Reinforcing Effects of Brief Exposures to Nitrous Oxide - 8

Not Applicable

Completed

• Conditions: Opioid-Related Disorders; Substance-Related Disorders
• Interventions: Drug: 80% N2O; Drug: 20% N2O; Drug: 40% N2O; Drug: 60% N2O

• Registration Number: NCT00000256
• Lead Sponsor: University of Chicago

Brief Summary

The purpose of this study is to conduct experiments to examine subjective and reinforcing effects of nitrous oxide. Mood altering and psychomotor effects will be tested on non-drug abusers and preference procedures will be used to assess reinforcing effects. Comparisons between nitrous oxide, opiates, and benzodiazepine antagonists will be made. To examine reinforcing effects of brief exposures to nitrous oxide in healthy volunteers.

Detailed Description

Not available

Study Timeline

• Study Start: 1995-08
• Primary Completion: 1996-11
• Study Completion: 1996-11
• Study First Submitted: 1999-09-20
• Study First Submitted QC: 1999-09-20
• Study First Posted: 1999-09-21
• Status Verified: 2015-05
• Last Update Submitted: 2015-05-26
• Last Update Posted: 2015-05-28

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 11

Inclusion Criteria

Not provided

Exclusion Criteria

Not provided

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: CROSSOVER

Arm && Interventions

Group	Intervention	Description
Placebo + 80% N2O	80% N2O	0% N2O inhaled during psychomotor testing, 80% N2O inhaled during psycho motor testing, then subject's choice of the 2.
Placebo + 20% N2O	20% N2O	0% N2O inhaled during psychomotor testing, 20% N2O inhaled during psycho motor testing, then subject's choice of the 2.
Placebo + 40% N2O	40% N2O	0% N2O inhaled during psychomotor testing, 40% N2O inhaled during psycho motor testing, then subject's choice of the 2.
Placebo + 60% N2O	60% N2O	0% N2O inhaled during psychomotor testing, 60% N2O inhaled during psycho motor testing, then subject's choice of the 2.

Primary Outcome Measures

Name	Time	Method
Choice of nitrous oxide vs placebo	After 1.5 min of inhalation each of nitrous oxide then placebo	Subjects underwent 4 sessions consisting of 2 sample tests (inhaling placebo and inhaling varying doses of N2O), then choosing which inhalant they wanted for a choice test. The subject \& the technician administering the inhalant were blinded. During each intervention and each session, subjects underwent psychomotor testing.

Trial Locations

Locations (1)

University of Chicago, Anesthesia & Critical Care; 🇺🇸 Chicago, Illinois, United States