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Showing 1–24 of 115 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Placebo Gas Clear all
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 5, 2014 · Synced Sep 6, 2026, 4:54 PM 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 6, 2026, 4:54 PM EDT
Completed Phase 2 Interventional Results available

Trial of a Gastrin Receptor Antagonist in Barrett's Esophagus

NCT01298999
View directory record Official record
Conditions
Barrett's Esophagus
Interventions
YF476, Placebo
Drug
Lead sponsor
Columbia University
Other
Eligibility
18 Years and older
Enrollment
27 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2017
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Nov 22, 2021 · Synced Sep 6, 2026, 4:54 PM 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 23, 2019 · Synced Sep 6, 2026, 4:54 PM EDT
Terminated Phase 3 Interventional

A Study to Assess Pulsed Inhaled Nitric Oxide in Subjects With Pulmonary Fibrosis at Risk for Pulmonary Hypertension

NCT03267108
View directory record Official record
Conditions
Pulmonary Fibrosis, Pulmonary Hypertension
Interventions
INOpulse®, Placebo, Open Label Extension
Combination Product
Lead sponsor
Bellerophon Pulse Technologies
Industry
Eligibility
18 Years to 80 Years
Enrollment
145 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
61
States / cities
Birmingham, Alabama • Phoenix, Arizona • Fresno, California + 49 more
Source: ClinicalTrials.gov public record
Updated Jul 26, 2023 · Synced Sep 6, 2026, 4:54 PM EDT
Recruiting Phase 4 Interventional Accepts healthy volunteers

Simethicone as Part of ERAS in Bariatric Surgery Patients

NCT06812832
View directory record Official record
Conditions
Simethicone, Bariatric Surgery, Post-operative Pain
Interventions
Simethicone 80 MG, Placebo
Drug
Lead sponsor
Madigan Army Medical Center
Federal
Eligibility
18 Years to 89 Years
Enrollment
260 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2029
U.S. locations
1
States / cities
Tacoma, Washington
Source: ClinicalTrials.gov public record
Updated Jun 14, 2025 · Synced Sep 6, 2026, 4:54 PM EDT
Recruiting Phase 1 Interventional

Effect of Insulin Lowering on Lipogenesis

NCT07403604
View directory record Official record
Conditions
Hyperinsulinemia, Insulin Resistance, Non-Alcoholic Fatty Liver Disease, Prediabetic State, Obesity
Interventions
Placebo, Diazoxide Oral Suspension, 2 mg per kg per dose, Deuterated water (2H2O/D2O), 70%, Insulin Suppression Test (IST)
Drug · Diagnostic Test
Lead sponsor
Columbia University
Other
Eligibility
18 Years to 65 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jul 5, 2026 · Synced Sep 6, 2026, 4:54 PM 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 Jun 30, 2026 · Synced Sep 6, 2026, 4:54 PM 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 6, 2026, 4:54 PM EDT
Withdrawn Phase 2 Interventional

Trial of Low-Dose Xenon For The Treatment Of Obsessive-Compulsive Disorder

NCT02098148
View directory record Official record
Conditions
Obsessive-Compulsive Disorder
Interventions
Xenon, Placebo
Drug
Lead sponsor
Mclean Hospital
Other
Eligibility
18 Years to 55 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
1
States / cities
Belmont, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 26, 2014 · Synced Sep 6, 2026, 4:54 PM EDT
Not listed Phase 1 Interventional Accepts healthy volunteers

Bacterial Overgrowth Associated With Chronic Multisymptom Illness Complex

NCT00956150
View directory record Official record
Conditions
Gulf War Syndrome
Interventions
Lactulose Breath Test, Rifaximin, Placebo
Procedure · Drug
Lead sponsor
Henry C. Lin, MD
Federal
Eligibility
21 Years and older
Enrollment
210 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2009
U.S. locations
1
States / cities
Albuquerque, New Mexico
Source: ClinicalTrials.gov public record
Updated Apr 30, 2013 · Synced Sep 6, 2026, 4:54 PM EDT
Completed Phase 2Phase 3 Interventional Results available

Nitric Oxide Administration During Pediatric Cardiopulmonary Bypass Surgery to Prevent Platelet Activation

NCT03455218
View directory record Official record
Conditions
Inflammation, Platelet Dysfunction
Interventions
Nitric Oxide, Placebo, INOmax
Drug · Device
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
Up to 1 Year
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Aug 12, 2020 · Synced Sep 6, 2026, 4:54 PM 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 15, 2022 · Synced Sep 6, 2026, 4:54 PM EDT
Completed Phase 2 Interventional Results available

Examining the Use of Non-Invasive Inhaled Nitric Oxide to Reduce Chronic Lung Disease in Premature Newborns

NCT00955487
View directory record Official record
Conditions
Bronchopulmonary Dysplasia
Interventions
Inhaled Nitric Oxide (iNO), Nitrogen (placebo)
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
Up to 72 Hours
Enrollment
124 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2014
U.S. locations
6
States / cities
Birmingham, Alabama • San Diego, California • Aurora, Colorado + 3 more
Source: ClinicalTrials.gov public record
Updated Jun 14, 2017 · Synced Sep 6, 2026, 4:54 PM EDT
Terminated Phase 2 Interventional

Efficacy and Safety of Inhaled Nitric Oxide (NO) in Cystic Fibrosis (CF) Patients

NCT02498535
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
Nitric Oxide 160 ppm
Drug
Lead sponsor
Novoteris, LLC
Industry
Eligibility
18 Years and older
Enrollment
49 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
6
States / cities
Garden Grove, California • Los Angeles, California • Columbus, Ohio + 3 more
Source: ClinicalTrials.gov public record
Updated Mar 4, 2021 · Synced Sep 6, 2026, 4:54 PM 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 26, 2015 · Synced Sep 6, 2026, 4:54 PM EDT
Terminated Phase 3 Interventional

Inhaled Nitric Oxide in Prevention/Treatment of Ischemia-Reperfusion Lung Injury Related to Lung Transplantation

NCT00060450
View directory record Official record
Conditions
Ischemia-Reperfusion Injury
Interventions
nitric oxide for inhalation, Placebo
Drug
Lead sponsor
Mallinckrodt
Industry
Eligibility
18 Years and older
Enrollment
84 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2006
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 8, 2016 · Synced Sep 6, 2026, 4:54 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Nitrous Oxide for Pain Management of Intrauterine Device (IUD) Insertion

NCT02391714
View directory record Official record
Conditions
Contraception
Interventions
IUD insertion, Povidone-Iodine, Chlorhexidine, Oxygen, Nitrous oxide
Procedure · Drug · Other
Lead sponsor
University of New Mexico
Other
Eligibility
12 Years and older · Female only
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Albuquerque, New Mexico
Source: ClinicalTrials.gov public record
Updated Feb 2, 2016 · Synced Sep 6, 2026, 4:54 PM EDT
Withdrawn Phase 3 Interventional Accepts healthy volunteers

Intracervical Balloon Placement With Nitrous Oxide Administration

NCT06498908
View directory record Official record
Conditions
Labor Pain, Induced; Birth
Interventions
Nitrous oxide, Oxygen
Drug
Lead sponsor
Olivia Sher
Other
Eligibility
18 Years to 45 Years · Female only
Healthy volunteers
Accepts healthy volunteers
Timeline
2026
U.S. locations
1
States / cities
Brooklyn, New York
Source: ClinicalTrials.gov public record
Updated Apr 2, 2026 · Synced Sep 6, 2026, 4:54 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effectiveness of a Butyrate Formulation and Butyrate + Polyphenol Formulation on Gut Health, Permeability and Associated Symptoms

NCT06419231
View directory record Official record
Conditions
Gut Health
Interventions
Butyrate Formulation, Butyrate + Polyphenol Formulation, Placebo
Dietary Supplement
Lead sponsor
Supplement Formulators, Inc.
Industry
Eligibility
21 Years to 70 Years
Enrollment
143 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Fort Lauderdale, Florida
Source: ClinicalTrials.gov public record
Updated Jan 12, 2026 · Synced Sep 6, 2026, 4:54 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Nitrous Oxide for Pain Management During In-office Transcervical Sterilization

NCT02312739
View directory record Official record
Conditions
Contraception, Inhalation of Nitrous Oxide
Interventions
In-office Transcervical Sterilization (Essure®), Standard Oral pain medications, Intramuscular Ketorolac, Placebo pills, Oxygen, Nitrous Oxide
Procedure · Drug · Other
Lead sponsor
University of New Mexico
Other
Eligibility
21 Years and older · Female only
Enrollment
72 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2015
U.S. locations
1
States / cities
Albuquerque, New Mexico
Source: ClinicalTrials.gov public record
Updated Jul 5, 2016 · Synced Sep 6, 2026, 4:54 PM EDT
Not listed Phase 1Phase 2 Interventional

Impact of CBD-Rich Oil on Aversive Memory Reconsolidation

NCT04726475
View directory record Official record
Conditions
Anxiety and Fear
Interventions
Interoceptive Aversive Memory Reactivation, Cannabidiol (CBD)-Rich Broad Spectrum Hemp Extract Oil, Placebo Oil
Behavioral · Dietary Supplement
Lead sponsor
University of Texas at Austin
Other
Eligibility
18 Years to 65 Years
Enrollment
96 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2024
U.S. locations
1
States / cities
Austin, Texas
Source: ClinicalTrials.gov public record
Updated Jan 18, 2022 · Synced Sep 6, 2026, 4:54 PM EDT
Completed Not applicable Interventional Results available

Cryoanalgesia to Treat Post-Amputation Phantom Limb Pain: A Department of Defense Funded Multicenter Study

NCT03449667
View directory record Official record
Conditions
Post-Amputation Phantom Limb Pain
Interventions
Cryoneurolysis, Sham Comparator
Device
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years and older
Enrollment
144 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
6
States / cities
Palo Alto, California • San Diego, California • Gainesville, Florida + 2 more
Source: ClinicalTrials.gov public record
Updated Feb 16, 2023 · Synced Sep 6, 2026, 4:54 PM EDT
Terminated Early Phase 1 Interventional Results available

Nitrous TRD Bipolar Depression

NCT02757521
View directory record Official record
Conditions
Treatment- Resistant Bipolar Disorder, Bipolar Disorder, Bipolar Depressive Disorder
Interventions
Nitrous Oxide, Placebo
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 75 Years
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jul 4, 2019 · Synced Sep 6, 2026, 4:54 PM EDT