Using nitrous oxide to treat obsessive-compulsive disorder

Efficacy of Nitrous Oxide in OCD: Pilot Study

Phase 2 Interventional Stanford University · NCT03826693

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
Enrollment45 (estimated)
Ages18 Years to 65 Years
SexAll
SponsorStanford University Academic / other
Locations1 site (Stanford, California)
Trial IDNCT03826693 on ClinicalTrials.gov

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.

Who should consider this trial

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

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.

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 performed: 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.

Eligibility criteria

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 this trial is running

Stanford, California

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Obsessive-Compulsive DisorderOCDnitrous oxide
Last reviewed 2026-06-09 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.