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
| Phase | Phase 2 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years to 65 Years |
| Sex | All |
| Enrollment | 45 (estimated) |
| Sponsor | Stanford University Academic / other |
| Locations | 1 site (Stanford, California) |
| Status | Recruiting |
| Started | April 17, 2021 |
| Main results expected | September 2026 |
| Study ends | October 2027 |
| Registry record updated | August 27, 2025 |
| Trial ID | NCT03826693 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
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Stanford University
Stanford, California, United States Recruiting
Study contacts
- Principal investigator: Peter J van Roessel, MD, PhD — Stanford Univeristy
- Study coordinator: Pavithra Mukunda, MS
- Email: ocdresearch@stanford.edu
- Phone: 650-723-4095
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
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Low-intensity focused ultrasound targeting the subthalamic nucleus for OCD
A short test is being done to see if a wearable, non-invasive ultrasound device can safely and tolerably help adults with OCD by targeting a brain region called the subthalamic nucleus.
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Mindfulness-Based Cognitive Therapy for OCD Delivered Online
This study tests a synchronous online MBCT program for adults with OCD to see if it is acceptable and feasible and to explore links between biological markers, OCD severity, and treatment response.
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Targeted brain stimulation for OCD: test of tTIS on nucleus accumbens
This study tests whether targeted temporal interference stimulation of the nucleus accumbens can help reduce obsessive-compulsive symptoms in adults with OCD, compared with sham stimulation.
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Anxiety Skills Study: See if video skill training plus therapy helps people with anxiety
This study tests whether a brief video-based skill training can help people with anxiety as well as four therapy sessions, and how durable the effects are over a year.
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AttunE LIFU for OCD: a non-invasive brain stimulation study
This trial tests ATTN201, a wearable ultrasound headband, to see if it helps adults with OCD compared to a sham treatment.
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Combined ERP and Habit Reversal Therapy for Tourettic OCD
This study tests whether a merged Exposure and Response Prevention and Habit Reversal Therapy helps adults with Tourettic OCD more than either therapy alone or basic psychoeducation.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.