{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Inhaled+Nitrous+Oxide&page=2",
    "query": {
      "intervention": "Inhaled Nitrous Oxide",
      "page": 2
    },
    "page_size": 10
  },
  "pagination": {
    "page": 2,
    "page_size": 10,
    "total_count": 10,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Inhaled+Nitrous+Oxide&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-09-27T02:14:33.902Z",
  "attribution": "Data derived from public ClinicalTrials.gov records. The official record at https://clinicaltrials.gov/ remains the source of truth for current availability, contacts, and full study details.",
  "notes": [
    "This endpoint exposes only public summary fields — no participant contact emails, phone numbers, or scraped investigator contact details.",
    "For contact information and full protocol detail, follow each trial's `official_url` to the ClinicalTrials.gov record.",
    "This API is a navigational aid. It does not provide medical advice, eligibility determinations, or compensation guarantees."
  ],
  "trials": [
    {
      "nct_id": "NCT03879538",
      "title": "Nitrous Oxide for the Treatment of Complex Regional Pain Syndrome",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Complex Regional Pain Syndrome"
      ],
      "interventions": [
        {
          "name": "Nitrous Oxide",
          "type": "DRUG"
        },
        {
          "name": "Oxygen",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "The Cleveland Clinic",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 44,
      "start_date": "2019-07-02",
      "completion_date": "2022-07-28",
      "has_results": true,
      "last_update_posted_date": "2024-02-09",
      "last_synced_at": "2026-09-27T02:14:33.902Z",
      "location_count": 1,
      "location_summary": "Cleveland, Ohio",
      "locations": [
        {
          "city": "Cleveland",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03879538"
    },
    {
      "nct_id": "NCT03736538",
      "title": "Nitrous Oxide- Suicidal Ideation",
      "overall_status": "ENROLLING_BY_INVITATION",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Major Depressive Disorder",
        "Depression",
        "Mood Disorders",
        "Suicidal Ideation"
      ],
      "interventions": [
        {
          "name": "Nitrous Oxide",
          "type": "DRUG"
        },
        {
          "name": "Placebo gas",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Washington University School of Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 50,
      "start_date": "2018-10-30",
      "completion_date": "2026-12",
      "has_results": false,
      "last_update_posted_date": "2025-12-22",
      "last_synced_at": "2026-09-27T02:14:33.902Z",
      "location_count": 1,
      "location_summary": "St Louis, Missouri",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03736538"
    },
    {
      "nct_id": "NCT03869736",
      "title": "Nitrous Oxide for the Treatment of Major Depressive Disorder",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Depression",
        "Major Depressive Disorder"
      ],
      "interventions": [
        {
          "name": "Nitrous Oxide",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Bayside Health",
      "sponsor_class": "OTHER_GOV",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 81,
      "start_date": "2019-01-22",
      "completion_date": "2023-12-10",
      "has_results": false,
      "last_update_posted_date": "2024-12-16",
      "last_synced_at": "2026-09-27T02:14:33.902Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03869736"
    },
    {
      "nct_id": "NCT00000258",
      "title": "Role of Instructions in Nitrous Oxide Effects and Choice - 10",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Opioid-Related Disorders",
        "Substance-Related Disorders"
      ],
      "interventions": [
        {
          "name": "Nitrous oxide 10% & placebo",
          "type": "DRUG"
        },
        {
          "name": "Nitrous oxide 20% & placebo",
          "type": "DRUG"
        },
        {
          "name": "Nitrous oxide 30% & placebo",
          "type": "DRUG"
        },
        {
          "name": "Nitrous oxide 40% and placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Chicago",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "32 Years",
        "sex": "ALL",
        "summary": "21 Years to 32 Years"
      },
      "enrollment_count": 22,
      "start_date": "1996-04",
      "completion_date": "1997-11",
      "has_results": false,
      "last_update_posted_date": "2015-05-28",
      "last_synced_at": "2026-09-27T02:14:33.902Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00000258"
    },
    {
      "nct_id": "NCT00000262",
      "title": "Effects of Combined Sevoflurane and Nitrous Oxide Inhalation - 14",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Opioid-Related Disorders",
        "Substance-Related Disorders"
      ],
      "interventions": [
        {
          "name": "30% Nitrous oxide",
          "type": "DRUG"
        },
        {
          "name": "0.4% Sevoflurane",
          "type": "DRUG"
        },
        {
          "name": "0.2% sevoflurane",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "University of Chicago",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 20,
      "start_date": "1996-11",
      "completion_date": "1999-02",
      "has_results": false,
      "last_update_posted_date": "2015-05-27",
      "last_synced_at": "2026-09-27T02:14:33.902Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00000262"
    },
    {
      "nct_id": "NCT04089852",
      "title": "Nitrous Oxide for Pain Management During IUD Insertion in Nulliparous Adolescent Women",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "Contraceptive Devices",
        "Long-Acting Reversible Contraception",
        "Analgesia",
        "Adolescent Health",
        "Gynecology"
      ],
      "interventions": [
        {
          "name": "Nitrous oxide gas for inhalation",
          "type": "DRUG"
        },
        {
          "name": "Oxygen Gas for Inhalation",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Boston Children's Hospital",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "14 Years",
        "maximum_age": "24 Years",
        "sex": "FEMALE",
        "summary": "14 Years to 24 Years · Female only"
      },
      "enrollment_count": 0,
      "start_date": "2021-06-01",
      "completion_date": "2021-11-01",
      "has_results": false,
      "last_update_posted_date": "2022-09-16",
      "last_synced_at": "2026-09-27T02:14:33.902Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04089852"
    },
    {
      "nct_id": "NCT00000252",
      "title": "Lack of Acute Tolerance Development to Effects of Nitrous Oxide - 4",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Opioid-Related Disorders",
        "Substance-Related Disorders"
      ],
      "interventions": [
        {
          "name": "0% N2O",
          "type": "DRUG"
        },
        {
          "name": "10% N2O",
          "type": "DRUG"
        },
        {
          "name": "20% N2O",
          "type": "DRUG"
        },
        {
          "name": "30% N2O",
          "type": "DRUG"
        },
        {
          "name": "40% N2O",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Chicago",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "29 Years",
        "sex": "ALL",
        "summary": "21 Years to 29 Years"
      },
      "enrollment_count": 11,
      "start_date": "1994-06",
      "completion_date": "1996-06",
      "has_results": false,
      "last_update_posted_date": "2015-05-28",
      "last_synced_at": "2026-09-27T02:14:33.902Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00000252"
    },
    {
      "nct_id": "NCT03365011",
      "title": "Nitrous Oxide Treatment for Tinnitus",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Tinnitus"
      ],
      "interventions": [
        {
          "name": "Nitrous oxide gas for inhalation",
          "type": "DRUG"
        },
        {
          "name": "Placebo gas for inhalation",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Washington University School of Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 40,
      "start_date": "2016-10",
      "completion_date": "2017-07",
      "has_results": true,
      "last_update_posted_date": "2018-12-14",
      "last_synced_at": "2026-09-27T02:14:33.902Z",
      "location_count": 1,
      "location_summary": "St Louis, Missouri",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03365011"
    },
    {
      "nct_id": "NCT04083105",
      "title": "Nitrous Oxide Prior to Intranasal Midazolam for Moderate Dental Sedation in Pediatric Patients",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Dental Anxiety",
        "Pain"
      ],
      "interventions": [
        {
          "name": "Nitrous Oxide",
          "type": "DRUG"
        },
        {
          "name": "Midazolam",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Children's Hospital Colorado",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "3 Years",
        "maximum_age": "8 Years",
        "sex": "ALL",
        "summary": "3 Years to 8 Years"
      },
      "enrollment_count": 150,
      "start_date": "2019-07-12",
      "completion_date": "2021-07-11",
      "has_results": false,
      "last_update_posted_date": "2019-09-10",
      "last_synced_at": "2026-09-27T02:14:33.902Z",
      "location_count": 1,
      "location_summary": "Aurora, Colorado",
      "locations": [
        {
          "city": "Aurora",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04083105"
    },
    {
      "nct_id": "NCT02757521",
      "title": "Nitrous TRD Bipolar Depression",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Treatment- Resistant Bipolar Disorder",
        "Bipolar Disorder",
        "Bipolar Depressive Disorder"
      ],
      "interventions": [
        {
          "name": "Nitrous Oxide",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Washington University School of Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 1,
      "start_date": "2016-03-25",
      "completion_date": "2016-12-06",
      "has_results": true,
      "last_update_posted_date": "2019-07-05",
      "last_synced_at": "2026-09-27T02:14:33.902Z",
      "location_count": 1,
      "location_summary": "St Louis, Missouri",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02757521"
    }
  ]
}