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NCT00000249 · ClinicalTrials.gov registry record · Phase 2
Effects of Subanesthetic Concentrations of Nitrous Oxide - 1
A Phase 2 study, sponsored by University of Chicago.
- Completed
- Registry status
- Phase 2
- Development phase
- 10
- Enrollment target
NCT00000249: Completed Phase 2 study, sponsored by University of Chicago.
NCT00000249 is a Phase 2 study that has completed, run by University of Chicago. The registered enrollment target is 10 participants, below the 133-participant average among 30,622 other Phase 2 trials with a reported enrollment target (92% lower). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT00000249, a Phase 2 study, has completed, sponsored by University of Chicago.
- COMPLETED
- Registry status
- Phase 2
- Development phase
- 10 participants
- Enrollment target
Study 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. To examine effects of subanesthetic concentrations of nitrous oxide on cold-pressor pain in humans.
Primary Outcome
Subjects immersed non-dominant arm for 3 minutes twice in 2-3 degree C water while inhaling 0 (placebo), 20, 30, or 40% N2O for a total of 40 minutes
Interventions
- DRUG 40% N2O
- DRUG 20% N2O
- DRUG 30% N2O
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 10 participants |
| Start Date | 1993-09 |
| Est. Completion | 1995-06 |
| Phase | Phase 2 |
What the finished NCT00000249 record still lists
NCT00000249 is an interventional study that assigns participants to a tested intervention. The registry caps enrollment at 10 participants, a relatively small participant target, below the 133-participant average among 30,622 other Phase 2 trials with a reported enrollment target (92% lower).
The record links to 0 conditions, and to 3 interventions - of which 40% N2O is the first listed.
NCT00000249 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT00000249 about?
NCT00000249 is a clinical study titled "Effects of Subanesthetic Concentrations of Nitrous Oxide - 1". 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. To examine effects of subanesthetic conce...
What is the current status of trial NCT00000249?
This trial is currently completed. It is a Phase 2 study. The enrollment target is 10 participants. The study started on 1993-09. Estimated completion is 1995-06.
What interventions are being tested in trial NCT00000249?
The interventions under investigation include: 40% N2O (DRUG), 20% N2O (DRUG), 30% N2O (DRUG).
Who is sponsoring clinical trial NCT00000249?
This trial is sponsored by University of Chicago, which has 796 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT00000249's enrollment target sits among peer trials
10 1968th of 2000 higher than 12 of 2,000 other Phase 2 trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other Phase 2 trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source ClinicalTrials.gov registry export · 2026-08-08
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