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Exploring Nitrous Oxide Effects for Post Traumatic Stress Disorder (PTSD)

Exploring Nitrous Oxide Effects for Post Traumatic Stress Disorder (PTSD)

Status
Completed
Phases
Phase 2
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT03375294
Acronym
tN2O
Enrollment
3
Registered
2017-12-18
Start date
2018-04-01
Completion date
2020-04-05
Last updated
2020-07-24

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Post Traumatic Stress Disorder

Keywords

PTSD

Brief summary

The purpose of this study is to understand nitrous oxide effects in post traumatic stress disorder (PTSD)

Detailed description

Post traumatic stress disorder (PTSD) is a disabling mental health disorder that impacts the lives of individuals. This study aims to understand nitrous oxide's effects in PTSD.

Interventions

DRUGNitrous Oxide

One hour inhalation of 50% nitrous oxide, an odorless, colorless gas FDA approved as an induction agent for dental sedation

Sponsors

Stanford University
Lead SponsorOTHER

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to 80 Years
Healthy volunteers
No

Inclusion criteria

* age 18-80 * Veterans of the United States Uniformed Services * primary diagnosis of PTSD * sufficient severity of PTSD symptoms * fluency in English * capacity to provide informed consent

Exclusion criteria

* psychiatric or medical conditions that make participation unsafe * pregnant or nursing females * allergy to nitrous oxide

Design outcomes

Primary

MeasureTime frameDescription
Number of Patients Who Met and Exceeded Response Criteria of Clinician Administered PTSD Scale for DSM-5 (CAPS-5)Baseline and 1 week post inhalationPatients given CAPS-5 (Clinician Administered PTSD Scale for DSM-5), a 30-item structured interview that can be used to assess PTSD symptoms over the past week. For the CAPS-5 the minimum units are 0 and maximum units on the total scale are 80. The higher the number on the CAPS-5, the more severe the symptoms. Response was defined as at least a 12 point reduction on the CAPS-5

Countries

United States

Participant flow

Participants by arm

ArmCount
Nitrous Oxide
PTSD patients in this arm will receive a single inhalation dose of 50% nitrous oxide and 50% oxygen for 1 hour Nitrous Oxide: One hour inhalation of 50% nitrous oxide, an odorless, colorless gas FDA approved as an induction agent for dental sedation
3
Total3

Baseline characteristics

CharacteristicNitrous Oxide
Age, Continuous40 years
STANDARD_DEVIATION 6.5
Ethnicity (NIH/OMB)
Hispanic or Latino
0 Participants
Ethnicity (NIH/OMB)
Not Hispanic or Latino
3 Participants
Ethnicity (NIH/OMB)
Unknown or Not Reported
0 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants
Race (NIH/OMB)
Asian
0 Participants
Race (NIH/OMB)
Black or African American
0 Participants
Race (NIH/OMB)
More than one race
0 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants
Race (NIH/OMB)
White
3 Participants
Sex: Female, Male
Female
0 Participants
Sex: Female, Male
Male
3 Participants

Adverse events

Event typeEG000
affected / at risk
deaths
Total, all-cause mortality
0 / 3
other
Total, other adverse events
2 / 3
serious
Total, serious adverse events
0 / 3

Outcome results

Primary

Number of Patients Who Met and Exceeded Response Criteria of Clinician Administered PTSD Scale for DSM-5 (CAPS-5)

Patients given CAPS-5 (Clinician Administered PTSD Scale for DSM-5), a 30-item structured interview that can be used to assess PTSD symptoms over the past week. For the CAPS-5 the minimum units are 0 and maximum units on the total scale are 80. The higher the number on the CAPS-5, the more severe the symptoms. Response was defined as at least a 12 point reduction on the CAPS-5

Time frame: Baseline and 1 week post inhalation

Population: 3 Veteran outpatients ages 31, 43, and 46 who met PTSD criteria of at least moderate symptoms severity (CAPS-5 score equal or greater than 40)

ArmMeasureValue (COUNT_OF_PARTICIPANTS)
Nitrous OxideNumber of Patients Who Met and Exceeded Response Criteria of Clinician Administered PTSD Scale for DSM-5 (CAPS-5)2 Participants

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026