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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Nitrous Oxide Clear all
Completed Not applicable Interventional Accepts healthy volunteers Results available

Virtual Reality in Pediatric Dentistry

NCT05585905
View directory record Official record
Conditions
Behavior, Child, Anxiety, Dental
Interventions
Virtual Reality, Basic Behavior Guidance Techniques
Device · Behavioral
Lead sponsor
University of Southern California
Other
Eligibility
6 Years to 18 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
2
States / cities
Long Beach, California • Los Angeles, California
Source: ClinicalTrials.gov public record
Updated May 17, 2026 · Synced Jul 23, 2026, 9:34 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Combined Alcohol and Nitrous Oxide Intake - 15

NCT00000263
View directory record Official record
Conditions
Opioid-Related Disorders, Substance-Related Disorders
Interventions
30% Nitrous oxide, 0.25 g/Kg ethanol, 0.5 g/KG ethanol, 0 g/Kg ethanol
Drug · Other
Lead sponsor
University of Chicago
Other
Eligibility
Not listed
Enrollment
11 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1997 – 1998
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 26, 2015 · Synced Jul 23, 2026, 9:34 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Colonoscopy Using Nitrous Oxide- A Pilot Study in the USA

NCT04305158
View directory record Official record
Conditions
Nitrous Oxide
Interventions
Nitrous Oxide
Drug
Lead sponsor
University of Arkansas
Other
Eligibility
18 Years and older
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Little Rock, Arkansas
Source: ClinicalTrials.gov public record
Updated Apr 10, 2024 · Synced Jul 23, 2026, 9:34 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 Jul 23, 2026, 9:34 PM 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 29, 2021 · Synced Jul 23, 2026, 9:34 PM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

Effect of Nitrous Oxide on Aggression.

NCT06118567
View directory record Official record
Conditions
Intermittent Explosive Disorder
Interventions
Nitrous oxide, Room Air
Drug
Lead sponsor
Ohio State University
Other
Eligibility
21 Years to 55 Years
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 26, 2025 · Synced Jul 23, 2026, 9:34 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Behavioral Contingencies on Effects of Nitrous Oxide - 12

NCT00000260
View directory record Official record
Conditions
Opioid-Related Disorders, Substance-Related Disorders
Interventions
Nitrous oxide
Drug
Lead sponsor
University of Chicago
Other
Eligibility
21 Years and older
Enrollment
18 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1997 – 1998
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 26, 2015 · Synced Jul 23, 2026, 9:34 PM EDT
Completed Phase 2 Interventional Results available

Nitrous Oxide as Treatment for Major Depression - a Pilot Study

NCT02139540
View directory record Official record
Conditions
Depression, Major Depressive Disorder
Interventions
Nitrous Oxide, Placebo
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 65 Years
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jan 26, 2020 · Synced Jul 23, 2026, 9:34 PM EDT
Completed Phase 2 Interventional Results available

Inhaled Nitrous Oxide for Treatment-Resistant Depression: Optimizing Dosing Strategies

NCT03283670
View directory record Official record
Conditions
Depressive Disorder, Major, Depressive Disorder, Treatment-Resistant
Interventions
Nitrous Oxide 25%, Nitrous Oxide 50%, Placebo Gas
Drug
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years to 75 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2020
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Apr 3, 2022 · Synced Jul 23, 2026, 9:34 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Nitrous Oxide for External Cephalic Version

NCT03502915
View directory record Official record
Conditions
External Cephalic Version
Interventions
Nitrous Oxide, Placebo
Drug · Other
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years and older · Female only
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 29, 2019 · Synced Jul 23, 2026, 9:34 PM EDT
Completed Not applicable Interventional

Virtual Reality and Anxiety in Pediatric Dentistry

NCT04886141
View directory record Official record
Conditions
Pediatric Dentistry
Interventions
Virtual Reality Headset
Behavioral
Lead sponsor
Geisinger Clinic
Other
Eligibility
4 Years to 12 Years
Enrollment
53 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Danville, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Aug 3, 2022 · Synced Jul 23, 2026, 9:34 PM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Comparing Sedara to Butorphanol in Early Labor

NCT01636999
View directory record Official record
Conditions
Labor Pain
Interventions
50% Nitrous Oxide/50% Oxygen
Drug
Lead sponsor
West Penn Allegheny Health System
Other
Eligibility
18 Years and older · Female only
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Oct 4, 2020 · Synced Jul 23, 2026, 9:34 PM EDT
Terminated Phase 2 Interventional Results available

Nitrous Oxide for PTSD

NCT04378426
View directory record Official record
Conditions
PTSD
Interventions
Nitrous Oxide, Midazolam, Nitrogen, Oxygen, Saline
Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
18 Years to 65 Years
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Palo Alto, California
Source: ClinicalTrials.gov public record
Updated Mar 2, 2023 · Synced Jul 23, 2026, 9:34 PM EDT
Completed Not applicable Interventional

Nitrous Oxide for Acute Migraine Pain in the Emergency Room (ED)

NCT01287052
View directory record Official record
Conditions
Migraine, Pain
Interventions
Nitrous Oxide
Drug
Lead sponsor
Children's Hospitals and Clinics of Minnesota
Other
Eligibility
8 Years to 18 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jul 29, 2015 · Synced Jul 23, 2026, 9:34 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Self-Administered Nitrous Oxide (SANO) During Transrectal Prostate Biopsy to Reduce Patient Anxiety and Pain

NCT05803096
View directory record Official record
Conditions
Prostate Disease, Malignancy, Benign Prostatic Hyperplasia, Prostate Cancer, Prostate Adenocarcinoma, Anxiety and Fear, Pain
Interventions
Self-Administered Nitrous Oxide, Oxygen
Drug · Other
Lead sponsor
Beth Israel Deaconess Medical Center
Other
Eligibility
18 Years to 85 Years · Male only
Enrollment
143 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jan 29, 2024 · Synced Jul 23, 2026, 9:34 PM EDT
Completed Not applicable Interventional Results available

Inhaled Nitrous Oxide for the Prevention of Emergence Reaction During Ketamine Administration in Adults, a Pilot Study

NCT02145169
View directory record Official record
Conditions
Emergence Reaction, Procedural Sedation
Interventions
Inhaled Nitrous Oxide
Drug
Lead sponsor
Albert Einstein Healthcare Network
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Mar 18, 2020 · Synced Jul 23, 2026, 9:34 PM EDT
Active, not recruiting Not applicable Interventional

Nitrous Oxide For Endoscopic Ablation of Refractory Barrett's Esophagus (NO FEAR-BE)

NCT03554356
View directory record Official record
Conditions
Barrett Esophagus, Intestinal Metaplasia, Esophageal Dysplasia
Interventions
CryoBalloon Focal Ablation System
Device
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years and older
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2027
U.S. locations
11
States / cities
Birmingham, Alabama • Washington D.C., District of Columbia • Baltimore, Maryland + 8 more
Source: ClinicalTrials.gov public record
Updated Jul 12, 2026 · Synced Jul 23, 2026, 9:34 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Virtual Reality Compared to Nitrous Oxide for Labor Analgesia

NCT04749043
View directory record Official record
Conditions
Labor Pain
Interventions
Oculus Quest 2 Virtual Reality Device, Nitrous oxide
Device · Drug
Lead sponsor
Brendan Carvalho
Other
Eligibility
18 Years and older · Female only
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Mar 17, 2024 · Synced Jul 23, 2026, 9:34 PM EDT
Completed Not applicable Interventional

Interaction of Cobalamin Status With Nitrous Oxide in Relation to Postoperative Cognitive Changes in the Elderly

NCT00212147
View directory record Official record
Conditions
Avitaminosis, Delirium, Dementia, Amnestic, Cognitive Disorders
Interventions
General anesthesia with nitrous oxide, General anesthesia without nitrous oxide
Drug
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
60 Years and older
Enrollment
444 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2008
U.S. locations
2
States / cities
Brooklyn, New York • New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 7, 2022 · Synced Jul 23, 2026, 9:34 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 Jul 23, 2026, 9:34 PM EDT
Completed Not applicable Interventional Results available

Vitamins in Nitrous Oxide Study

NCT00655980
View directory record Official record
Conditions
Major Surgery, Coronary Artery Disease
Interventions
Vitamin B12 and folic acid, Nitrous oxide and placebo, standard of care
Drug · Other
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older
Enrollment
687 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2016
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Sep 30, 2020 · Synced Jul 23, 2026, 9:34 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 Jul 23, 2026, 9:34 PM EDT
Completed Not applicable Interventional Results available

Effect of Nitrous Oxide in Treating Neuropathic Pain: A Study in Chronic Low Back Pain Patients

NCT01172600
View directory record Official record
Conditions
Low Back Pain, Radiating Pain
Interventions
Entonox, Oxygen
Other
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years to 80 Years
Enrollment
78 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Oct 16, 2016 · Synced Jul 23, 2026, 9:34 PM EDT