{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=High+dose+levodopa",
    "query": {
      "intervention": "High dose levodopa"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 20,
    "total_pages": 2,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?intervention=High+dose+levodopa&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-09-25T01:31:47.661Z",
  "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": "NCT02240030",
      "title": "Efficacy and Safety Study of CVT-301 In Parkinson's Disease Patients With OFF Episodes",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Idiopathic Parkinson's Disease"
      ],
      "interventions": [
        {
          "name": "CVT-301 Low Dose",
          "type": "DRUG"
        },
        {
          "name": "CVT-301 High Dose",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "OTHER"
      ],
      "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": 351,
      "start_date": "2014-11",
      "completion_date": "2016-12",
      "has_results": true,
      "last_update_posted_date": "2019-05-28",
      "last_synced_at": "2026-09-25T01:31:47.661Z",
      "location_count": 55,
      "location_summary": "Scottsdale, Arizona • Fresno, California • Fullerton, California + 47 more",
      "locations": [
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Fresno",
          "state": "California"
        },
        {
          "city": "Fullerton",
          "state": "California"
        },
        {
          "city": "Loma Linda",
          "state": "California"
        },
        {
          "city": "Long Beach",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02240030"
    },
    {
      "nct_id": "NCT02242487",
      "title": "Twelve Month Safety and Efficacy Study of CVT-301 In Parkinson's Disease Patients With OFF Episodes",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Idiopathic Parkinson's Disease"
      ],
      "interventions": [
        {
          "name": "CVT-301",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Acorda Therapeutics",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "30 Years",
        "maximum_age": "86 Years",
        "sex": "ALL",
        "summary": "30 Years to 86 Years"
      },
      "enrollment_count": 325,
      "start_date": "2015-03",
      "completion_date": "2018-05",
      "has_results": true,
      "last_update_posted_date": "2019-08-14",
      "last_synced_at": "2026-09-25T01:31:47.661Z",
      "location_count": 55,
      "location_summary": "Scottsdale, Arizona • Fresno, California • Fullerton, California + 47 more",
      "locations": [
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Fresno",
          "state": "California"
        },
        {
          "city": "Fullerton",
          "state": "California"
        },
        {
          "city": "Loma Linda",
          "state": "California"
        },
        {
          "city": "Long Beach",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02242487"
    },
    {
      "nct_id": "NCT01399905",
      "title": "High and Low Dose Carbidopa Treatment of Parkinson's Disease",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Parkinson's Disease"
      ],
      "interventions": [
        {
          "name": "carbidopa",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Oregon Health and Science University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "35 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "35 Years to 85 Years"
      },
      "enrollment_count": 14,
      "start_date": "2009-03",
      "completion_date": "2011-05",
      "has_results": true,
      "last_update_posted_date": "2020-01-09",
      "last_synced_at": "2026-09-25T01:31:47.661Z",
      "location_count": 1,
      "location_summary": "Portland, Oregon",
      "locations": [
        {
          "city": "Portland",
          "state": "Oregon"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01399905"
    },
    {
      "nct_id": "NCT01951105",
      "title": "Effect of L-dopa In Subacute Back Pain Population",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Sub-acute Back Pain"
      ],
      "interventions": [
        {
          "name": "Naproxen",
          "type": "DRUG"
        },
        {
          "name": "Carbidopa/Levodopa",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Northwestern University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 72,
      "start_date": "2015-02-24",
      "completion_date": "2017-09-25",
      "has_results": true,
      "last_update_posted_date": "2021-03-24",
      "last_synced_at": "2026-09-25T01:31:47.661Z",
      "location_count": 1,
      "location_summary": "Chicago, Illinois",
      "locations": [
        {
          "city": "Chicago",
          "state": "Illinois"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01951105"
    },
    {
      "nct_id": "NCT03781167",
      "title": "A Study to Evaluate the Safety and Tolerability of ABBV-951 in Subjects With Parkinson's Disease (PD)",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE3"
      ],
      "conditions": [
        "Parkinson's Disease (PD)"
      ],
      "interventions": [
        {
          "name": "ABBV-951",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "AbbVie",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "30 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "30 Years and older"
      },
      "enrollment_count": 244,
      "start_date": "2019-04-29",
      "completion_date": "2022-08-17",
      "has_results": true,
      "last_update_posted_date": "2023-10-23",
      "last_synced_at": "2026-09-25T01:31:47.661Z",
      "location_count": 24,
      "location_summary": "Birmingham, Alabama • Sun City, Arizona • Fountain Valley, California + 21 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Sun City",
          "state": "Arizona"
        },
        {
          "city": "Fountain Valley",
          "state": "California"
        },
        {
          "city": "Aurora",
          "state": "Colorado"
        },
        {
          "city": "Boca Raton",
          "state": "Florida"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03781167"
    },
    {
      "nct_id": "NCT07793461",
      "title": "Gastrointestinal Dopamine Decarboxylase and Levodopa Pharmacokinetics",
      "overall_status": "NOT_YET_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Parkinson's Disease"
      ],
      "interventions": [
        {
          "name": "Levodopa (L-dopa)",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Beth Israel Deaconess Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 40,
      "start_date": "2027-07",
      "completion_date": "2030-12",
      "has_results": false,
      "last_update_posted_date": "2026-08-28",
      "last_synced_at": "2026-09-25T01:31:47.661Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07793461"
    },
    {
      "nct_id": "NCT02706977",
      "title": "The Effect of Dopamine on Diabetic Retinopathy",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Diabetes"
      ],
      "interventions": [
        {
          "name": "Low Dose Sinemet CR",
          "type": "DRUG"
        },
        {
          "name": "High Dose Sinemet CR",
          "type": "DRUG"
        },
        {
          "name": "RETeval Electroretinogram (ERG) Testing",
          "type": "DEVICE"
        },
        {
          "name": "Contrast Sensitivity Testing",
          "type": "OTHER"
        },
        {
          "name": "Visual Acuity Testing",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DEVICE",
        "OTHER"
      ],
      "sponsor": "Emory University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 60,
      "start_date": "2016-01",
      "completion_date": "2019-08-15",
      "has_results": false,
      "last_update_posted_date": "2019-10-09",
      "last_synced_at": "2026-09-25T01:31:47.661Z",
      "location_count": 1,
      "location_summary": "Atlanta, Georgia",
      "locations": [
        {
          "city": "Atlanta",
          "state": "Georgia"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02706977"
    },
    {
      "nct_id": "NCT03761030",
      "title": "L-DOPA vs. Placebo for Depression and Psychomotor Slowing in Older Adults",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE4"
      ],
      "conditions": [
        "Major Depressive Disorder",
        "Dysthymia",
        "Depression"
      ],
      "interventions": [
        {
          "name": "L-DOPA",
          "type": "DRUG"
        },
        {
          "name": "Placebo Oral Tablet",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "New York State Psychiatric Institute",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "60 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "60 Years and older"
      },
      "enrollment_count": 51,
      "start_date": "2019-01-09",
      "completion_date": "2021-09-08",
      "has_results": true,
      "last_update_posted_date": "2023-05-22",
      "last_synced_at": "2026-09-25T01:31:47.661Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03761030"
    },
    {
      "nct_id": "NCT01474421",
      "title": "Safety and Efficacy of AQW051 in L-dopa Induced Dyskinesias in Patients With Parkinson's Disease",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Dyskinesias",
        "Drug-induced"
      ],
      "interventions": [
        {
          "name": "AQW051",
          "type": "DRUG"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Novartis Pharmaceuticals",
      "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": 71,
      "start_date": "2011-09-15",
      "completion_date": "2013-02-21",
      "has_results": false,
      "last_update_posted_date": "2020-12-24",
      "last_synced_at": "2026-09-25T01:31:47.661Z",
      "location_count": 4,
      "location_summary": "Sacramento, California • Manhasset, New York • Cincinnati, Ohio + 1 more",
      "locations": [
        {
          "city": "Sacramento",
          "state": "California"
        },
        {
          "city": "Manhasset",
          "state": "New York"
        },
        {
          "city": "Cincinnati",
          "state": "Ohio"
        },
        {
          "city": "Cleveland",
          "state": "Ohio"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01474421"
    },
    {
      "nct_id": "NCT00001849",
      "title": "New Imaging Techniques in the Evaluation of Patients With Ectopic Cushing Syndrome",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Cushing Syndrome",
        "Endocrine Disease"
      ],
      "interventions": [
        {
          "name": "Pentetreotide",
          "type": "DRUG"
        },
        {
          "name": "18F-DOPA",
          "type": "DRUG"
        },
        {
          "name": "CT scan",
          "type": "DEVICE"
        },
        {
          "name": "MRI",
          "type": "DEVICE"
        },
        {
          "name": "18-FDG",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG",
        "DEVICE"
      ],
      "sponsor": "Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "90 Years",
        "sex": "ALL",
        "summary": "18 Years to 90 Years"
      },
      "enrollment_count": 95,
      "start_date": "1999-05-20",
      "completion_date": "2019-04-26",
      "has_results": true,
      "last_update_posted_date": "2021-04-14",
      "last_synced_at": "2026-09-25T01:31:47.661Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00001849"
    }
  ]
}