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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Nitrous oxide administration Clear all
Not listed Phase 4 Interventional

Nitrous Oxide Prior to Intranasal Midazolam for Moderate Dental Sedation in Pediatric Patients

NCT04083105
View directory record Official record
Conditions
Dental Anxiety, Pain
Interventions
Nitrous Oxide, Midazolam
Drug
Lead sponsor
Children's Hospital Colorado
Other
Eligibility
3 Years to 8 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Sep 9, 2019 · Synced Sep 28, 2026, 7:24 PM EDT
Completed Not applicable Interventional

Virtual Reality vs Nitrous Oxide in Pediatric Dentistry

NCT05890898
View directory record Official record
Conditions
Pediatric Dentistry
Interventions
Virtual Reality Headset, Nitrous Oxide
Behavioral · Drug
Lead sponsor
Geisinger Clinic
Other
Eligibility
4 Years to 12 Years
Enrollment
62 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Danville, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 25, 2025 · Synced Sep 28, 2026, 7:24 PM EDT
Recruiting Not applicable Interventional

AuriculoTherapy NeuroImaging

NCT06825390
View directory record Official record
Conditions
Low Back Pain, Chronic Low-back Pain, Back Pain, Low, Lumbar Disc Disease, Lumbar Discogenic Pain, Lumbar Pain Syndrome, Lumbar Post-Laminectomy Syndrome, Back Pain Lower Back Chronic, Back Pain Without Radiation, Pain;Back Low;Chronic
Interventions
Cryo-auriculotherapy, Sham auriculotherapy, Experimental auricular stimulation
Device · Other
Lead sponsor
Keith M Vogt
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2029
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 17, 2026 · Synced Sep 28, 2026, 7:24 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 14, 2009 · Synced Sep 28, 2026, 7:24 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 28, 2026, 7:24 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 30, 2023 · Synced Sep 28, 2026, 7:24 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 Aug 12, 2026 · Synced Sep 28, 2026, 7:24 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 13, 2026 · Synced Sep 28, 2026, 7:24 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Comparison of Triazolam and Midazolam for Anxiolysis During Dental Treatment in the Pediatric Patient

NCT03360123
View directory record Official record
Conditions
Dental Anxiety
Interventions
Midazolam Hydrochloride 2Mg/mL Syrup, Triazolam 0.125 MG
Drug
Lead sponsor
University of Pittsburgh
Other
Eligibility
7 Years to 17 Years
Enrollment
4 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 18, 2018 · Synced Sep 28, 2026, 7:24 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Effect of Nitrous Oxide (N2O) on Intraocular Pressure in Healthy Volunteers

NCT00967694
View directory record Official record
Conditions
Glaucoma, Sedation
Interventions
Nitrous oxide
Drug
Lead sponsor
Oregon Health and Science University
Other
Eligibility
18 Years to 40 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2011
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Sep 22, 2014 · Synced Sep 28, 2026, 7:24 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 15, 2020 · Synced Sep 28, 2026, 7:24 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 Sep 28, 2026, 7:24 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 28, 2026, 7:24 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 28, 2026, 7:24 PM EDT
Terminated Early Phase 1 Interventional Accepts healthy volunteers

Nitrous Oxide for Pain Management During In-Office Gynecology Procedures

NCT06661005
View directory record Official record
Conditions
Nitrous Oxide
Interventions
Nitrous oxide, IV Sedation
Drug
Lead sponsor
University of Arizona
Other
Eligibility
18 Years to 99 Years · Female only
Enrollment
3 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Oct 27, 2024 · Synced Sep 28, 2026, 7:24 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 18, 2024 · Synced Sep 28, 2026, 7:24 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 4, 2026 · Synced Sep 28, 2026, 7:24 PM EDT
Active, not recruiting Not applicable Interventional

Cryoneurolysis for Painful Diabetic Neuropathy of the Foot

NCT06646731
View directory record Official record
Conditions
Painful Diabetic Peripheral Neuropathy (PDPN)
Interventions
cryoneurolysis, sham cryoneurolysis
Device
Lead sponsor
University of California, San Diego
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Jul 5, 2026 · Synced Sep 28, 2026, 7:24 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 28, 2026, 7:24 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Mask Study: One-handed vs. Two Handed Technique in Children

NCT03215121
View directory record Official record
Conditions
Obstructive Sleep Apnea
Interventions
One handed mask airway, switch to two hands, Two handed mask airway + jaw thrust, Two handed mask airway, switch to one hand
Procedure
Lead sponsor
Nemours Children's Clinic
Other
Eligibility
1 Year to 8 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
Wilmington, Delaware
Source: ClinicalTrials.gov public record
Updated Jan 22, 2020 · Synced Sep 28, 2026, 7:24 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Impact of Therapy Dogs on Child Anxiety and Behavior During Local Anesthesia for Dental Procedures

NCT06725134
View directory record Official record
Conditions
Situational Anxiety, Behavior
Interventions
Therapy dog presence, Standard-of-care basic behavior guidance
Behavioral
Lead sponsor
University of Michigan
Other
Eligibility
4 Years to 12 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Dec 2, 2025 · Synced Sep 28, 2026, 7:24 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 Sep 28, 2026, 7:24 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
Jefferson Drapkin
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 Sep 16, 2026 · Synced Sep 28, 2026, 7:24 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 Sep 28, 2026, 7:24 PM EDT