{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=difelikefalin+0.5+mg",
    "query": {
      "intervention": "difelikefalin 0.5 mg"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 5,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-22T23:48:37.722Z",
  "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": "NCT03617536",
      "title": "A Study to Evaluate the Safety and Efficacy of CR845 in Chronic Kidney Disease Patients With Moderate-to-Severe Pruritus",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Chronic Kidney Diseases",
        "Pruritus"
      ],
      "interventions": [
        {
          "name": "CR845 0.25 mg Oral Tablet",
          "type": "DRUG"
        },
        {
          "name": "CR845 0.5 mg Oral Tablet",
          "type": "DRUG"
        },
        {
          "name": "CR845 1 mg Oral Tablet",
          "type": "DRUG"
        },
        {
          "name": "Placebo Oral Tablet",
          "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": 269,
      "start_date": "2018-07-05",
      "completion_date": "2019-11-14",
      "has_results": true,
      "last_update_posted_date": "2024-01-24",
      "last_synced_at": "2026-09-22T23:48:37.722Z",
      "location_count": 60,
      "location_summary": "Birmingham, Alabama • Florence, Alabama • Phoenix, Arizona + 52 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Florence",
          "state": "Alabama"
        },
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Prescott",
          "state": "Arizona"
        },
        {
          "city": "Sun City",
          "state": "Arizona"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03617536"
    },
    {
      "nct_id": "NCT02542384",
      "title": "A Study Evaluating the Overall Pain Relief and Safety of Intravenous (IV) CR845 in Patients Undergoing Abdominal Surgery",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2",
        "PHASE3"
      ],
      "conditions": [
        "Post Abdominal Surgery Pain"
      ],
      "interventions": [
        {
          "name": "CR845 IV 1 mcg/kg",
          "type": "DRUG"
        },
        {
          "name": "CR845 IV 0.5 mcg/kg",
          "type": "DRUG"
        },
        {
          "name": "Placebo IV",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Cara Therapeutics, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "21 Years and older"
      },
      "enrollment_count": 451,
      "start_date": "2015-09",
      "completion_date": "2018-06",
      "has_results": false,
      "last_update_posted_date": "2019-05-31",
      "last_synced_at": "2026-09-22T23:48:37.722Z",
      "location_count": 23,
      "location_summary": "Sheffield, Alabama • New Haven, Connecticut • Bradenton, Florida + 20 more",
      "locations": [
        {
          "city": "Sheffield",
          "state": "Alabama"
        },
        {
          "city": "New Haven",
          "state": "Connecticut"
        },
        {
          "city": "Bradenton",
          "state": "Florida"
        },
        {
          "city": "Gainesville",
          "state": "Florida"
        },
        {
          "city": "Maitland",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02542384"
    },
    {
      "nct_id": "NCT05387707",
      "title": "Study to Evaluate the Efficacy and Safety of Oral Difelikefalin as Adjunct Therapy to a Topical Corticosteroid for Moderate to Severe Pruritus in Subjects With Atopic Dermatitis",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Pruritus",
        "Atopic Dermatitis"
      ],
      "interventions": [
        {
          "name": "difelikefalin 0.25 mg",
          "type": "DRUG"
        },
        {
          "name": "difelikefalin 0.5 mg",
          "type": "DRUG"
        },
        {
          "name": "TCS Cream",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "Vehicle Cream",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Cara Therapeutics, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 287,
      "start_date": "2022-08-16",
      "completion_date": "2024-02-02",
      "has_results": false,
      "last_update_posted_date": "2024-02-22",
      "last_synced_at": "2026-09-22T23:48:37.722Z",
      "location_count": 61,
      "location_summary": "Scottsdale, Arizona • Fort Smith, Arkansas • Rogers, Arkansas + 56 more",
      "locations": [
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Fort Smith",
          "state": "Arkansas"
        },
        {
          "city": "Rogers",
          "state": "Arkansas"
        },
        {
          "city": "Fountain Valley",
          "state": "California"
        },
        {
          "city": "Lomita",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05387707"
    },
    {
      "nct_id": "NCT04018027",
      "title": "Study to Evaluate the Efficacy and Safety of Oral Difelikefalin (CR845) for Moderate to Severe Pruritus in Subjects With Atopic Dermatitis",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Pruritus",
        "Atopic Dermatitis"
      ],
      "interventions": [
        {
          "name": "difelikefalin 0.25 mg",
          "type": "DRUG"
        },
        {
          "name": "difelikefalin 0.5 mg",
          "type": "DRUG"
        },
        {
          "name": "difelikefalin 1.0 mg",
          "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": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 401,
      "start_date": "2019-06-29",
      "completion_date": "2021-04-01",
      "has_results": false,
      "last_update_posted_date": "2022-04-04",
      "last_synced_at": "2026-09-22T23:48:37.722Z",
      "location_count": 38,
      "location_summary": "Anniston, Alabama • Birmingham, Alabama • Scottsdale, Arizona + 31 more",
      "locations": [
        {
          "city": "Anniston",
          "state": "Alabama"
        },
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Bryant",
          "state": "Arkansas"
        },
        {
          "city": "Fountain Valley",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04018027"
    },
    {
      "nct_id": "NCT04019574",
      "title": "Study to Investigate the Effects of Single Intravenous Doses of Difelikefalin (CR845) on the QTc Interval in Healthy Subjects",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Healthy"
      ],
      "interventions": [
        {
          "name": "CR845 0.5 mcg/kg IV",
          "type": "DRUG"
        },
        {
          "name": "CR845 3 mcg/kg IV",
          "type": "DRUG"
        },
        {
          "name": "Moxifloxacin 400 mg Oral Tablet",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "Cara Therapeutics, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "45 Years",
        "sex": "ALL",
        "summary": "18 Years to 45 Years"
      },
      "enrollment_count": 57,
      "start_date": "2019-06-20",
      "completion_date": "2019-10-29",
      "has_results": false,
      "last_update_posted_date": "2020-02-21",
      "last_synced_at": "2026-09-22T23:48:37.722Z",
      "location_count": 1,
      "location_summary": "Dallas, Texas",
      "locations": [
        {
          "city": "Dallas",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04019574"
    }
  ]
}