{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?q=levodopa",
    "query": {
      "q": "levodopa"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 340,
    "total_pages": 34,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?q=levodopa&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-07-23T22:22:39.363Z",
  "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": "NCT03575195",
      "title": "Microbiota Intervention to Change the Response of Parkinson's Disease",
      "overall_status": "SUSPENDED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Parkinson Disease"
      ],
      "interventions": [
        {
          "name": "Rifaximin",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "sponsor": "University of California, San Francisco",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "30 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "30 Years and older"
      },
      "enrollment_count": 86,
      "start_date": "2019-07-15",
      "completion_date": "2026-08",
      "has_results": false,
      "last_update_posted_date": "2025-09-04",
      "last_synced_at": "2026-07-23T22:22:39.363Z",
      "location_count": 1,
      "location_summary": "San Francisco, California",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03575195"
    },
    {
      "nct_id": "NCT01934998",
      "title": "Parkinsonism in Spinocerebellar Ataxia Type 6",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Spinocerebellar Ataxia Type 6"
      ],
      "interventions": [],
      "intervention_types": [],
      "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": 20,
      "start_date": "2013-07",
      "completion_date": "2015-04",
      "has_results": false,
      "last_update_posted_date": "2015-04-28",
      "last_synced_at": "2026-07-23T22:22:39.363Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01934998"
    },
    {
      "nct_id": "NCT00006337",
      "title": "KW-6002 to Treat Parkinson's Disease",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Parkinson's Disease"
      ],
      "interventions": [
        {
          "name": "KW-6002",
          "type": "DRUG"
        },
        {
          "name": "IV Levodopa",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "National Institute of Neurological Disorders and Stroke (NINDS)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 16,
      "start_date": "2000-10",
      "completion_date": "2002-01",
      "has_results": false,
      "last_update_posted_date": "2008-03-04",
      "last_synced_at": "2026-07-23T22:22:39.363Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00006337"
    },
    {
      "nct_id": "NCT02153645",
      "title": "Efficacy and Safety of Amantadine Hydrochloride (HCl) ER Tablets to Treat Parkinson's Disease Patients With LID.",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Parkinson's Disease",
        "Levodopa Induced Dyskinesias (LID)"
      ],
      "interventions": [
        {
          "name": "240mg Amantadine HCl ER tablets",
          "type": "DRUG"
        },
        {
          "name": "Placebo tablets",
          "type": "DRUG"
        },
        {
          "name": "320mg Amantadine HCl ER tablets",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Adamas Pharmaceuticals, Inc.",
      "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": 87,
      "start_date": "2014-08-18",
      "completion_date": "2016-05-20",
      "has_results": true,
      "last_update_posted_date": "2022-02-16",
      "last_synced_at": "2026-07-23T22:22:39.363Z",
      "location_count": 26,
      "location_summary": "Tucson, Arizona • Fountain Valley, California • Irvine, California + 21 more",
      "locations": [
        {
          "city": "Tucson",
          "state": "Arizona"
        },
        {
          "city": "Fountain Valley",
          "state": "California"
        },
        {
          "city": "Irvine",
          "state": "California"
        },
        {
          "city": "Pasadena",
          "state": "California"
        },
        {
          "city": "Reseda",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02153645"
    },
    {
      "nct_id": "NCT02794233",
      "title": "Identification of Clinically Relevant Markers of Deep Brain Stimulation Electrode Impedance",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Parkinson Disease"
      ],
      "interventions": [
        {
          "name": "Impedance measurements",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "OTHER"
      ],
      "sponsor": "University of Florida",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "25 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "25 Years to 80 Years"
      },
      "enrollment_count": 6,
      "start_date": "2016-07",
      "completion_date": "2017-06",
      "has_results": false,
      "last_update_posted_date": "2018-05-15",
      "last_synced_at": "2026-07-23T22:22:39.363Z",
      "location_count": 1,
      "location_summary": "Gainesville, Florida",
      "locations": [
        {
          "city": "Gainesville",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02794233"
    },
    {
      "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": "2026-07-23T22:22:39.363Z",
      "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": "NCT00004847",
      "title": "Diagnosis of Pheochromocytoma",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Pheochromocytoma",
        "Endocrine Disease",
        "Endocrine Diseases"
      ],
      "interventions": [
        {
          "name": "([18F]-DOPA)",
          "type": "DRUG"
        },
        {
          "name": "([18F]-6F-DA)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "3 Years",
        "maximum_age": "120 Years",
        "sex": "ALL",
        "summary": "3 Years to 120 Years"
      },
      "enrollment_count": 3000,
      "start_date": "2000-03-22",
      "completion_date": "2048-11-30",
      "has_results": false,
      "last_update_posted_date": "2026-07-23",
      "last_synced_at": "2026-07-23T22:22:39.363Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00004847"
    },
    {
      "nct_id": "NCT02952014",
      "title": "Assessment of a Pre-Workout Dietary Supplement",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Dietary Modification"
      ],
      "interventions": [
        {
          "name": "C4 Extreme",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "C4 Extreme (without Advantra Z",
          "type": "DIETARY_SUPPLEMENT"
        },
        {
          "name": "Placebo",
          "type": "DIETARY_SUPPLEMENT"
        }
      ],
      "intervention_types": [
        "DIETARY_SUPPLEMENT"
      ],
      "sponsor": "Texas A&M University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "40 Years",
        "sex": "ALL",
        "summary": "18 Years to 40 Years"
      },
      "enrollment_count": 31,
      "start_date": "2014-02",
      "completion_date": "2014-05",
      "has_results": false,
      "last_update_posted_date": "2016-11-02",
      "last_synced_at": "2026-07-23T22:22:39.363Z",
      "location_count": 1,
      "location_summary": "College Station, Texas",
      "locations": [
        {
          "city": "College Station",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02952014"
    },
    {
      "nct_id": "NCT00601523",
      "title": "Long-term Safety Study of Open-label Pramipexole Extended Release (ER) in Patients With Early Parkinson´s Disease (PD).",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Parkinson Disease"
      ],
      "interventions": [
        {
          "name": "Placebo",
          "type": "DRUG"
        },
        {
          "name": "Pramipexole",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Boehringer Ingelheim",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "30 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "30 Years and older"
      },
      "enrollment_count": 511,
      "start_date": "2008-01",
      "completion_date": null,
      "has_results": true,
      "last_update_posted_date": "2014-06-09",
      "last_synced_at": "2026-07-23T22:22:39.363Z",
      "location_count": 10,
      "location_summary": "Sun City, Arizona • Tempe, Arizona • La Jolla, California + 7 more",
      "locations": [
        {
          "city": "Sun City",
          "state": "Arizona"
        },
        {
          "city": "Tempe",
          "state": "Arizona"
        },
        {
          "city": "La Jolla",
          "state": "California"
        },
        {
          "city": "Oxnard",
          "state": "California"
        },
        {
          "city": "Danbury",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00601523"
    },
    {
      "nct_id": "NCT02271503",
      "title": "A Study to Assess the PK and Pharmacodynamics of IPX203 in Patients With Advanced Parkinson's Disease",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Parkinson's Disease"
      ],
      "interventions": [
        {
          "name": "CD-LD IR",
          "type": "DRUG"
        },
        {
          "name": "IPX203 180 mg",
          "type": "DRUG"
        },
        {
          "name": "IPX203 270 mg",
          "type": "DRUG"
        },
        {
          "name": "Rytary 195 mg",
          "type": "DRUG"
        },
        {
          "name": "Rytary 145 mg",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Impax Laboratories, LLC",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "40 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "40 Years and older"
      },
      "enrollment_count": 26,
      "start_date": "2015-11",
      "completion_date": "2016-08",
      "has_results": false,
      "last_update_posted_date": "2019-11-06",
      "last_synced_at": "2026-07-23T22:22:39.363Z",
      "location_count": 11,
      "location_summary": "Phoenix, Arizona • Little Rock, Arkansas • Fountain Valley, California + 8 more",
      "locations": [
        {
          "city": "Phoenix",
          "state": "Arizona"
        },
        {
          "city": "Little Rock",
          "state": "Arkansas"
        },
        {
          "city": "Fountain Valley",
          "state": "California"
        },
        {
          "city": "Boca Raton",
          "state": "Florida"
        },
        {
          "city": "Naples",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02271503"
    }
  ]
}