{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Nitrous+oxide+and+placebo",
    "query": {
      "intervention": "Nitrous oxide and placebo"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 30,
    "total_pages": 3,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Nitrous+oxide+and+placebo&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-30T14:47:44.474Z",
  "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": "NCT06069154",
      "title": "Ultrasound-Guided Percutaneous Cryoneurolysis to Treat Pain Following Thoracic Trauma",
      "overall_status": "ENROLLING_BY_INVITATION",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Rib Fracture",
        "Rib Fracture Multiple"
      ],
      "interventions": [
        {
          "name": "Cryoneurolysis",
          "type": "DEVICE"
        },
        {
          "name": "Local anesthetic peripheral nerve block",
          "type": "PROCEDURE"
        },
        {
          "name": "Sham Cryoneurolysis",
          "type": "DEVICE"
        },
        {
          "name": "Sham peripheral nerve block",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "DEVICE",
        "PROCEDURE"
      ],
      "sponsor": "University of California, San Diego",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 120,
      "start_date": "2023-10-30",
      "completion_date": "2028-12",
      "has_results": false,
      "last_update_posted_date": "2026-08-24",
      "last_synced_at": "2026-09-30T14:47:44.474Z",
      "location_count": 5,
      "location_summary": "La Jolla, California • Bethesda, Maryland • Boston, Massachusetts + 1 more",
      "locations": [
        {
          "city": "La Jolla",
          "state": "California"
        },
        {
          "city": "Bethesda",
          "state": "Maryland"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Houston",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06069154"
    },
    {
      "nct_id": "NCT00655980",
      "title": "Vitamins in Nitrous Oxide Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Major Surgery",
        "Coronary Artery Disease"
      ],
      "interventions": [
        {
          "name": "Vitamin B12 and folic acid",
          "type": "DRUG"
        },
        {
          "name": "Nitrous oxide and placebo",
          "type": "DRUG"
        },
        {
          "name": "standard of care",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Washington University School of Medicine",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 687,
      "start_date": "2008-02",
      "completion_date": "2016-12",
      "has_results": true,
      "last_update_posted_date": "2020-10-01",
      "last_synced_at": "2026-09-30T14:47:44.474Z",
      "location_count": 1,
      "location_summary": "St Louis, Missouri",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00655980"
    },
    {
      "nct_id": "NCT05357040",
      "title": "Antidepressant Effects of Nitrous Oxide",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Major Depressive Disorder",
        "Treatment Resistant Depression"
      ],
      "interventions": [
        {
          "name": "Nitrous oxide gas for inhalation",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Chicago",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 0,
      "start_date": "2021-06-30",
      "completion_date": "2026-02-27",
      "has_results": false,
      "last_update_posted_date": "2026-05-14",
      "last_synced_at": "2026-09-30T14:47:44.474Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05357040"
    },
    {
      "nct_id": "NCT02139540",
      "title": "Nitrous Oxide as Treatment for Major Depression - a Pilot Study",
      "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": "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": 21,
      "start_date": "2012-11",
      "completion_date": "2015-04",
      "has_results": true,
      "last_update_posted_date": "2020-01-27",
      "last_synced_at": "2026-09-30T14:47:44.474Z",
      "location_count": 1,
      "location_summary": "St Louis, Missouri",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02139540"
    },
    {
      "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": "2026-09-30T14:47:44.474Z",
      "location_count": 1,
      "location_summary": "St Louis, Missouri",
      "locations": [
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03365011"
    },
    {
      "nct_id": "NCT03449667",
      "title": "Cryoanalgesia to Treat Post-Amputation Phantom Limb Pain: A Department of Defense Funded Multicenter Study",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Post-Amputation Phantom Limb Pain"
      ],
      "interventions": [
        {
          "name": "Cryoneurolysis",
          "type": "DEVICE"
        },
        {
          "name": "Sham Comparator",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "University of California, San Diego",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 144,
      "start_date": "2018-03-23",
      "completion_date": "2022-03-17",
      "has_results": true,
      "last_update_posted_date": "2023-02-17",
      "last_synced_at": "2026-09-30T14:47:44.474Z",
      "location_count": 6,
      "location_summary": "Palo Alto, California • San Diego, California • Gainesville, Florida + 2 more",
      "locations": [
        {
          "city": "Palo Alto",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "San Diego",
          "state": "California"
        },
        {
          "city": "Gainesville",
          "state": "Florida"
        },
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03449667"
    },
    {
      "nct_id": "NCT01736020",
      "title": "Developing Anesthesia as Post Traumatic Stress Disorder (PTSD) Therapy",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Healthy"
      ],
      "interventions": [
        {
          "name": "Dexmedetomidine",
          "type": "DRUG"
        },
        {
          "name": "Propofol",
          "type": "DRUG"
        },
        {
          "name": "Ketamine",
          "type": "DRUG"
        },
        {
          "name": "Nitrous Oxide",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Southern California Institute for Research and Education",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "35 Years",
        "sex": "ALL",
        "summary": "18 Years to 35 Years"
      },
      "enrollment_count": 293,
      "start_date": "2009-09",
      "completion_date": "2017-04",
      "has_results": false,
      "last_update_posted_date": "2016-10-13",
      "last_synced_at": "2026-09-30T14:47:44.474Z",
      "location_count": 1,
      "location_summary": "Irvine, California",
      "locations": [
        {
          "city": "Irvine",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01736020"
    },
    {
      "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": "2026-09-30T14:47:44.474Z",
      "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": "2026-09-30T14:47:44.474Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00000262"
    },
    {
      "nct_id": "NCT05357066",
      "title": "Nitrous Oxide as Treatment for Fibromyalgia",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Fibromyalgia",
        "Central Neuropathic Pain"
      ],
      "interventions": [
        {
          "name": "Nitrous oxide gas for inhalation",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of Chicago",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 0,
      "start_date": "2021-11-12",
      "completion_date": "2026-02-27",
      "has_results": false,
      "last_update_posted_date": "2026-05-14",
      "last_synced_at": "2026-09-30T14:47:44.474Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05357066"
    }
  ]
}