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ClinicalTrials.gov public records Last synced Oct 16, 2026, 10:42 AM EDT

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Showing 1–24 of 115 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Placebo gas Clear all
Completed Phase 1Phase 2 Interventional Results available

Inhaled NO as an Anti-inflammatory and Anti-reperfusion Agent in Infants and Children Undergoing Cardiopulmonary Bypass

NCT00585013
View directory record Official record
Conditions
Congenital Heart Disease
Interventions
Nitric Oxide
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
Up to 16 Years
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Nov 4, 2015 · Synced Oct 16, 2026, 10:42 AM EDT
Completed Phase 2 Interventional

The Effect of Nasal Carbon Dioxide (CO2) in the Symptomatic Treatment of Seasonal Allergic Rhinitis

NCT00917111
View directory record Official record
Conditions
Seasonal Allergic Rhinitis
Interventions
Nasal CO2, Inactive Placebo Gas
Drug
Lead sponsor
Capnia, Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009
U.S. locations
1
States / cities
Omaha, Nebraska
Source: ClinicalTrials.gov public record
Updated Aug 15, 2012 · Synced Oct 16, 2026, 10:42 AM EDT
Completed Phase 2 Interventional Results available

Nitric Oxide Inhalation to Treat Sickle Cell Pain Crises

NCT00094887
View directory record Official record
Conditions
Anemia, Sickle Cell
Interventions
Nitric Oxide, Placebo
Drug
Lead sponsor
Mallinckrodt
Industry
Eligibility
10 Years and older
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2008
U.S. locations
11
States / cities
Birmingham, Alabama • Oakland, California • Aurora, Colorado + 7 more
Source: ClinicalTrials.gov public record
Updated Feb 5, 2020 · Synced Oct 16, 2026, 10:42 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of CharcoCaps® (Activated Charcoal) vs. Placebo on Intestinal Gas Production

NCT05510778
View directory record Official record
Conditions
Intestinal Gas
Interventions
Charcocaps, Placebo
Dietary Supplement · Other
Lead sponsor
University of Memphis
Other
Eligibility
18 Years to 65 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated Aug 22, 2022 · Synced Oct 16, 2026, 10:42 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Ergogenic Effects of Sportlegs

NCT06371521
View directory record Official record
Conditions
Performance Enhancing Product Use
Interventions
Sportlegs, Placebo
Dietary Supplement
Lead sponsor
Christopher Bell
Other
Eligibility
18 Years to 30 Years
Enrollment
19 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024
U.S. locations
1
States / cities
Fort Collins, Colorado
Source: ClinicalTrials.gov public record
Updated Jul 12, 2024 · Synced Oct 16, 2026, 10:42 AM EDT
Completed Phase 3 Interventional Results available

Inhaled Nitric Oxide (INO) for the Prevention of Bronchopulmonary Dysplasia (BPD) in Preterm Infants

NCT00931632
View directory record Official record
Conditions
Bronchopulmonary Dysplasia
Interventions
Inhaled Nitric Oxide, Placebo
Drug
Lead sponsor
Mallinckrodt
Industry
Eligibility
5 Days to 14 Days
Enrollment
451 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2014
U.S. locations
31
States / cities
Phoenix, Arizona • Loma Linda, California • Orange, California + 26 more
Source: ClinicalTrials.gov public record
Updated Dec 4, 2017 · Synced Oct 16, 2026, 10:42 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Apneic Oxygenation With a Nasal Cannula in the Obese and Morbidly Obese Surgical Patient

NCT03671837
View directory record Official record
Conditions
Apneic; Oxygenation
Interventions
Oxygen, Air
Other
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years to 80 Years
Enrollment
135 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Mar 11, 2020 · Synced Oct 16, 2026, 10:42 AM EDT
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 + positive airway pressure (PAP) therapy, Oxygen + positive airway pressure (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 Oct 13, 2026 · Synced Oct 16, 2026, 10:42 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 5, 2026 · Synced Oct 16, 2026, 10:42 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Role of Instructions in Nitrous Oxide Effects and Choice - 10

NCT00000258
View directory record Official record
Conditions
Opioid-Related Disorders, Substance-Related Disorders
Interventions
Nitrous oxide 10% & placebo, Nitrous oxide 20% & placebo, Nitrous oxide 30% & placebo, Nitrous oxide 40% and placebo
Drug
Lead sponsor
University of Chicago
Other
Eligibility
21 Years to 32 Years
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1996 – 1997
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 28, 2015 · Synced Oct 16, 2026, 10:42 AM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Impact of B. Adolescentis iVS-1 Probiotic on Gastrointestinal Outcomes

NCT07408518
View directory record Official record
Conditions
Digestive Disease, Gut Health
Interventions
Probiotic, Placebo
Dietary Supplement · Other
Lead sponsor
Synbiotic Health
Industry
Eligibility
18 Years to 75 Years
Enrollment
92 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Apr 1, 2026 · Synced Oct 16, 2026, 10:42 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 21, 2023 · Synced Oct 16, 2026, 10:42 AM EDT
Completed Not applicable Interventional

Effects of Combined Sevoflurane and Nitrous Oxide Inhalation - 14

NCT00000262
View directory record Official record
Conditions
Opioid-Related Disorders, Substance-Related Disorders
Interventions
30% Nitrous oxide, 0.4% Sevoflurane, 0.2% sevoflurane, Placebo
Drug · Other
Lead sponsor
University of Chicago
Other
Eligibility
Not listed
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1996 – 1999
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 27, 2015 · Synced Oct 16, 2026, 10:42 AM EDT
Completed Phase 2 Interventional Results available

A Study to Evaluate the Effect of the Transient Receptor Potential Vanilloid 4 (TRPV4) Channel Blocker, GSK2798745, on Pulmonary Gas Transfer and Respiration in Patients With Congestive Heart Failure

NCT02497937
View directory record Official record
Conditions
Heart Failure
Interventions
GSK2798745, Placebo
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
21 Years and older
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
2
States / cities
Minneapolis, Minnesota • Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Sep 5, 2018 · Synced Oct 16, 2026, 10:42 AM EDT
Completed Phase 2 Interventional Results available

Normobaric Oxygen (NBO) Therapy in Acute Migraine

NCT01542307
View directory record Official record
Conditions
Migraine
Interventions
Oxygen, Room air
Biological
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 27, 2017 · Synced Oct 16, 2026, 10:42 AM EDT
Completed Phase 4 Interventional

Inhaled Nitric Oxide by Oxygen Hood in Neonates

NCT00732537
View directory record Official record
Conditions
Respiratory Failure, Infant, Persistent Fetal Circulation
Interventions
inhaled Nitric Oxide, Oxygen (>90% by hood) - standard therapy
Drug
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
1 Hour to 1 Week
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1999 – 2005
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Aug 12, 2008 · Synced Oct 16, 2026, 10:42 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Network-Level Effects of Nitrous Oxide in the Human Brain

NCT03435055
View directory record Official record
Conditions
Healthy
Interventions
Nitrous Oxide Gas for Inhalation
Drug
Lead sponsor
University of Michigan
Other
Eligibility
21 Years to 40 Years
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Nov 30, 2021 · Synced Oct 16, 2026, 10:42 AM EDT
Recruiting Not applicable Interventional

Controlled Trial of Hydrogen Water as a Treatment for Myalgic Encephalomyelitis/Chronic Fatigue Syndrome

NCT07753122
View directory record Official record
Conditions
Chronic Fatigue Syndrome (CFS)
Interventions
Placebo condition, Molecular hydrogen produced by a metallic magnesium tablet, consumed 3x a day dissolved in water. Treatment duration is 16 weeks.
Dietary Supplement
Lead sponsor
Fred Friedberg
Other
Eligibility
18 Years to 65 Years
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Stony Brook, New York
Source: ClinicalTrials.gov public record
Updated Aug 7, 2026 · Synced Oct 16, 2026, 10:42 AM EDT
Not listed Phase 1Phase 2 Interventional

Prevention of Transfusion Related Acute Gut Injury (TRAGI) in Extremely Low Gestational Age Neonates (ELGANs) Using iNO

NCT02851472
View directory record Official record
Conditions
Anemia
Interventions
Inhaled Nitric Oxide, Placebo
Drug
Lead sponsor
New York Medical College
Other
Eligibility
2 Weeks and older
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
4
States / cities
Springfield, Massachusetts • Stony Brook, New York • Valhalla, New York + 1 more
Source: ClinicalTrials.gov public record
Updated Apr 24, 2019 · Synced Oct 16, 2026, 10:42 AM EDT
Recruiting Phase 1Phase 2 Interventional Accepts healthy volunteers

Sleep Disordered Breathing With Opioid Use

NCT05589753
View directory record Official record
Conditions
Sleep Apnea, Opioid Use, Sleep Disordered Breathing
Interventions
Hyperoxia, Acetazolamide
Other · Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years to 89 Years
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2027
U.S. locations
1
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Jul 1, 2026 · Synced Oct 16, 2026, 10:42 AM EDT
Withdrawn Phase 2Phase 3 Interventional Accepts healthy volunteers

Nitrous Oxide for Pain Management During IUD Insertion in Nulliparous Adolescent Women

NCT04089852
View directory record Official record
Conditions
Contraceptive Devices, Long-Acting Reversible Contraception, Analgesia, Adolescent Health, Gynecology
Interventions
Nitrous oxide gas for inhalation, Oxygen Gas for Inhalation
Drug
Lead sponsor
Boston Children's Hospital
Other
Eligibility
14 Years to 24 Years · Female only
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 16, 2022 · Synced Oct 16, 2026, 10:42 AM EDT
Not yet recruiting Not applicable Interventional Accepts healthy volunteers

Study to Investigate the Efficacy of a Digestive Health Dietary Supplement on Post-meal Bloating in Healthy Participants

NCT07516587
View directory record Official record
Conditions
Digestive Health, Abdominal Discomfort, Gas and Bloating
Interventions
Bloat Gummies, Placebo
Dietary Supplement
Lead sponsor
Arrae
Industry
Eligibility
18 Years to 65 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Apr 13, 2026 · Synced Oct 16, 2026, 10:42 AM EDT
Completed Phase 2Phase 3 Interventional Results available

Study to Evaluate if Inhaled Nitric Oxide Improves Liver Function After Transplantation

NCT00582010
View directory record Official record
Conditions
Reperfusion Injury, Liver Injury
Interventions
inhaled nitric oxide, nitrogen gas
Drug
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
19 Years to 80 Years
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2012
U.S. locations
2
States / cities
Birmingham, Alabama • Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Nov 6, 2014 · Synced Oct 16, 2026, 10:42 AM EDT
Completed Phase 1Phase 2 Interventional Results available

Safety and Tolerability of Inhaled Nitric Oxide in Patients With Cystic Fibrosis

NCT00570349
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
Nitric Oxide for Inhalation, Nitrogen
Drug
Lead sponsor
Mallinckrodt
Industry
Eligibility
12 Years and older
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2008
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Nov 13, 2019 · Synced Oct 16, 2026, 10:42 AM EDT