{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=4975",
    "query": {
      "intervention": "4975"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 7,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-10T12:14:25.925Z",
  "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": "NCT02678793",
      "title": "A Study to Evaluate the Safety and Efficacy of CNTX-4975 in Subjects With Painful Intermetatarsal Neuroma (Morton's Neuroma)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Morton's Neuroma"
      ],
      "interventions": [
        {
          "name": "CNTX-4975",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Centrexion Therapeutics",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 67,
      "start_date": "2015-12",
      "completion_date": "2017-03",
      "has_results": false,
      "last_update_posted_date": "2018-05-09",
      "last_synced_at": "2026-09-10T12:14:25.925Z",
      "location_count": 10,
      "location_summary": "Phoenix, Arizona • Jonesboro, Arkansas • El Cajon, California + 7 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Jonesboro",
          "state": "Arkansas"
        },
        {
          "city": "El Cajon",
          "state": "California"
        },
        {
          "city": "Pasadena",
          "state": "Maryland"
        },
        {
          "city": "City of Saint Peters",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02678793"
    },
    {
      "nct_id": "NCT00683267",
      "title": "Efficacy and Safety Study of 4975 in Patients Undergoing Total Hip Replacement",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Arthroplasty"
      ],
      "interventions": [
        {
          "name": "4975, highly purified capsaicin",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Anesiva, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "18 Years to 85 Years"
      },
      "enrollment_count": 118,
      "start_date": "2007-09",
      "completion_date": "2008-12",
      "has_results": false,
      "last_update_posted_date": "2009-05-04",
      "last_synced_at": "2026-09-10T12:14:25.925Z",
      "location_count": 10,
      "location_summary": "Birmingham, Alabama • Arcadia, California • Glendale, California + 7 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Arcadia",
          "state": "California"
        },
        {
          "city": "Glendale",
          "state": "California"
        },
        {
          "city": "Oakland",
          "state": "California"
        },
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00683267"
    },
    {
      "nct_id": "NCT00132392",
      "title": "ALGRX 4975 After Total Knee Replacement",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Arthroplasty, Replacement, Knee",
        "Knee Injuries"
      ],
      "interventions": [
        {
          "name": "ALGRX 4975",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "AlgoRx Pharmaceuticals",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "35 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "35 Years to 80 Years"
      },
      "enrollment_count": 40,
      "start_date": "2005-07",
      "completion_date": "2005-12",
      "has_results": false,
      "last_update_posted_date": "2006-12-20",
      "last_synced_at": "2026-09-10T12:14:25.925Z",
      "location_count": 1,
      "location_summary": "Birmingham, Alabama",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00132392"
    },
    {
      "nct_id": "NCT00667654",
      "title": "Safety and Tolerability of 4975 in the Treatment of Moderate to Severe Knee Pain Due to Osteoarthritis (OA)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Osteoarthritis of the Knee"
      ],
      "interventions": [
        {
          "name": "CNTX-4975",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Centrexion Therapeutics",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "40 Years and older"
      },
      "enrollment_count": 54,
      "start_date": "2007-08",
      "completion_date": "2016-08",
      "has_results": false,
      "last_update_posted_date": "2016-12-06",
      "last_synced_at": "2026-09-10T12:14:25.925Z",
      "location_count": 1,
      "location_summary": "Worcester, Massachusetts",
      "locations": [
        {
          "city": "Worcester",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00667654"
    },
    {
      "nct_id": "NCT00656578",
      "title": "Efficacy and Safety Study of 4975 to Manage Pain of Bunionectomy",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Pain"
      ],
      "interventions": [
        {
          "name": "4975",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Anesiva, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 300,
      "start_date": "2008-03",
      "completion_date": "2008-09",
      "has_results": false,
      "last_update_posted_date": "2009-05-04",
      "last_synced_at": "2026-09-10T12:14:25.925Z",
      "location_count": 6,
      "location_summary": "Bakersfield, California • Owings Mills, Maryland • Austin, Texas + 3 more",
      "locations": [
        {
          "city": "Bakersfield",
          "state": "California"
        },
        {
          "city": "Owings Mills",
          "state": "Maryland"
        },
        {
          "city": "Austin",
          "state": "Texas"
        },
        {
          "city": "San Antonio",
          "state": "Texas"
        },
        {
          "city": "San Marcos",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00656578"
    },
    {
      "nct_id": "NCT00130962",
      "title": "ALGRX 4975 in the Treatment of Patients With Morton's Neuroma",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Neuroma"
      ],
      "interventions": [
        {
          "name": "ALGRX 4975",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "AlgoRx Pharmaceuticals",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 60,
      "start_date": "2004-09",
      "completion_date": "2006-02",
      "has_results": false,
      "last_update_posted_date": "2005-10-03",
      "last_synced_at": "2026-09-10T12:14:25.925Z",
      "location_count": 2,
      "location_summary": "Owings Mills, Maryland • Salt Lake City, Utah",
      "locations": [
        {
          "city": "Owings Mills",
          "state": "Maryland"
        },
        {
          "city": "Salt Lake City",
          "state": "Utah"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00130962"
    },
    {
      "nct_id": "NCT00681356",
      "title": "Safety and Efficacy Study of 4975 in Patients Undergoing Total Knee Replacement",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Total Knee Arthroplasty (Replacement)"
      ],
      "interventions": [
        {
          "name": "4975, 15 and 5 mg",
          "type": "DRUG"
        },
        {
          "name": "Placebo Comparator",
          "type": "DRUG"
        },
        {
          "name": "4975 - 5 mg",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Anesiva, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "18 Years to 85 Years"
      },
      "enrollment_count": 214,
      "start_date": "2007-09",
      "completion_date": "2008-12",
      "has_results": false,
      "last_update_posted_date": "2009-05-04",
      "last_synced_at": "2026-09-10T12:14:25.925Z",
      "location_count": 25,
      "location_summary": "Birmingham, Alabama • Mobile, Alabama • Sheffield, Alabama + 20 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Mobile",
          "state": "Alabama"
        },
        {
          "city": "Sheffield",
          "state": "Alabama"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Glendale",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00681356"
    }
  ]
}