{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Carbidopa&page=6",
    "query": {
      "intervention": "Carbidopa",
      "page": 6
    },
    "page_size": 10
  },
  "pagination": {
    "page": 6,
    "page_size": 10,
    "total_count": 136,
    "total_pages": 14,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Carbidopa&page=7&page_size=10",
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=Carbidopa&page=5&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-10-17T15:40:20.716Z",
  "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": "NCT00642356",
      "title": "Carbidopa/Levodopa/Entacapone Versus Immediate Release (IR) Carbidopa/Levodopa on Non-motor Symptoms in Patients With Idiopathic Parkinson's Disease and Demonstrating Non-motor Symptoms of Wearing Off",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Parkinson's Disease"
      ],
      "interventions": [
        {
          "name": "Carbidopa/levodopa/entacapone",
          "type": "DRUG"
        },
        {
          "name": "Immediate release carbidopa/levodopa",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Novartis",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "30 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "30 Years to 85 Years"
      },
      "enrollment_count": 14,
      "start_date": "2008-03",
      "completion_date": "2009-05",
      "has_results": true,
      "last_update_posted_date": "2011-02-18",
      "last_synced_at": "2026-10-17T15:40:20.716Z",
      "location_count": 21,
      "location_summary": "Phoenix, Arizona • Aliso Viejo, California • Irvine, California + 17 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Aliso Viejo",
          "state": "California"
        },
        {
          "city": "Irvine",
          "state": "California"
        },
        {
          "city": "La Jolla",
          "state": "California"
        },
        {
          "city": "Washington D.C.",
          "state": "District of Columbia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00642356"
    },
    {
      "nct_id": "NCT04787965",
      "title": "Opicapone Treatment Initiation Open-Label Study",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Parkinson Disease"
      ],
      "interventions": [
        {
          "name": "Opicapone",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Neurocrine Biosciences",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 239,
      "start_date": "2021-03-01",
      "completion_date": "2022-08-04",
      "has_results": false,
      "last_update_posted_date": "2022-11-28",
      "last_synced_at": "2026-10-17T15:40:20.716Z",
      "location_count": 6,
      "location_summary": "Los Gatos, California • Memphis, Tennessee • Christiansburg, Virginia + 3 more",
      "locations": [
        {
          "city": "Los Gatos",
          "state": "California"
        },
        {
          "city": "Memphis",
          "state": "Tennessee"
        },
        {
          "city": "Christiansburg",
          "state": "Virginia"
        },
        {
          "city": "Norfolk",
          "state": "Virginia"
        },
        {
          "city": "Auburn",
          "state": "Washington"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04787965"
    },
    {
      "nct_id": "NCT04469959",
      "title": "Dopaminergic Dysfunction in Late-Life Depression",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Late Life Depression",
        "Cognitive Decline",
        "Depressive Disorder, Treatment-Resistant",
        "Levodopa",
        "Gait Impairment"
      ],
      "interventions": [
        {
          "name": "L-Dopa",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Vanderbilt University Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "60 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "60 Years and older"
      },
      "enrollment_count": 79,
      "start_date": "2021-02-15",
      "completion_date": "2026-04-29",
      "has_results": false,
      "last_update_posted_date": "2026-08-06",
      "last_synced_at": "2026-10-17T15:40:20.716Z",
      "location_count": 2,
      "location_summary": "Pittsburgh, Pennsylvania • Nashville, Tennessee",
      "locations": [
        {
          "city": "Pittsburgh",
          "state": "Pennsylvania"
        },
        {
          "city": "Nashville",
          "state": "Tennessee"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT04469959"
    },
    {
      "nct_id": "NCT02549573",
      "title": "Outpatient Physical Therapy Intervention in Subjects With Parkinson's Disease Currently Using APOKYN®",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Parkinson's Disease",
        "Motor Symptoms"
      ],
      "interventions": [
        {
          "name": "APOKYN",
          "type": "DRUG"
        },
        {
          "name": "Physical Therapy",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "DRUG",
        "BEHAVIORAL"
      ],
      "sponsor": "MDD US Operations, LLC a subsidiary of Supernus Pharmaceuticals",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "78 Years",
        "sex": "ALL",
        "summary": "18 Years to 78 Years"
      },
      "enrollment_count": 13,
      "start_date": "2016-01",
      "completion_date": "2016-12",
      "has_results": true,
      "last_update_posted_date": "2023-09-01",
      "last_synced_at": "2026-10-17T15:40:20.716Z",
      "location_count": 12,
      "location_summary": "Phoenix, Arizona • Scottsdale, Arizona • Loma Linda, California + 9 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Loma Linda",
          "state": "California"
        },
        {
          "city": "Sunnyvale",
          "state": "California"
        },
        {
          "city": "Orlando",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02549573"
    },
    {
      "nct_id": "NCT03887884",
      "title": "Pharmacokinetic Study of CVT-301 (Levodopa Inhalation Powder)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Parkinson's Disease"
      ],
      "interventions": [
        {
          "name": "CVT-301",
          "type": "DRUG"
        },
        {
          "name": "Sinemet",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Acorda Therapeutics",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "30 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "30 Years to 85 Years"
      },
      "enrollment_count": 23,
      "start_date": "2019-03-05",
      "completion_date": "2019-06-28",
      "has_results": false,
      "last_update_posted_date": "2019-08-02",
      "last_synced_at": "2026-10-17T15:40:20.716Z",
      "location_count": 5,
      "location_summary": "Long Beach, California • Hallandale, Florida • Orlando, Florida + 2 more",
      "locations": [
        {
          "city": "Long Beach",
          "state": "California"
        },
        {
          "city": "Hallandale",
          "state": "Florida"
        },
        {
          "city": "Orlando",
          "state": "Florida"
        },
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "Farmington Hills",
          "state": "Michigan"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03887884"
    },
    {
      "nct_id": "NCT05103618",
      "title": "Effect of Meditation and Controls and Subjects With Parkinson's Disease on Brain Activity Measured by fMRI With FDOPA",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Parkinson Disease",
        "Idiopathic Parkinson Disease"
      ],
      "interventions": [
        {
          "name": "[F-18] Fluorodopa Positron Emission Tomography",
          "type": "DRUG"
        },
        {
          "name": "OM Meditation",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "DRUG",
        "BEHAVIORAL"
      ],
      "sponsor": "Andrew Newberg",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "25 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "25 Years and older"
      },
      "enrollment_count": 0,
      "start_date": "2021-07-08",
      "completion_date": "2025-07-21",
      "has_results": false,
      "last_update_posted_date": "2025-09-19",
      "last_synced_at": "2026-10-17T15:40:20.716Z",
      "location_count": 1,
      "location_summary": "Philadelphia, Pennsylvania",
      "locations": [
        {
          "city": "Philadelphia",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05103618"
    },
    {
      "nct_id": "NCT06075771",
      "title": "Dopaminergic Therapy for Anhedonia - 2",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Anhedonia",
        "Depression"
      ],
      "interventions": [
        {
          "name": "Carbidopa Levodopa",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Emory University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "25 Years",
        "maximum_age": "55 Years",
        "sex": "ALL",
        "summary": "25 Years to 55 Years"
      },
      "enrollment_count": 70,
      "start_date": "2023-11-21",
      "completion_date": "2027-01",
      "has_results": false,
      "last_update_posted_date": "2026-01-28",
      "last_synced_at": "2026-10-17T15:40:20.716Z",
      "location_count": 1,
      "location_summary": "Atlanta, Georgia",
      "locations": [
        {
          "city": "Atlanta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06075771"
    },
    {
      "nct_id": "NCT02577523",
      "title": "A Clinical Study of Efficacy, Safety, Tolerability and PK of ND0612H in Subjects With Advanced Parkinson's Disease",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Parkinson's Disease"
      ],
      "interventions": [
        {
          "name": "ND0612 (Levodopa/Carbidopa solution)",
          "type": "DRUG"
        },
        {
          "name": "ND0612 (Levodopa/Carbidopa solution) + morning oral IR-LD/CD",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "NeuroDerm Ltd.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "30 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "30 Years to 80 Years"
      },
      "enrollment_count": 38,
      "start_date": "2015-12-29",
      "completion_date": "2017-01-31",
      "has_results": true,
      "last_update_posted_date": "2023-05-25",
      "last_synced_at": "2026-10-17T15:40:20.716Z",
      "location_count": 3,
      "location_summary": "Chicago, Illinois • Farmington Hills, Michigan • Cincinnati, Ohio",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        },
        {
          "city": "Farmington Hills",
          "state": "Michigan"
        },
        {
          "city": "Cincinnati",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02577523"
    },
    {
      "nct_id": "NCT00869791",
      "title": "A Study to Compare Pharmacokinetics and Pharmacodynamics of IPX066 to Standard Carbidopa-Levodopa",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Parkinson's Disease"
      ],
      "interventions": [
        {
          "name": "IPX066",
          "type": "DRUG"
        },
        {
          "name": "IR CD-LD",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Impax Laboratories, LLC",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "30 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "30 Years and older"
      },
      "enrollment_count": 27,
      "start_date": "2008-11",
      "completion_date": "2009-06",
      "has_results": true,
      "last_update_posted_date": "2019-11-08",
      "last_synced_at": "2026-10-17T15:40:20.716Z",
      "location_count": 1,
      "location_summary": "Hayward, California",
      "locations": [
        {
          "city": "Hayward",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00869791"
    },
    {
      "nct_id": "NCT01171313",
      "title": "A Efficacy, Safety and Pharmacokinetic Study of XP21279 and Sinemet® in Parkinson's Disease Subjects",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Parkinson's Disease"
      ],
      "interventions": [
        {
          "name": "XP21279 and carbidopa (experimental)",
          "type": "DRUG"
        },
        {
          "name": "Sinemet (comparator)",
          "type": "DRUG"
        },
        {
          "name": "Placebo for XP21279 and carbidopa",
          "type": "DRUG"
        },
        {
          "name": "Placebo for Sinemet",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "XenoPort, Inc.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "30 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "30 Years to 80 Years"
      },
      "enrollment_count": 35,
      "start_date": "2010-07",
      "completion_date": "2011-12",
      "has_results": false,
      "last_update_posted_date": "2021-02-18",
      "last_synced_at": "2026-10-17T15:40:20.716Z",
      "location_count": 12,
      "location_summary": "Phoenix, Arizona • Little Rock, Arkansas • Long Beach, California + 9 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Long Beach",
          "state": "California"
        },
        {
          "city": "Sunnyvale",
          "state": "California"
        },
        {
          "city": "Naples",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01171313"
    }
  ]
}