Years to 64 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Lubbock, Texas
Source: ClinicalTrials.gov public record
Updated Mar 24, 2025 · Synced Sep 5, 2026, 4:39 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Long Sleep Duration and Vascular Function

NCT04679051
View directory record Official record
Conditions
Sleep
Interventions
Sleep duration
Behavioral
Lead sponsor
Texas Tech University
Other
Eligibility
40 Years to 79 Years
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Lubbock, Texas
Source: ClinicalTrials.gov public record
Updated Jan 12, 2023 · Synced Sep 5, 2026, 4:39 PM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

Model System for Transient Forearm Blood Vessel Dysfunction

NCT00453531
View directory record Official record
Conditions
Limb Ischemia, Ischemic Preconditioning
Interventions
Limb Ischemia, Acetylcholine
Procedure · Drug
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
18 Years to 45 Years · Male only
Enrollment
6 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2009
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 8, 2022 · Synced Sep 5, 2026, 4:39 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Chardonnay Marc and Vascular Response

NCT05545865
View directory record Official record
Conditions
Cardiovascular Diseases, Vascular Dilation, Oxidative Stress
Interventions
Low Flavanol Cocoa Powder, High Flavanol Cocoa Powder, Vine to Bar Chocolate - 2 servings, Vine to Bar Chocolate - 1 serving, Vine to Bar Chocolate covered almonds
Other
Lead sponsor
University of California, Davis
Other
Eligibility
30 Years to 50 Years · Male only
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2026
U.S. locations
1
States / cities
Davis, California
Source: ClinicalTrials.gov public record
Updated Feb 17, 2026 · Synced Sep 5, 2026, 4:39 PM EDT
Completed Phase 1 Interventional

Therapeutic Application of Intravascular Nitrite for Sickle Cell Disease

NCT00095472
View directory record Official record
Conditions
Sickle Cell Anemia
Interventions
L-NMMA, Sodium Nitrite
Drug
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
18 Years and older
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2007
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Nov 4, 2019 · Synced Sep 5, 2026, 4:39 PM EDT
Withdrawn Phase 3 Interventional

Effects of Pulmonary Vasodilation Upon VA Coupling in Fontan Patients

NCT01607983
View directory record Official record
Conditions
Congenital Heart Disease, Fontan
Interventions
inhaled nitric oxide
Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
4 Years to 60 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2017
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated May 3, 2018 · Synced Sep 5, 2026, 4:39 PM EDT
Recruiting No phase listed Observational

Testosterone Deficiency and Endothelial Dysfunction After Spinal Cord Injury

NCT07227740
View directory record Official record
Conditions
Spinal Cord Injuries, Endothelial Dysfunction, Testosterone Deficiency
Interventions
Intra-arterial Infusion of Vasoactive Agents, Intra-arterial Vitamin C Infusion, Blood Sampling
Diagnostic Test
Lead sponsor
Craig Hospital
Other
Eligibility
18 Years to 89 Years · Male only
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
1
States / cities
Englewood, Colorado
Source: ClinicalTrials.gov public record
Updated Nov 20, 2025 · Synced Sep 5, 2026, 4:39 PM EDT
Terminated Early Phase 1 Interventional Accepts healthy volunteers

Targeting ER Stress in Vascular Dysfunction

NCT04001647
View directory record Official record
Conditions
Vasodilation, Arterial Stiffness
Interventions
Acetylcholine, Sodium Nitroprusside, Ascorbic Acid
Drug
Lead sponsor
Colorado State University
Other
Eligibility
18 Years to 80 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
1
States / cities
Fort Collins, Colorado
Source: ClinicalTrials.gov public record
Updated Apr 7, 2025 · Synced Sep 5, 2026, 4:39 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Pyridoxine, P2 Receptor Antagonism, and ATP-mediated Vasodilation in Young Adults

NCT03738943
View directory record Official record
Conditions
Receptor Blockade
Interventions
Adenosine Triphosphate, Acetylcholine, Sodium Nitroprusside, Adenosine Diphosphate, Adenosine Monophosphate, Uridine Triphosphate, Adenosine, Vitamin B 6, Pyridoxal 5'-Phosphate
Drug
Lead sponsor
Colorado State University
Other
Eligibility
18 Years to 30 Years
Enrollment
9 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Fort Collins, Colorado
Source: ClinicalTrials.gov public record
Updated Jul 26, 2021 · Synced Sep 5, 2026, 4:39 PM EDT