22
Participants
Start Date
April 30, 1996
Primary Completion Date
November 30, 1997
Study Completion Date
November 30, 1997
Nitrous oxide 10% & placebo
Nitrous oxide 20% & placebo
Nitrous oxide 30% & placebo
Nitrous oxide 40% and placebo
University of Chicago, Anesthesia & Critical Care, Chicago
National Institute on Drug Abuse (NIDA)
NIH
University of Chicago
OTHER