NCT03736538

Nitrous Oxide- Suicidal Ideation

Enrolling by Invitation
PHASE1Ages 18–65InterventionalTreatment
Washington University School of Medicine
~50 participants
Updated 2025-12-22 on ClinicalTrials.gov
What's tested:Nitrous OxidePlacebo gas

At a glance

Recruiting sites
0 of 1 listed site is recruiting right now
RecruitingSuspended, closed, or not yet open
What they're measuring
Severity and number of adverse events in both nitrous oxide and placebo groups
Measured over Throughout study duration (approximately 60 days)
+2 more outcomes measured
Major Depressive Disorder
Depression
Mood Disorders
Suicidal Ideation
1 sites across 1 states
Missouri1
  • Charles R Conway, MD · PRINCIPAL_INVESTIGATOR · Washington University School of Medicine

This trial hasn't published a contact. View it on ClinicalTrials.gov

  • Severity and number of adverse events in both nitrous oxide and placebo groupsThroughout study duration (approximately 60 days)

    Safety and tolerability of inhaled nitrous oxide will be measured by collecting adverse events in both groups at each study visit throughout the study.

  • Differential change in suicidal ideationBaseline to Day 7, approximately 7 days (following the inpatient period inhalation sessions)

    Participants receiving inpatient treatment as usual plus nitrous oxide compared to participants receiving inpatient treatment as usual plus placebo as measured by scores on the 19-item Scale for Suicidal Ideation (SSI; total score range is 0 to 38, higher scores indicate greater suicidal ideation).

  • Identification of pre-treatment key clinical correlates of anti-suicidal response to nitrous oxideChange of scores on the SSI for the approximate 7 days of inpatient period

    Correlations of change in Scale for Suicidal Ideation score (SSI; total score range is 0 to 38, higher scores indicate greater suicidal ideation) at end of inpatient period with: 1) presence of family history of alcohol dependence; 2) a personal/family history of suicide attempt or a family history of suicide.