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Showing 1–24 of 50 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Nitroprusside Clear all
Active, not recruiting No phase listed Observational Accepts healthy volunteers

Estrogen and Microvascular Function

NCT06043310
View directory record Official record
Conditions
Estrogen, Cardiovascular Diseases, Microvasculature, Oral Contraceptive Use
Interventions
Nω-nitro-L-arginine methyl ester (L-NAME), Acetylcholine, Sodium Nitroprusside
Drug
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
18 Years to 40 Years · Female only
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2031
U.S. locations
1
States / cities
Wauwatosa, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jul 28, 2026 · Synced Sep 2, 2026, 4:40 PM EDT
Terminated Phase 1 Interventional Accepts healthy volunteers

Role of Adenosine in the Release of VEGF and Cytokines

NCT00580905
View directory record Official record
Conditions
Inflammation
Interventions
Adenosine, Sodium Nitroprusside
Drug
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years to 60 Years
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2017
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Feb 27, 2018 · Synced Sep 2, 2026, 4:40 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 2, 2026, 4:40 PM EDT
Recruiting No phase listed Observational Accepts healthy volunteers

Role of Endothelial Function in SCI CVD Risk

NCT06443151
View directory record Official record
Conditions
Spinal Cord Injuries, Cardiovascular Diseases, Endothelial Dysfunction
Interventions
Brachial intra-arterial infusion of vasoactive and antioxidant drugs (acetylcholine, nitroprusside, ascorbic acid), venous occlusion plethysmography, Acetylcholine, Sodium Nitroprusside, Ascorbic acid, venous phlebotomy
Procedure · Drug
Lead sponsor
Craig Hospital
Other
Eligibility
18 Years to 89 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
Englewood, Colorado
Source: ClinicalTrials.gov public record
Updated Aug 19, 2024 · Synced Sep 2, 2026, 4:40 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Chemoreflex and Baroreflex Alterations Causing Postural Tachycardia Syndrome With Orthostatic Hyperpnea and Hypocapnia

NCT05923840
View directory record Official record
Conditions
Postural Orthostatic Tachycardia Syndrome, Hypocapnia, Hyperventilation
Interventions
Chemoreflex Testing, Baroreflex testing, Orthostatic stress testing
Diagnostic Test
Lead sponsor
New York Medical College
Other
Eligibility
15 Years to 39 Years · Female only
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2024
U.S. locations
1
States / cities
Hawthorne, New York
Source: ClinicalTrials.gov public record
Updated Jun 27, 2023 · Synced Sep 2, 2026, 4:40 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 2, 2026, 4:40 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

The Effects of Anthracycline-based Chemotherapy on Peripheral Vascular Function

NCT03062878
View directory record Official record
Conditions
Breast Cancer, Lymphoma, Chemotherapy Effect
Interventions
Arterial blood pressure, Vascular Ultrasound, Venous blood sample, Skin microcirculatory blood flow
Other
Lead sponsor
Carl Ade, M.S., Ph.D.
Other
Eligibility
21 Years and older
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Manhattan, Kansas
Source: ClinicalTrials.gov public record
Updated Sep 1, 2025 · Synced Sep 2, 2026, 4:40 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

The Effect of Antioxidants on Skin Blood Flow-BH4

NCT03680573
View directory record Official record
Conditions
Cardiovascular Diseases, Cardiovascular Risk Factor, Vasoconstriction
Interventions
Control: Lacated Ringers, Apocynin, Allopurinol, BH4, NG Nitro L Arginine Methyl Ester, Sodium Nitroprusside, Acetyl-ß-methylcholine chloride
Drug
Lead sponsor
The University of Texas at Arlington
Other
Eligibility
18 Years to 35 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Arlington, Texas
Source: ClinicalTrials.gov public record
Updated Sep 25, 2018 · Synced Sep 2, 2026, 4:40 PM EDT
Recruiting Phase 1 Interventional Accepts healthy volunteers

The Impact of Gestational Diabetes Mellitus on Cerebral Blood Flow and Cerebrovascular Function After Pregnancy

NCT06911372
View directory record Official record
Conditions
Gestational Diabetes Mellitus (GDM), Postpartum Women, Uncomplicated Pregnancy
Interventions
Intradermal Microdialysis, Brain Blood Flow Tests, Local Heating
Drug · Other
Lead sponsor
Anna Stanhewicz, PhD
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
84 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2028
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Dec 15, 2025 · Synced Sep 2, 2026, 4:40 PM EDT
Recruiting Phase 1 Interventional Accepts healthy volunteers

: Vascular Function in Health and Disease

NCT02966665
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease, Pulmonary Artery Hypertension, Heart Failure, Hypertension
Interventions
Maximum Exercise Tests, BH4, L-NMMA, Vitamin C, Vitamin E, α-Lipoic Acid and L-Ascorbate, BQ-123, Fexofenadine, Ranitidine, Angiotensin-II, Valsartan, Acetylcholine, Sodium Nitroprusside, Angiotensin-II, Norepinephrine, Phentolamine, BQ-123, MitoQ, BH4
Other · Drug
Lead sponsor
Russell Richardson
Other
Eligibility
18 Years and older
Enrollment
420 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2026
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Sep 25, 2025 · Synced Sep 2, 2026, 4:40 PM EDT
Completed Not applicable Interventional

Coronary Artery Disease in Patients With Friedreich's Ataxia

NCT04649866
View directory record Official record
Conditions
Friedreich Ataxia
Interventions
plethysmography
Diagnostic Test
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years to 79 Years
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 7, 2023 · Synced Sep 2, 2026, 4:40 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Pilot Study On The Role Of Nitric Oxide In Alpha 1-Adrenergic Vasoreactivity

NCT00240058
View directory record Official record
Conditions
Blood Pressure
Interventions
Regional phenylephrine arterial infusion, Nitric Oxide Clamp
Drug
Lead sponsor
Crystal A. Gadegbeku
Other
Eligibility
18 Years to 55 Years
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2006
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jun 4, 2017 · Synced Sep 2, 2026, 4:40 PM EDT
Completed Phase 2 Interventional

Sodium Nitroprusside for Blood Pressure Reduction in the ICU (SNP2)

NCT00621816
View directory record Official record
Conditions
Hypertension
Interventions
nitroprusside, placebo infusion
Drug
Lead sponsor
Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
NIH
Eligibility
1 Day to 17 Years
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
8
States / cities
Little Rock, Arkansas • Stanford, California • Louisville, Kentucky + 4 more
Source: ClinicalTrials.gov public record
Updated Dec 5, 2011 · Synced Sep 2, 2026, 4:40 PM EDT
Completed Phase 3 Interventional

Clevidipine in the Perioperative Treatment of Hypertension (ECLISPE-SNP)

NCT00093912
View directory record Official record
Conditions
Hypertension
Interventions
clevidipine, sodium nitroprusside
Drug
Lead sponsor
The Medicines Company
Industry
Eligibility
18 Years and older
Enrollment
739 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2006
U.S. locations
29
States / cities
Birmingham, Alabama • Montgomery, Alabama • Burbank, California + 22 more
Source: ClinicalTrials.gov public record
Updated May 5, 2014 · Synced Sep 2, 2026, 4:40 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

The Role of Cyclooxygenase Activity in the Endothelial Function of Hypertensive and Hypercholesterolemic Patients

NCT00001742
View directory record Official record
Conditions
Healthy, Hypercholesterolemia, Hypertension
Interventions
Not listed
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
Not listed
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1998 – 2001
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Sep 2, 2026, 4:40 PM EDT
Withdrawn Early Phase 1 Interventional Accepts healthy volunteers

Role of Acetylcholine in Blood Flow Regulation in Healthy Adults: Effects of Age and Exercise Training

NCT03972683
View directory record Official record
Conditions
Vasoconstriction, Vasodilation
Interventions
Handgrip Exercise Training, Acetylcholine, Adenosine Triphosphate, Atropine, Phenylephrine, Sodium Nitroprusside
Other · Drug
Lead sponsor
Colorado State University
Other
Eligibility
18 Years to 85 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Fort Collins, Colorado
Source: ClinicalTrials.gov public record
Updated Aug 1, 2021 · Synced Sep 2, 2026, 4:40 PM EDT
Completed No phase listed Observational

Safety and Efficacy of Nicardipine for the Control of Blood Pressure After SAH

NCT00490464
View directory record Official record
Conditions
Subarachnoid Hemorrhage, Intracerebral Hemorrhage
Interventions
Nicardipine and Nipride
Drug
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
18 Years to 70 Years
Enrollment
163 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2007
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 21, 2007 · Synced Sep 2, 2026, 4:40 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Vasodilation in Patients With Fabry's Disease

NCT00001774
View directory record Official record
Conditions
Cerebrovascular Accident, Fabry Disease, Healthy
Interventions
Not listed
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
Male only
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1997 – 2000
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Sep 2, 2026, 4:40 PM EDT
Terminated Phase 1Phase 2 Interventional Results available

HeartPhone Cancer Survivors Trial 2019

NCT03953326
View directory record Official record
Conditions
Breast Cancer, Leukemia, Lymphoma
Interventions
HeartPhone app, Acetylcholine, Sodium Nitroprusside, L-Arginine, N2-((4-Methylphenyl)Sulfonyl)-, Methyl Ester
Behavioral · Drug
Lead sponsor
Penn State University
Other
Eligibility
18 Years to 65 Years
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
University Park, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 26, 2026 · Synced Sep 2, 2026, 4:40 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Nebivolol and the Endothelin (ET)-1 System

NCT01395329
View directory record Official record
Conditions
Prehypertension, Hypertension
Interventions
Nebivolol, Metoprolol, Placebo, Forearm Blood Flow (FBF) response to BQ-123 (100 mol/min), FBF response to BQ-123 (100 nmol/min)+BQ-788(50 nmol/min), FBF response to Acetylcholine, FBF response to Sodium Nitroprusside, FBF response to BQ-123+BQ-788+ACh
Drug · Other
Lead sponsor
University of Colorado, Boulder
Other
Eligibility
45 Years to 65 Years
Enrollment
42 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2016
U.S. locations
1
States / cities
Boulder, Colorado
Source: ClinicalTrials.gov public record
Updated Jan 1, 2019 · Synced Sep 2, 2026, 4:40 PM EDT
Completed No phase listed Observational

Ketostix® and Keto-Diastix® Performance Study

NCT06053593
View directory record Official record
Conditions
Urinalysis
Interventions
Testing of self collected urine, Labeling Evaluation, Urine Control testing
Device
Lead sponsor
Ascensia Diabetes Care
Industry
Eligibility
18 Years and older
Enrollment
126 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 28, 2024 · Synced Sep 2, 2026, 4:40 PM EDT
Recruiting Early Phase 1 Interventional Accepts healthy volunteers

Antidepressant Therapy for Improved Blood Vessel Health After Preeclampsia

NCT07715669
View directory record Official record
Conditions
Preeclampsia, Endothelial Function
Interventions
Paroxetine Hydrochloride, Ascorbic acid (Vitamin C)
Drug
Lead sponsor
Anna Stanhewicz, PhD
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Iowa City, Iowa
Source: ClinicalTrials.gov public record
Updated Jul 28, 2026 · Synced Sep 2, 2026, 4:40 PM EDT
Completed Phase 3 Interventional Results available

Clevidipine in the Treatment of Blood Pressure in Patients With Acute Heart Failure (PRONTO)

NCT00803634
View directory record Official record
Conditions
Hypertension, Heart Failure
Interventions
Clevidipine, Standard of Care IV antihypertensive
Drug
Lead sponsor
The Medicines Company
Industry
Eligibility
18 Years and older
Enrollment
117 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2012
U.S. locations
9
States / cities
Montgomery, Alabama • Inglewood, California • Baton Rouge, Louisiana + 6 more
Source: ClinicalTrials.gov public record
Updated Aug 28, 2014 · Synced Sep 2, 2026, 4:40 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

The Effect of Antioxidants on Skin Blood Flow During Local Heating

NCT03680638
View directory record Official record
Conditions
Cardiovascular Diseases, Cardiovascular Risk Factor, Vasodilation
Interventions
Control (Lactated Ringer's), Tempol, Apocynin, Allopurinol
Other · Drug
Lead sponsor
The University of Texas at Arlington
Other
Eligibility
18 Years to 35 Years
Enrollment
44 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
1
States / cities
Arlington, Texas
Source: ClinicalTrials.gov public record
Updated Sep 20, 2018 · Synced Sep 2, 2026, 4:40 PM EDT