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ClinicalTrials.gov public records Last synced Oct 21, 2026, 2:59 PM EDT

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Showing 1–24 of 52 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Nitrous oxide administration Clear all
Completed Phase 2 Interventional

Nitrous Oxide for the Treatment of Major Depressive Disorder

NCT03869736
View directory record Official record
Conditions
Depression, Major Depressive Disorder
Interventions
Nitrous Oxide, Placebo
Drug
Lead sponsor
Bayside Health
Government
Eligibility
18 Years and older
Enrollment
81 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2023
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Dec 16, 2024 · Synced Oct 21, 2026, 2:59 PM EDT
Completed Phase 4 Interventional Results available

A Comparison of Intranasal Midazolam and Nitrous Oxide (N2O) Minimal Sedation for Minor Procedures in a Pediatric Emergency Department

NCT03085563
View directory record Official record
Conditions
Conscious Sedation, Simple Lacerations Less Than 4 cm, Lumbar Punctures, Minor Incision Drainage of Abscesses Not Requiring Extensive Debridement
Interventions
Nitrous Oxide, Midazolam
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
2 Years to 17 Years
Enrollment
63 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated May 10, 2022 · Synced Oct 21, 2026, 2:59 PM EDT
Completed Not applicable Interventional Results available

CryoBalloon Ablation for Treatment of Duodenal Adenomas

NCT03847636
View directory record Official record
Conditions
Duodenal Adenomas, Familial Adenomatous Polyposis
Interventions
CryoBalloon ablation
Device
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2026
U.S. locations
4
States / cities
Baltimore, Maryland • Manhasset, New York • Danville, Pennsylvania + 1 more
Source: ClinicalTrials.gov public record
Updated Aug 5, 2026 · Synced Oct 21, 2026, 2:59 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Patient Preferences in Anesthesia for Abortion Care

NCT03030443
View directory record Official record
Conditions
Pregnancy Termination in First Trimester
Interventions
Not listed
Lead sponsor
University of New Mexico
Other
Eligibility
18 Years and older · Female only
Enrollment
29 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2022
U.S. locations
1
States / cities
Albuquerque, New Mexico
Source: ClinicalTrials.gov public record
Updated May 31, 2023 · Synced Oct 21, 2026, 2:59 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Nitrous Oxide for Pain Management of First Trimester Surgical Abortion

NCT02096575
View directory record Official record
Conditions
Abortion in First Trimester
Interventions
Nitrous oxide administration
Other
Lead sponsor
University of New Mexico
Other
Eligibility
18 Years and older · Female only
Enrollment
140 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2015
U.S. locations
1
States / cities
Albuquerque, New Mexico
Source: ClinicalTrials.gov public record
Updated Apr 19, 2016 · Synced Oct 21, 2026, 2:59 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 4, 2022 · Synced Oct 21, 2026, 2:59 PM EDT
Terminated Not applicable Interventional

Prime Time for Superficial Femoral Artery (SFA) - The SFA Study

NCT00902317
View directory record Official record
Conditions
Peripheral Vascular Disease
Interventions
Cryoplasty (PolarCath peripheral balloon catheter), Laser Angioplasty (Spectranetics), SilverHawk Atherectomy, Viabahn Endograft, Angioplasty/Stent (Guidant "Absolute" stent)
Procedure · Device
Lead sponsor
Arizona Heart Institute
Other
Eligibility
18 Years and older
Enrollment
130 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2009
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated May 15, 2009 · Synced Oct 21, 2026, 2:59 PM EDT
Completed Phase 4 Interventional Results available

Effect of Ketorolac on Post Adenotonsillectomy Pain

NCT03467750
View directory record Official record
Conditions
Obstructive Sleep Apnea
Interventions
Ketorolac, Standard of Care
Drug
Lead sponsor
Emory University
Other
Eligibility
2 Years to 18 Years
Enrollment
63 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2023
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Sep 19, 2024 · Synced Oct 21, 2026, 2:59 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 4, 2022 · Synced Oct 21, 2026, 2:59 PM 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 4, 2026 · Synced Oct 21, 2026, 2:59 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 30, 2015 · Synced Oct 21, 2026, 2:59 PM EDT
Completed Phase 3 Interventional Results available

Nitrous Oxide for the Treatment of Complex Regional Pain Syndrome

NCT03879538
View directory record Official record
Conditions
Complex Regional Pain Syndrome
Interventions
Nitrous Oxide, Oxygen
Drug
Lead sponsor
The Cleveland Clinic
Other
Eligibility
18 Years to 65 Years
Enrollment
44 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 9, 2024 · Synced Oct 21, 2026, 2:59 PM EDT
Active, not recruiting Not applicable Interventional

Multi-center Clinical Study to Evaluate the C2 CryoBalloon Focal Ablation System

NCT02514525
View directory record Official record
Conditions
Barrett Esophagus
Interventions
CryoBalloon Ablation System
Device
Lead sponsor
Pentax Medical
Industry
Eligibility
18 Years and older
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2025
U.S. locations
11
States / cities
Orange, California • Sarasota, Florida • Chicago, Illinois + 8 more
Source: ClinicalTrials.gov public record
Updated Jan 13, 2025 · Synced Oct 21, 2026, 2:59 PM 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 14, 2026 · Synced Oct 21, 2026, 2:59 PM EDT
Withdrawn Phase 2 Interventional

Treatment of Lung Injury From COVID-19 Infection With Intravenous Sodium Nitrite

NCT04401527
View directory record Official record
Conditions
COVID-19, Acute Respiratory Distress Syndrome, Acute Respiratory Failure
Interventions
Sodium Nitrite, Normal Saline
Drug
Lead sponsor
Hope Pharmaceuticals
Industry
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020
U.S. locations
2
States / cities
Tampa, Florida • Fort Worth, Texas
Source: ClinicalTrials.gov public record
Updated Sep 16, 2020 · Synced Oct 21, 2026, 2:59 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 Sep 14, 2026 · Synced Oct 21, 2026, 2:59 PM EDT
Terminated Phase 2 Interventional Accepts healthy volunteers Results available

Inhaled Nitrous Oxide and Labor Analgesia

NCT01738672
View directory record Official record
Conditions
Labor Pain
Interventions
Inhaled nitrous oxide
Drug
Lead sponsor
Ya'aqov Abrams
Other
Eligibility
14 Years and older · Female only
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2013
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Nov 21, 2017 · Synced Oct 21, 2026, 2:59 PM EDT
Completed Not applicable Interventional Results available

Vitamin B12 and Folate Administration on Homocysteine Concentrations After Nitrous Oxide Anesthesia

NCT00901394
View directory record Official record
Conditions
Cardiovascular Abnormalities
Interventions
B12-Folic Acid, nitrous oxide, Nitrous oxide (NO) and placebo, Placebo, oxygen nitrogen
Drug · Other
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older
Enrollment
63 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Sep 16, 2020 · Synced Oct 21, 2026, 2:59 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 29, 2026 · Synced Oct 21, 2026, 2:59 PM EDT
Not yet recruiting Not applicable Interventional

Prospective Study To Assess The Outcomes Of Nitrous Oxide Cryoablation For Treatment Of Duodenal Adenomas In Patients With Hereditary Conditions Such As FAP, HNPCC

NCT07859514
View directory record Official record
Conditions
Prospective Study , Questionaires, Outcomes, Nitrous Oxide, Cryoablation, Duodenal Adenoma, Hereditary Conditions, FAP, HNPCC
Interventions
Esophagogastroduodenoscopy
Procedure
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
20 Years to 75 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2027 – 2032
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Oct 5, 2026 · Synced Oct 21, 2026, 2:59 PM EDT
Active, not recruiting Not applicable Interventional

Cryoneurolysis Versus Radiofrequency Ablation for the Treatment of Chronic Low Back Pain

NCT06804551
View directory record Official record
Conditions
Chronic Low-back Pain
Interventions
iovera system, Radiofrequency ablation alone
Device
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Oct 8, 2026 · Synced Oct 21, 2026, 2:59 PM EDT
Enrolling by invitation Not applicable Interventional

Ultrasound-Guided Percutaneous Cryoneurolysis to Treat Pain Following Thoracic Trauma

NCT06069154
View directory record Official record
Conditions
Rib Fracture, Rib Fracture Multiple
Interventions
Cryoneurolysis, Local anesthetic peripheral nerve block, Sham Cryoneurolysis, Sham peripheral nerve block
Device · Procedure
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years and older
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2028
U.S. locations
5
States / cities
La Jolla, California • Bethesda, Maryland • Boston, Massachusetts + 1 more
Source: ClinicalTrials.gov public record
Updated Aug 24, 2026 · Synced Oct 21, 2026, 2:59 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 4, 2026 · Synced Oct 21, 2026, 2:59 PM EDT
Completed Phase 4 Interventional Results available

Use of Nitrous Oxide Donor for Labor Induction in Women With PreEclampsia

NCT03171480
View directory record Official record
Conditions
Preeclampsia, Labor, Premature
Interventions
Monoket Pill, Placebo
Drug
Lead sponsor
Ohio State University
Other
Eligibility
18 Years to 42 Years · Female only
Enrollment
176 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 4, 2022 · Synced Oct 21, 2026, 2:59 PM EDT