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Showing 1–24 of 115 matching trials from the live ClinicalTrials.gov search.
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Not yet recruiting Phase 4 Interventional

A Randomized, Placebo-controlled Trial of Nitrous Oxide During In-office Bladder Botox Injections

NCT07387315
View directory record Official record
Conditions
Overactive Bladder, Neurogenic Bladder, Urge Incontinence, Pain, Urinary Incontinence, Urinary Bladder, Overactive, Urinary Bladder, Neurogenic, Urinary Bladder Neurogenesis, Urinary Incontinence, Urge, Pelvic Floor Disorders
Interventions
Pro-Nox Nitrous Oxide/Oxygen Delivery System, Standard Care for Bladder Botox Injection, Sham Mask
Drug · Other
Lead sponsor
TriHealth Inc.
Other
Eligibility
18 Years and older · Female only
Enrollment
96 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
2
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 3, 2026 · Synced Sep 1, 2026, 9:55 AM EDT
Withdrawn Phase 4 Interventional

Early iNO for Oxidative Stress, Vascular Tone and Inflammation in Babies With Hypoxic Respiratory Failure

NCT01891500
View directory record Official record
Conditions
Persistent Fetal Circulation Syndrome, Hypertension, Pulmonary, of Newborn, Persistent, Persistent Pulmonary Hypertension of Newborn
Interventions
Inhaled nitric oxide, Nitrogen Gas, Crossover iNO
Drug
Lead sponsor
University of Florida
Other
Eligibility
30 Minutes to 48 Hours
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Jan 6, 2020 · Synced Sep 1, 2026, 9:55 AM EDT
Completed Not applicable Interventional

Hyperbaric Oxygen Therapy for Post-Concussion Syndrome

NCT05643482
View directory record Official record
Conditions
Post-Concussion Syndrome
Interventions
Hyperbaric Oxygen Treatment, Placebo gas
Device · Other
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years to 65 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Oct 13, 2025 · Synced Sep 1, 2026, 9:55 AM EDT
Withdrawn Phase 2 Interventional

iNOPulse for COVID-19

NCT04398290
View directory record Official record
Conditions
COVID-19, Hypoxemia, Hypoxemic Respiratory Failure
Interventions
Inhaled nitric oxide (iNO), Nitrogen gas, Oxygen gas
Drug
Lead sponsor
Roger Alvarez
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Aug 18, 2020 · Synced Sep 1, 2026, 9:55 AM EDT
Completed Phase 2 Interventional Results available

Nitric Oxide to Treat Pulmonary Embolism

NCT01939301
View directory record Official record
Conditions
Pulmonary Embolism
Interventions
Inhaled Nitric Oxide, Sham
Drug
Lead sponsor
Indiana University
Other
Eligibility
18 Years and older
Enrollment
78 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
4
States / cities
Indianapolis, Indiana • Jackson, Mississippi
Source: ClinicalTrials.gov public record
Updated Oct 2, 2018 · Synced Sep 1, 2026, 9:55 AM EDT
Recruiting Early Phase 1 Interventional

TEAPOT Study Multisite

NCT07565753
View directory record Official record
Conditions
Hemorrhage, Surgical, Tonsillar Bleeding
Interventions
Tranexamic Acid Injectable Product, Normal Saline
Drug · Other
Lead sponsor
The University of Texas Health Science Center at San Antonio
Other
Eligibility
2 Years to 17 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
3
States / cities
Davis, California • Providence, Rhode Island • San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Jul 16, 2026 · Synced Sep 1, 2026, 9:55 AM EDT
Not yet recruiting Phase 4 Interventional Accepts healthy volunteers

Central Apnea in Heart Failure: Physiological Mechanisms to Inform Treatment

NCT07210606
View directory record Official record
Conditions
Sleep Disordered Breathing, Able Bodied
Interventions
Trazodone + PAP therapy, Oxygen + PAP therapy
Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years and older
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2030
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Jan 6, 2026 · Synced Sep 1, 2026, 9:55 AM EDT
Terminated Phase 2Phase 3 Interventional Results available

Clinical Trial to Evaluate the Safety and Tolerability of Hydrogen in Patients With Parkinson's Disease

NCT03971617
View directory record Official record
Conditions
Parkinson Disease
Interventions
Hydrogen, Placebo oral tablet
Drug
Lead sponsor
Stony Brook University
Other
Eligibility
40 Years to 80 Years
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Stony Brook, New York
Source: ClinicalTrials.gov public record
Updated Apr 11, 2023 · Synced Sep 1, 2026, 9:55 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Diesel Exhaust and Vascular Function

NCT01508637
View directory record Official record
Conditions
Cardiovascular Effects
Interventions
Diesel Exhaust, Filtered Air, Terazosin, placebo
Other · Drug
Lead sponsor
University of Washington
Other
Eligibility
18 Years to 49 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2015
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Aug 2, 2015 · Synced Sep 1, 2026, 9:55 AM EDT
Completed Not applicable Interventional Results available

Assessment of Arformoterol for Chronic Obstructive Pulmonary Disease (COPD) Using Hyperpolarized 3He MRI

NCT00846287
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease
Interventions
Hyperpolarized Helium-3, Placebo, Aformoterol
Drug
Lead sponsor
University of Massachusetts, Worcester
Other
Eligibility
50 Years and older
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
1
States / cities
Worcester, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 31, 2012 · Synced Sep 1, 2026, 9:55 AM EDT
Withdrawn Phase 2 Interventional Accepts healthy volunteers

Antidepressant Effects of Nitrous Oxide

NCT05357040
View directory record Official record
Conditions
Major Depressive Disorder, Treatment Resistant Depression
Interventions
Nitrous oxide gas for inhalation, Placebo
Drug
Lead sponsor
University of Chicago
Other
Eligibility
18 Years and older
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 13, 2026 · Synced Sep 1, 2026, 9:55 AM EDT
Completed Phase 2 Interventional

Effects of Alcohol History on Effects of Sevoflurane and Nitrous Oxide - 13

NCT00000261
View directory record Official record
Conditions
Alcohol-Related Disorders, Opioid-Related Disorders, Substance-Related Disorders
Interventions
30% Nitrous oxide, Placebo, 0.2% sevoflurane, 0.4% sevoflurane, 0.6% sevoflurane
Drug · Other
Lead sponsor
University of Chicago
Other
Eligibility
Not listed
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1997 – 1998
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 26, 2015 · Synced Sep 1, 2026, 9:55 AM EDT
Withdrawn Phase 2 Interventional

N2O for Acute Suicidality and Depression in the ED

NCT05710887
View directory record Official record
Conditions
Suicidal Ideation, Major Depressive Disorder, Treatment Resistant Depression
Interventions
Nitrous oxide gas for inhalation, Placebo
Drug
Lead sponsor
University of Chicago
Other
Eligibility
18 Years to 65 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Mar 3, 2026 · Synced Sep 1, 2026, 9:55 AM EDT
Completed Phase 1 Interventional

Glycemic Effect of Diazoxide in NAFLD

NCT05729282
View directory record Official record
Conditions
Hyperinsulinemia, Insulin Resistance, Non-Alcoholic Fatty Liver Disease, Prediabetic State
Interventions
Diazoxide oral suspension, 1 mg per kg per dose, Diazoxide oral suspension, 2 mg per kg per dose, Placebo, FreeStyle Libre Pro, Deuterated water (2H2O/D2O)
Drug · Device
Lead sponsor
Columbia University
Other
Eligibility
18 Years to 70 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 6, 2026 · Synced Sep 1, 2026, 9:55 AM EDT
Not listed Phase 2 Interventional

A Study to Assess Pulsed Inhaled Nitric Oxide in Subjects With Pulmonary Hypertension Associated With Pulmonary Fibrosis

NCT05747508
View directory record Official record
Conditions
Pulmonary Fibrosis, Pulmonary Hypertension
Interventions
INOpulse®, Placebo, Long Term Follow Up
Combination Product
Lead sponsor
Bellerophon
Industry
Eligibility
18 Years to 85 Years
Enrollment
85 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2023
U.S. locations
23
States / cities
Phoenix, Arizona • Los Angeles, California • Sacramento, California + 19 more
Source: ClinicalTrials.gov public record
Updated Feb 27, 2023 · Synced Sep 1, 2026, 9:55 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Sevoflurane vs Nitrous Oxide Inhalation at Subanesthetic Concentrations - 11

NCT00000259
View directory record Official record
Conditions
Opioid-Related Disorders, Substance-Related Disorders
Interventions
15 % Nitrous oxide, 0.3 % Sevoflurane, 30% Nitrous oxide, 0.6% Sevoflurane, Placebo
Drug · Other
Lead sponsor
University of Chicago
Other
Eligibility
21 Years to 39 Years
Enrollment
12 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1996 – 1997
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 27, 2015 · Synced Sep 1, 2026, 9:55 AM EDT
Completed Phase 2 Interventional Results available

Identifying and Treating Arousal Related Deficits in Neglect and Dysphagia

NCT01085903
View directory record Official record
Conditions
Spatial Neglect, Dysphagia
Interventions
Modafinil, Placebo, Baseline, CPS, Post CPS, Follow up
Drug · Behavioral
Lead sponsor
University of Arkansas
Other
Eligibility
19 Years to 85 Years
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2015
U.S. locations
2
States / cities
Conway, Arkansas • Little Rock, Arkansas
Source: ClinicalTrials.gov public record
Updated Oct 17, 2016 · Synced Sep 1, 2026, 9:55 AM EDT
Recruiting Early Phase 1 Interventional

A Trial of Self-Adjusted Nitrous Versus Placebo During Office Vasectomy

NCT07245628
View directory record Official record
Conditions
Vasectomy
Interventions
Nitrous Oxide, Oxygen
Drug
Lead sponsor
Alexandra J. Berger Eberhardt, MD
Other
Eligibility
18 Years to 85 Years · Male only
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2030
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 23, 2025 · Synced Sep 1, 2026, 9:55 AM EDT
Withdrawn Early Phase 1 Interventional

S-Nitrosylation Therapy of COVID-19

NCT04528771
View directory record Official record
Conditions
SARS-CoV2 Infection, Covid19
Interventions
SNO, Nitrogen gas
Drug
Lead sponsor
James Reynolds
Other
Eligibility
18 Years to 89 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2025
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated May 6, 2025 · Synced Sep 1, 2026, 9:55 AM EDT
Recruiting Phase 3 Interventional

NO During CPB in Neonates to Reduce Risk of AKI

NCT04216927
View directory record Official record
Conditions
AKI, CHD - Congenital Heart Disease, Surgery
Interventions
Nitric Oxide, Oxygen
Drug
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
1 Day to 31 Days
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Aug 4, 2026 · Synced Sep 1, 2026, 9:55 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

A Study on Intestinal Gas Symptoms to Evaluate the Effects of Gas Defense in Otherwise Healthy Adult

NCT00881322
View directory record Official record
Conditions
Abdominal Pain, Abdominal Cramps, Flatulence
Interventions
BC-130 (Gas Defense), Placebo
Dietary Supplement
Lead sponsor
Miami Research Associates
Network
Eligibility
18 Years to 75 Years
Enrollment
61 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Sep 29, 2009 · Synced Sep 1, 2026, 9:55 AM EDT
Withdrawn Phase 3 Interventional

Study of PAH Subjects With LTOT Use That Have Demonstrated Improved Exercise Tolerance With the Use of Inhaled Nitric

NCT03602781
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
Placebo, iNO
Drug
Lead sponsor
Bellerophon Pulse Technologies
Industry
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
2
States / cities
Chicago, Illinois • Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Feb 20, 2023 · Synced Sep 1, 2026, 9:55 AM EDT
Completed Phase 2 Interventional

Two-Part Dose-Confirming Study of Pulsed Inhaled Nitric Oxide in Subjects With WHO Group 3 Pulmonary Hypertension Associated With COPD

NCT01728220
View directory record Official record
Conditions
Pulmonary Hypertension, Chronic Obstructive Pulmonary Disease
Interventions
Inhaled NO delivered via INOpulse DS-C Device, Placebo delivered via INOpulse DS-C Device
Combination Product
Lead sponsor
Bellerophon Pulse Technologies
Industry
Eligibility
40 Years to 80 Years
Enrollment
159 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
43
States / cities
Jasper, Alabama • Flagstaff, Arizona • Phoenix, Arizona + 35 more
Source: ClinicalTrials.gov public record
Updated Feb 26, 2023 · Synced Sep 1, 2026, 9:55 AM EDT
Completed Phase 2 Interventional Results available

YF476 in Barrett's Esophagus

NCT02597712
View directory record Official record
Conditions
Barrett's Esophagus
Interventions
YF476, YF476 placebo
Drug
Lead sponsor
Trio Medicines Ltd.
Industry
Eligibility
18 Years and older
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2017
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 11, 2021 · Synced Sep 1, 2026, 9:55 AM EDT