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 determine
effects of alcohol history on the reinforcing, subjective and psychomotor effects of nitrous
oxide in healthy volunteers.
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