22 studies were found.

1.		Completed	Cold Water Immersion Modulates Reinforcing Effects of Nitrous Oxide - 2 Conditions: Opioid-Related Disorders; Substance-Related Disorders
2.		Recruiting	Combination of Capecitabine and GTI-2040 in the Treatment of Renal Cell Carcinoma Conditions: Carcinoma, Renal Cell; Metastases, Neoplasm
3.		Completed	Differential Acute Tolerance Development to Effects of Nitrous Oxide - 7 Conditions: Opioid-Related Disorders; Substance-Related Disorders
4.		Completed	Effects of Alcohol History on Effects of Nitrous Oxide - 9 Conditions: Alcohol-Related Disorders; Opioid-Related Disorders; Substance-Related Disorders
5.		Completed	Effects of Alcohol History on Effects of Sevoflurane and Nitrous Oxide - 13 Conditions: Alcohol-Related Disorders; Opioid-Related Disorders; Substance-Related Disorders
6.		Completed	Effects of Behavioral Contingencies on Effects of Nitrous Oxide - 12 Conditions: Opioid-Related Disorders; Substance-Related Disorders
7.		Completed	Effects of Combined Alcohol and Nitrous Oxide Intake - 15 Conditions: Opioid-Related Disorders; Substance-Related Disorders
8.		Completed	Effects of Combined Sevoflurane and Nitrous Oxide Inhalation - 14 Conditions: Opioid-Related Disorders; Substance-Related Disorders
9.		Completed	Effects of Nitrous Oxide: A Dose-Response Analysis - 5 Conditions: Opioid-Related Disorders; Substance-Related Disorders
10.		Completed	Effects of Subanesthetic Concentrations of Isoflurane/Nitrous Oxide - 3 Conditions: Opioid-Related Disorders; Substance-Related Disorders
11.		Completed	Effects of Subanesthetic Concentrations of Nitrous Oxide - 1 Conditions: Opioid-Related Disorders; Substance-Related Disorders
12.		Completed	Isoflurane at Subanesthetic Concentrations - 6 Conditions: Opioid-Related Disorders; Substance-Related Disorders
13.		Completed	Lack of Acute Tolerance Development to Effects of Nitrous Oxide - 4 Conditions: Opioid-Related Disorders; Substance-Related Disorders
14.		Recruiting	Leuprolide in Determining the Cause of Gonadotropin Deficiency Condition: Hypogonadism
15.		Recruiting	Leuprolide in Treating Adults With Hypogonadotropism Condition: Hypogonadism
16.		Recruiting	Pyrimethamine, Sulfadiazine, and Leucovorin in Treating Patients With Congenital Toxoplasmosis Condition: Toxoplasmosis
17.		Completed	Reinforcing Effects of Brief Exposures to Nitrous Oxide - 8 Conditions: Opioid-Related Disorders; Substance-Related Disorders
18.		Completed	Role of Instructions in Nitrous Oxide Effects and Choice - 10 Conditions: Opioid-Related Disorders; Substance-Related Disorders
19.		Completed	Sevoflurane vs Isoflurane Inhalation at Subanesthetic Concentrations - 11 Conditions: Opioid-Related Disorders; Substance-Related Disorders
20.		Completed	Subjective Effects of Nitrous Oxide in Dental Patients - 17 Conditions: Opioid-Related Disorders; Substance-Related Disorders
21.		Completed	Subjective/Psychomotor/ Effects of Combined Alcohol & Nitrous Oxide - 16 Conditions: Opioid-Related Disorders; Substance-Related Disorders
22.		Recruiting	Vaccine study of MVA-MUC1-IL2 in patients with Prostate Cancer Condition: Prostatic Neoplasms