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ClinicalTrials.gov public records Last synced Sep 29, 2026, 3:49 PM EDT

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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Placebo gas Clear all
Completed Phase 2 Interventional Accepts healthy volunteers

Effects of Subanesthetic Concentrations of Isoflurane/Nitrous Oxide - 3

NCT00000251
View directory record Official record
Conditions
Opioid-Related Disorders, Substance-Related Disorders
Interventions
30% N2O, 0.2% isoflurane, 0.4% isoflurane, 100% oxygen
Drug · Other
Lead sponsor
University of Chicago
Other
Eligibility
21 Years to 32 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1994 – 1996
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Dec 1, 2015 · Synced Sep 29, 2026, 3:49 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 29, 2026, 3:49 PM EDT
Not listed Phase 4 Interventional Accepts healthy volunteers

Safety and Efficacy of Intranasal Dexmedetomidine

NCT02985697
View directory record Official record
Conditions
Safety and Efficacy of Intranasal Dexmedetomidine
Interventions
Dexmedetomidine, Midazolam Hydrochloride, Nitrous Oxide
Drug
Lead sponsor
Bon Secours Pediatric Dental Associates
Other
Eligibility
3 Years to 6 Years
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Dec 6, 2016 · Synced Sep 29, 2026, 3:49 PM EDT
Terminated Phase 2 Interventional Results available

Nitric Oxide in Myocardial Infarction Size

NCT00568061
View directory record Official record
Conditions
Acute Myocardial Infarction, ST Elevation MI, STEMI
Interventions
Nitric Oxide, Placebo
Drug
Lead sponsor
Mallinckrodt
Industry
Eligibility
18 Years and older
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
11
States / cities
Mobile, Alabama • Miami, Florida • Chicago, Illinois + 6 more
Source: ClinicalTrials.gov public record
Updated Nov 20, 2019 · Synced Sep 29, 2026, 3:49 PM EDT
Terminated Phase 2 Interventional Results available

Inhaled Nitric Oxide After Out-of-Hospital Cardiac Arrest

NCT03079102
View directory record Official record
Conditions
Heart Arrest, Out-Of-Hospital
Interventions
Nitric Oxide, Nitrogen
Drug
Lead sponsor
Cameron Dezfulian
Other
Eligibility
18 Years and older
Enrollment
57 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
5
States / cities
McKeesport, Pennsylvania • Monroeville, Pennsylvania • Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 24, 2022 · Synced Sep 29, 2026, 3:49 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 29, 2026, 3:49 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 29, 2026, 3:49 PM EDT
Not listed Phase 1 Interventional Accepts healthy volunteers

Developing Anesthesia as Post Traumatic Stress Disorder (PTSD) Therapy

NCT01736020
View directory record Official record
Conditions
Healthy
Interventions
Dexmedetomidine, Propofol, Ketamine, Nitrous Oxide, Placebo
Drug
Lead sponsor
Southern California Institute for Research and Education
Other
Eligibility
18 Years to 35 Years
Enrollment
293 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2017
U.S. locations
1
States / cities
Irvine, California
Source: ClinicalTrials.gov public record
Updated Oct 12, 2016 · Synced Sep 29, 2026, 3:49 PM EDT
Completed Phase 2 Interventional

Trial of Inhaled Nitric Oxide (iNO) on Ischemia / Reperfusion Injury During Orthotopic Liver Transplantation With Marginal Grafts

NCT01172691
View directory record Official record
Conditions
Liver Transplant
Interventions
Inhaled Nitric Oxide (iNO), Placebo Arm (Nitrogen)
Drug
Lead sponsor
Baylor Research Institute
Other
Eligibility
17 Years to 70 Years
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Jan 27, 2026 · Synced Sep 29, 2026, 3:49 PM EDT
Completed Phase 4 Interventional

Insulin Resistance and Intramyocellular Lipid Content in Glucose Intolerant Subjects Receiving Rosiglitazone

NCT00746174
View directory record Official record
Conditions
Insulin Sensitivity
Interventions
Rosiglitazone, Placebo
Drug
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
30 Years to 65 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2008
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Sep 2, 2008 · Synced Sep 29, 2026, 3:49 PM 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 Mar 31, 2026 · Synced Sep 29, 2026, 3:49 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 29, 2026, 3:49 PM EDT
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 29, 2026, 3:49 PM EDT
Completed Phase 2 Interventional

The Role of Topically Dissolved Oxygen (TDO) to Ameliorate Signs of Photodamage

NCT00991198
View directory record Official record
Conditions
Rosacea, Acne Vulgaris, Atopic Dermatitis, Seborrheic Dermatitis
Interventions
Topical oxygen, placebo
Drug
Lead sponsor
Aria Aesthetics Inc.
Industry
Eligibility
25 Years to 60 Years · Female only
Enrollment
49 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
High Point, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 7, 2011 · Synced Sep 29, 2026, 3:49 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Curcumin (Tumeric) in the Treatment of Irritable Bowel Syndrome: A Randomized-Controlled Trial

NCT00779493
View directory record Official record
Conditions
Irritable Bowel Syndrome
Interventions
curcumin, placebo
Dietary Supplement
Lead sponsor
Kaiser Permanente
Other
Eligibility
18 Years and older
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2009
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 10, 2015 · Synced Sep 29, 2026, 3:49 PM EDT
Terminated Phase 3 Interventional Results available

A Study to Assess Pulsed Inhaled Nitric Oxide vs Placebo in Subjects With Mild or Moderate COVID-19

NCT04421508
View directory record Official record
Conditions
COVID-19, Coronavirus, Coronavirus Infection
Interventions
INOpulse, Placebo
Combination Product
Lead sponsor
Bellerophon Pulse Technologies
Industry
Eligibility
18 Years and older
Enrollment
191 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
17
States / cities
Phoenix, Arizona • San Diego, California • Miami, Florida + 8 more
Source: ClinicalTrials.gov public record
Updated Feb 20, 2023 · Synced Sep 29, 2026, 3:49 PM EDT
Completed Phase 1 Interventional Results available

Is Obstructive Sleep Apnea Important in the Development of Alzheimer's Disease?

NCT05094271
View directory record Official record
Conditions
OSA, Sleep Apnea, Obstructive Sleep Apnea, Alzheimer Disease
Interventions
Supplemental Oxygen, Continuous Positive Airway Pressure Machine, Room Air
Other · Device
Lead sponsor
University of California, San Diego
Other
Eligibility
65 Years to 85 Years
Enrollment
182 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2025
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated May 10, 2026 · Synced Sep 29, 2026, 3:49 PM EDT
Recruiting Phase 1 Interventional Accepts healthy volunteers

NMDA Receptor Antagonist Nitrous Oxide Targets Affective Brain Circuits

NCT02994433
View directory record Official record
Conditions
Depressive Disorder, Major, Depressive Disorder, Treatment-Resistant
Interventions
Nitrous Oxide, Placebo gas, MRI
Drug · Device
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 65 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2027
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Apr 28, 2026 · Synced Sep 29, 2026, 3:49 PM 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 29, 2026, 3:49 PM EDT
Recruiting Early Phase 1 Interventional

iNO300 Therapy in Critically Ill Patients With Pneumonia

NCT06950294
View directory record Official record
Conditions
Critical Illness, Pneumonia
Interventions
High dose inhaled nitric oxide, Sham treatment, standard therapy
Drug · Other
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 21, 2026 · Synced Sep 29, 2026, 3:49 PM 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 10, 2020 · Synced Sep 29, 2026, 3:49 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 29, 2026, 3:49 PM EDT
Terminated Phase 2Phase 3 Interventional Results available

Study of Inhaled Nitric Oxide (iNO) and Respiratory Outcomes in Late Preterm Infants

NCT01748045
View directory record Official record
Conditions
Bronchopulmonary Dysplasia
Interventions
inhaled nitric oxide, Placebo Comparator - nitrogen gas
Drug
Lead sponsor
Tufts Medical Center
Other
Eligibility
30 Weeks to 36 Weeks
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 18, 2017 · Synced Sep 29, 2026, 3:49 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 29, 2026, 3:49 PM EDT