{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Spasmodic+Dysphonia&page=2",
    "query": {
      "condition": "Spasmodic Dysphonia",
      "page": 2
    },
    "page_size": 10
  },
  "pagination": {
    "page": 2,
    "page_size": 10,
    "total_count": 10,
    "total_pages": 1,
    "next_page_url": null,
    "previous_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Spasmodic+Dysphonia&page=1&page_size=10"
  },
  "source": "remote",
  "last_synced_at": "2026-05-22T09:48:03.413Z",
  "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": "NCT05216770",
      "title": "Understanding Disorder-specific Neural Pathophysiology in Laryngeal Dystonia and Voice Tremor",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Laryngeal Dystonia",
        "Spasmodic Dysphonia",
        "Tremor"
      ],
      "interventions": [
        {
          "name": "Brain imaging",
          "type": "OTHER"
        },
        {
          "name": "Laryngeal sensory block with topical bupivacaine",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "OTHER",
        "DRUG"
      ],
      "sponsor": "Massachusetts Eye and Ear Infirmary",
      "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": 165,
      "start_date": "2022-03-24",
      "completion_date": "2027-08-31",
      "has_results": false,
      "last_update_posted_date": "2025-12-02",
      "last_synced_at": "2026-05-22T09:48:03.413Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05216770"
    },
    {
      "nct_id": "NCT01961297",
      "title": "Voice Tremor in Spasmodic Dysphonia: Central Mechanisms and Treatment Response",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Spasmodic Dysphonia",
        "Voice Tremor"
      ],
      "interventions": [
        {
          "name": "Sodium oxybate",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Kristina Simonyan",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "21 Years to 80 Years"
      },
      "enrollment_count": 53,
      "start_date": "2012-07",
      "completion_date": "2017-06-30",
      "has_results": true,
      "last_update_posted_date": "2017-11-22",
      "last_synced_at": "2026-05-22T09:48:03.413Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01961297"
    },
    {
      "nct_id": "NCT06111027",
      "title": "Usability of Vibro-tactile Stimulation to Treat Spasmodic Dysphonia",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Spasmodic Dysphonia",
        "Laryngeal Dystonia"
      ],
      "interventions": [
        {
          "name": "Vibro-tactile stimulation",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "University of Minnesota",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 40,
      "start_date": "2023-09-20",
      "completion_date": "2024-10-31",
      "has_results": false,
      "last_update_posted_date": "2024-12-20",
      "last_synced_at": "2026-05-22T09:48:03.413Z",
      "location_count": 1,
      "location_summary": "Minneapolis, Minnesota",
      "locations": [
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06111027"
    },
    {
      "nct_id": "NCT02061943",
      "title": "Examining the Spasmodic Dysphonia Diagnosis and Assessment Procedure (SD-DAP) for Measuring Symptom Change",
      "overall_status": "WITHDRAWN",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Spasmodic Dysphonia",
        "Laryngeal Dystonia"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Emory University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "18 Years to 85 Years"
      },
      "enrollment_count": 0,
      "start_date": "2015-10",
      "completion_date": "2016-04",
      "has_results": false,
      "last_update_posted_date": "2016-05-30",
      "last_synced_at": "2026-05-22T09:48:03.413Z",
      "location_count": 2,
      "location_summary": "Atlanta, Georgia • St Louis, Missouri",
      "locations": [
        {
          "city": "Atlanta",
          "state": "Georgia"
        },
        {
          "city": "St Louis",
          "state": "Missouri"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02061943"
    },
    {
      "nct_id": "NCT00713414",
      "title": "Role of Neurotransmission and Functional CNS Networks in Spasmodic Dysphonia",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Spasmodic Dysphonia",
        "Focal Dystonia"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "National Institute of Neurological Disorders and Stroke (NINDS)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "21 Years to 80 Years"
      },
      "enrollment_count": 37,
      "start_date": "2008-07-09",
      "completion_date": "2016-09-21",
      "has_results": false,
      "last_update_posted_date": "2018-07-05",
      "last_synced_at": "2026-05-22T09:48:03.413Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00713414"
    },
    {
      "nct_id": "NCT06830174",
      "title": "tDCS for Laryngeal Dystonia",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Laryngeal Dystonia"
      ],
      "interventions": [
        {
          "name": "Starstim system",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Yale University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "65 Years",
        "sex": "ALL",
        "summary": "18 Years to 65 Years"
      },
      "enrollment_count": 10,
      "start_date": "2025-04-14",
      "completion_date": "2026-12",
      "has_results": false,
      "last_update_posted_date": "2026-02-09",
      "last_synced_at": "2026-05-22T09:48:03.413Z",
      "location_count": 1,
      "location_summary": "New Haven, Connecticut",
      "locations": [
        {
          "city": "New Haven",
          "state": "Connecticut"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06830174"
    },
    {
      "nct_id": "NCT05158179",
      "title": "Assessment of Laryngopharyngeal Sensation in Adductor Spasmodic Dysphonia",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Spasmodic Dysphonia",
        "Adductor Spasmodic Dysphonia",
        "Voice Disorders"
      ],
      "interventions": [
        {
          "name": "Sensation testing",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "University of California, San Francisco",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "18 Years to 85 Years"
      },
      "enrollment_count": 13,
      "start_date": "2021-08-27",
      "completion_date": "2022-04-29",
      "has_results": true,
      "last_update_posted_date": "2024-01-11",
      "last_synced_at": "2026-05-22T09:48:03.413Z",
      "location_count": 1,
      "location_summary": "San Francisco, California",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05158179"
    },
    {
      "nct_id": "NCT05095740",
      "title": "Effects of Neuromodulation in Laryngeal Dystonia",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Laryngeal Dystonia",
        "Focal Dystonia"
      ],
      "interventions": [
        {
          "name": "repetitive transcranial magnetic stimulation (rTMS)",
          "type": "DEVICE"
        },
        {
          "name": "sham rTMS",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "MGH Institute of Health Professions",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "21 Years to 85 Years"
      },
      "enrollment_count": 25,
      "start_date": "2021-06-10",
      "completion_date": "2026-12-31",
      "has_results": false,
      "last_update_posted_date": "2026-02-20",
      "last_synced_at": "2026-05-22T09:48:03.413Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05095740"
    },
    {
      "nct_id": "NCT07041203",
      "title": "Extended-release Sodium Oxybate (Lumryz) in Spasmodic Dysphonia and Voice Tremor",
      "overall_status": "NOT_YET_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Spasmodic Dysphonia",
        "Laryngeal Dystonia",
        "Voice Tremor"
      ],
      "interventions": [
        {
          "name": "sodium oxybate",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Kristina Simonyan",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "21 Years to 80 Years"
      },
      "enrollment_count": 8,
      "start_date": "2026-10-01",
      "completion_date": "2027-09-30",
      "has_results": false,
      "last_update_posted_date": "2026-04-28",
      "last_synced_at": "2026-05-22T09:48:03.413Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07041203"
    },
    {
      "nct_id": "NCT01373424",
      "title": "The Dystonia Coalition Natural History and Biospecimen Repository for Isolated Dystonias",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Dystonia"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "Emory University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 3265,
      "start_date": "2011-01",
      "completion_date": "2020-09-30",
      "has_results": false,
      "last_update_posted_date": "2020-10-26",
      "last_synced_at": "2026-05-22T09:48:03.413Z",
      "location_count": 34,
      "location_summary": "Birmingham, Alabama • Scottsdale, Arizona • Fountain Valley, California + 26 more",
      "locations": [
        {
          "city": "Birmingham",
          "state": "Alabama"
        },
        {
          "city": "Scottsdale",
          "state": "Arizona"
        },
        {
          "city": "Fountain Valley",
          "state": "California"
        },
        {
          "city": "La Jolla",
          "state": "California"
        },
        {
          "city": "Denver",
          "state": "Colorado"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01373424"
    }
  ]
}