Clinical trial Recruiting at 1 site Phase 2 Interventional Ages 18 to 65

Using nitrous oxide to treat obsessive-compulsive disorder

Official title: Efficacy of Nitrous Oxide in OCD: Pilot Study

Run by Stanford University · NCT03826693 · Data updated 2026-11-12

This study is testing if breathing in nitrous oxide can quickly help adults with obsessive-compulsive disorder feel better.

Quick facts

PhasePhase 2
Study typeInterventional
Ages18 Years to 65 Years
SexAll
Enrollment45 (estimated)
SponsorStanford University
Academic / other
Locations1 site (Stanford, California)
StatusRecruiting
StartedApril 17, 2021
Main results expectedSeptember 2026
Study endsOctober 2027
Registry record updatedAugust 27, 2025
Trial IDNCT03826693 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates for this study are adults aged 18-65 with a primary diagnosis of OCD and significant symptom severity.

Probably not a fit

Patients with psychiatric or medical conditions that pose safety risks or those who are pregnant or nursing may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This pilot study investigates the efficacy of nitrous oxide, a commonly used inhaled anesthetic, in providing rapid symptom relief for individuals suffering from obsessive-compulsive disorder (OCD). The study aims to determine if a single inhalation of nitrous oxide can significantly improve OCD symptoms in participants aged 18 to 65 with a primary diagnosis of the disorder. Participants will be monitored for safety and effectiveness, with a focus on the severity of their symptoms before and after treatment.

Why it matters

Potential benefit: If successful, this treatment could offer a rapid and effective option for individuals struggling with OCD.

How similar studies have gone: While the use of nitrous oxide for OCD is a novel approach, other studies have explored its effects in different contexts, indicating potential for success.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Age 18-65
* Primary diagnosis of OCD
* Sufficient severity of OCD symptoms
* Ability to tolerate a treatment-free period
* Capacity to provide informed consent

Exclusion Criteria:

* Psychiatric or medical conditions that make participation unsafe
* Pregnant or nursing females
* Concurrent use of any medications that might increase the risk of participation (e.g. drug interactions)

Where it's running

  • Stanford University
    Stanford, California, United States
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.