{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Analgesic+Efficacy&page=4",
    "query": {
      "condition": "Analgesic Efficacy",
      "page": 4
    },
    "page_size": 10
  },
  "pagination": {
    "page": 4,
    "page_size": 10,
    "total_count": 247,
    "total_pages": 25,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Analgesic+Efficacy&page=5&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Analgesic+Efficacy&page=3&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-09T14:28:44.387Z",
  "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": "NCT05991687",
      "title": "Methods for Effective Disposal of Surplus Analgesics to Facilitate Elimination",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Surgery",
        "Analgesics, Opioids"
      ],
      "interventions": [
        {
          "name": "In-home drug disposal pouch",
          "type": "OTHER"
        },
        {
          "name": "Mail-in prepaid envelope",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Michigan",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 200,
      "start_date": "2023-07-31",
      "completion_date": "2026-09-04",
      "has_results": false,
      "last_update_posted_date": "2026-09-10",
      "last_synced_at": "2026-10-09T14:28:44.387Z",
      "location_count": 1,
      "location_summary": "Ann Arbor, Michigan",
      "locations": [
        {
          "city": "Ann Arbor",
          "state": "Michigan"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05991687"
    },
    {
      "nct_id": "NCT01789476",
      "title": "A Phase 2 Study to Evaluate Analgesic Effect of IV CR845 For Pain Following Bunionectomy Surgery",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Acute Pain"
      ],
      "interventions": [
        {
          "name": "CR845",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Cara Therapeutics, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 51,
      "start_date": "2013-05",
      "completion_date": "2013-08",
      "has_results": true,
      "last_update_posted_date": "2015-04-30",
      "last_synced_at": "2026-10-09T14:28:44.387Z",
      "location_count": 1,
      "location_summary": "Salt Lake City, Utah",
      "locations": [
        {
          "city": "Salt Lake City",
          "state": "Utah"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01789476"
    },
    {
      "nct_id": "NCT01755546",
      "title": "Long-term Open-Label Safety Study to Evaluate EN3409",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Low Back Pain",
        "Osteoarthritis",
        "Neuropathic Pain"
      ],
      "interventions": [
        {
          "name": "EN3409",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "BioDelivery Sciences International",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 304,
      "start_date": "2012-12",
      "completion_date": "2014-11",
      "has_results": true,
      "last_update_posted_date": "2018-10-18",
      "last_synced_at": "2026-10-09T14:28:44.387Z",
      "location_count": 57,
      "location_summary": "Birmingham, Alabama • Mobile, Alabama • Phoenix, Arizona + 52 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Mobile",
          "state": "Alabama"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Anaheim",
          "state": "California"
        },
        {
          "city": "Escondido",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01755546"
    },
    {
      "nct_id": "NCT03783910",
      "title": "Efficacy and Safety of GRT9906 Tablets Compared to Placebo in Patients With Fibromyalgia",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Primary Fibromyalgia"
      ],
      "interventions": [
        {
          "name": "GRT9906",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Grünenthal GmbH",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 90,
      "start_date": "2005-09-19",
      "completion_date": "2006-10-20",
      "has_results": false,
      "last_update_posted_date": "2018-12-21",
      "last_synced_at": "2026-10-09T14:28:44.387Z",
      "location_count": 6,
      "location_summary": "DeLand, Florida • Charlotte, North Carolina • Medford, Oregon + 2 more",
      "locations": [
        {
          "city": "DeLand",
          "state": "Florida"
        },
        {
          "city": "Charlotte",
          "state": "North Carolina"
        },
        {
          "city": "Medford",
          "state": "Oregon"
        },
        {
          "city": "Portland",
          "state": "Oregon"
        },
        {
          "city": "San Antonio",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03783910"
    },
    {
      "nct_id": "NCT01892709",
      "title": "Titration of Intravenous Hydromorphone",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Acute Severe Pain"
      ],
      "interventions": [
        {
          "name": "Hydromorphone",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Montefiore Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "64 Years",
        "sex": "ALL",
        "summary": "21 Years to 64 Years"
      },
      "enrollment_count": 215,
      "start_date": "2013-06",
      "completion_date": "2014-04",
      "has_results": true,
      "last_update_posted_date": "2023-05-31",
      "last_synced_at": "2026-10-09T14:28:44.387Z",
      "location_count": 1,
      "location_summary": "The Bronx, New York",
      "locations": [
        {
          "city": "The Bronx",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01892709"
    },
    {
      "nct_id": "NCT01228838",
      "title": "Study of NGX-1998 for the Treatment of Postherpetic Neuralgia",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Postherpetic Neuralgia",
        "Pain"
      ],
      "interventions": [
        {
          "name": "NGX-1998",
          "type": "DRUG"
        },
        {
          "name": "Placebo Liquid",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "NeurogesX",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "90 Years",
        "sex": "ALL",
        "summary": "18 Years to 90 Years"
      },
      "enrollment_count": 183,
      "start_date": "2010-10",
      "completion_date": "2011-09",
      "has_results": false,
      "last_update_posted_date": "2012-09-10",
      "last_synced_at": "2026-10-09T14:28:44.387Z",
      "location_count": 35,
      "location_summary": "Huntsville, Alabama • Tucson, Arizona • Irvine, California + 32 more",
      "locations": [
        {
          "city": "Huntsville",
          "state": "Alabama"
        },
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Irvine",
          "state": "California"
        },
        {
          "city": "La Jolla",
          "state": "California"
        },
        {
          "city": "Napa",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01228838"
    },
    {
      "nct_id": "NCT00366444",
      "title": "Multicenter Study to Evaluate the Analgesic Efficacy of XP21L in Subjects With Pain Following Bunionectomy Surgery",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Pain, Postoperative"
      ],
      "interventions": [
        {
          "name": "diclofenac potassium (XP21L)",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Xanodyne Pharmaceuticals",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 201,
      "start_date": "2006-08",
      "completion_date": null,
      "has_results": true,
      "last_update_posted_date": "2011-04-13",
      "last_synced_at": "2026-10-09T14:28:44.387Z",
      "location_count": 6,
      "location_summary": "Anaheim, California • Orange, California • Owings Mills, Maryland + 3 more",
      "locations": [
        {
          "city": "Anaheim",
          "state": "California"
        },
        {
          "city": "Orange",
          "state": "California"
        },
        {
          "city": "Owings Mills",
          "state": "Maryland"
        },
        {
          "city": "Pasadena",
          "state": "Maryland"
        },
        {
          "city": "Altoona",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00366444"
    },
    {
      "nct_id": "NCT01514175",
      "title": "A Pilot Study Comparing the Analgesic Efficacy of IV Ibuprofen and IV Ketorolac",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Chronic Pelvic Pain"
      ],
      "interventions": [
        {
          "name": "IV Ibuprofen",
          "type": "DRUG"
        },
        {
          "name": "IV Ketorolac",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Culpeper Surgery Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "FEMALE",
        "summary": "18 Years to 65 Years · Female only"
      },
      "enrollment_count": 50,
      "start_date": "2012-01",
      "completion_date": "2012-12",
      "has_results": false,
      "last_update_posted_date": "2012-05-16",
      "last_synced_at": "2026-10-09T14:28:44.387Z",
      "location_count": 1,
      "location_summary": "Culpeper, Virginia",
      "locations": [
        {
          "city": "Culpeper",
          "state": "Virginia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01514175"
    },
    {
      "nct_id": "NCT00115752",
      "title": "Genetic Basis For Variation In NSAID Analgesia In A Clinical Model Of Acute Pain",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Pain"
      ],
      "interventions": [
        {
          "name": "Valdecoxib",
          "type": "DRUG"
        },
        {
          "name": "COX Inhibitor",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "National Institute of Nursing Research (NINR)",
      "sponsor_class": "NIH",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "7 Years",
        "maximum_age": "35 Years",
        "sex": "ALL",
        "summary": "7 Years to 35 Years"
      },
      "enrollment_count": 96,
      "start_date": "2005-06-20",
      "completion_date": "2006-10-04",
      "has_results": false,
      "last_update_posted_date": "2017-07-02",
      "last_synced_at": "2026-10-09T14:28:44.387Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00115752"
    },
    {
      "nct_id": "NCT07336355",
      "title": "Feasibility of an Analgesic Device Enabling Local Anesthetic Delivery and Neuromodulation After Knee Surgery",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Knee Arthropathy"
      ],
      "interventions": [
        {
          "name": "Percutaneous peripheral nerve stimulation",
          "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": 0,
      "start_date": "2026-03-14",
      "completion_date": "2026-03-14",
      "has_results": false,
      "last_update_posted_date": "2026-03-17",
      "last_synced_at": "2026-10-09T14:28:44.387Z",
      "location_count": 1,
      "location_summary": "La Jolla, California",
      "locations": [
        {
          "city": "La Jolla",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07336355"
    }
  ]
}