{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Spasmodic+Dysphonia",
    "query": {
      "condition": "Spasmodic Dysphonia"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 36,
    "total_pages": 4,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Spasmodic+Dysphonia&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-05-22T03:07:47.658Z",
  "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": "NCT03746509",
      "title": "Laryngeal Vibration for Spasmodic Dysphonia",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Spasmodic Dysphonia"
      ],
      "interventions": [
        {
          "name": "Laryngeal Vibration (Treatment)",
          "type": "DEVICE"
        },
        {
          "name": "Laryngeal Vibration (Comparator)",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "University of Minnesota",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 42,
      "start_date": "2019-04-02",
      "completion_date": "2022-07-20",
      "has_results": true,
      "last_update_posted_date": "2025-05-04",
      "last_synced_at": "2026-05-22T03:07:47.658Z",
      "location_count": 1,
      "location_summary": "Minneapolis, Minnesota",
      "locations": [
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03746509"
    },
    {
      "nct_id": "NCT05467228",
      "title": "Laryngeal Vibro-tactile Stimulation as a Non-invasive Symptomatic Treatment for Spasmodic Dysphonia",
      "overall_status": "WITHDRAWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Adductor Spasmodic Dysphonia",
        "Abductor Spastic Dysphonia",
        "Laryngeal Dystonia"
      ],
      "interventions": [
        {
          "name": "vibro-tactile stimulation (VTS)",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "University of Minnesota",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 0,
      "start_date": "2026-08",
      "completion_date": "2026-08-01",
      "has_results": false,
      "last_update_posted_date": "2025-05-16",
      "last_synced_at": "2026-05-22T03:07:47.658Z",
      "location_count": 1,
      "location_summary": "Minneapolis, Minnesota",
      "locations": [
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05467228"
    },
    {
      "nct_id": "NCT05158166",
      "title": "DaxibotulinumtoxinA Injection for Treatment of Adductor Spasmodic Dysphonia",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Adductor Spasmodic Dysphonia",
        "Voice Disorders",
        "Spasmodic Dysphonia"
      ],
      "interventions": [
        {
          "name": "DaxibotulinumtoxinA",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "University of California, San Francisco",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 22,
      "start_date": "2023-10-13",
      "completion_date": "2025-03-02",
      "has_results": true,
      "last_update_posted_date": "2026-05-18",
      "last_synced_at": "2026-05-22T03:07:47.658Z",
      "location_count": 1,
      "location_summary": "San Francisco, California",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05158166"
    },
    {
      "nct_id": "NCT06078527",
      "title": "Assessment of Laryngopharyngeal Sensation: Cancer Survivor Cohort",
      "overall_status": "NOT_YET_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Presbylarynx",
        "Aspiration",
        "Spasmodic Dysphonia",
        "Globus Pharyngeus",
        "Larynx Paralysis",
        "Laryngeal Disease",
        "Vocal Cord Paralysis",
        "Iatrogenic Injury",
        "Sensory Neuropathy"
      ],
      "interventions": [
        {
          "name": "Cheung-Bearelly Aesthesiometer",
          "type": "DEVICE"
        },
        {
          "name": "Transnasal Laryngoscopy",
          "type": "PROCEDURE"
        },
        {
          "name": "Questionnaires",
          "type": "OTHER"
        }
      ],
      "intervention_types": [
        "DEVICE",
        "PROCEDURE",
        "OTHER"
      ],
      "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": 40,
      "start_date": "2025-10-01",
      "completion_date": "2028-01-31",
      "has_results": false,
      "last_update_posted_date": "2025-07-23",
      "last_synced_at": "2026-05-22T03:07:47.658Z",
      "location_count": 1,
      "location_summary": "San Francisco, California",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT06078527"
    },
    {
      "nct_id": "NCT00001922",
      "title": "Sensory Function in Idiopathic Voice Disorders",
      "overall_status": "COMPLETED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Phonation Disorder",
        "Spastic Dysphonia",
        "Voice Disorder"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "National Institute of Neurological Disorders and Stroke (NINDS)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "20 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "20 Years to 80 Years"
      },
      "enrollment_count": 370,
      "start_date": "1998-11-05",
      "completion_date": null,
      "has_results": false,
      "last_update_posted_date": "2017-07-02",
      "last_synced_at": "2026-05-22T03:07:47.658Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00001922"
    },
    {
      "nct_id": "NCT00895063",
      "title": "Effect of Vocal Exercise After Botulinum Toxin Injection for Spasmodic Dysphonia",
      "overall_status": "TERMINATED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Spasmodic Dysphonia",
        "Dystonia"
      ],
      "interventions": [
        {
          "name": "Vocal Exercise",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "NYU Langone Health",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 8,
      "start_date": "2007-12",
      "completion_date": "2013-05",
      "has_results": false,
      "last_update_posted_date": "2016-03-03",
      "last_synced_at": "2026-05-22T03:07:47.658Z",
      "location_count": 1,
      "location_summary": "New York, New York",
      "locations": [
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00895063"
    },
    {
      "nct_id": "NCT07443891",
      "title": "Brain Network Changes After Vibro-tactile Stimulation in Laryngeal Dystonia",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Laryngeal Dystonia"
      ],
      "interventions": [
        {
          "name": "Vibrotactile Stimulation (VTS)",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "University of Minnesota",
      "sponsor_class": "OTHER",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "75 Years",
        "sex": "ALL",
        "summary": "18 Years to 75 Years"
      },
      "enrollment_count": 20,
      "start_date": "2026-01-14",
      "completion_date": "2027-02-28",
      "has_results": false,
      "last_update_posted_date": "2026-03-19",
      "last_synced_at": "2026-05-22T03:07:47.658Z",
      "location_count": 1,
      "location_summary": "Minneapolis, Minnesota",
      "locations": [
        {
          "city": "Minneapolis",
          "state": "Minnesota"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07443891"
    },
    {
      "nct_id": "NCT00015795",
      "title": "Study of Air Stream in Voice Production",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Spastic Dysphonia",
        "Healthy"
      ],
      "interventions": [
        {
          "name": "airway interruption test",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "National Institute of Neurological Disorders and Stroke (NINDS)",
      "sponsor_class": "NIH",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": null,
        "maximum_age": null,
        "sex": "ALL",
        "summary": "Not listed"
      },
      "enrollment_count": 30,
      "start_date": "2001-05",
      "completion_date": "2003-06",
      "has_results": false,
      "last_update_posted_date": "2008-03-04",
      "last_synced_at": "2026-05-22T03:07:47.658Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00015795"
    },
    {
      "nct_id": "NCT00055549",
      "title": "Dextromethorphan to Treat Patients With Voice Spasms",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1"
      ],
      "conditions": [
        "Voice Disorders"
      ],
      "interventions": [
        {
          "name": "Dextromethorphan",
          "type": "DRUG"
        },
        {
          "name": "Lorazepam",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "National Institute of Neurological Disorders and Stroke (NINDS)",
      "sponsor_class": "NIH",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "80 Years",
        "sex": "ALL",
        "summary": "18 Years to 80 Years"
      },
      "enrollment_count": 65,
      "start_date": "2003-03-04",
      "completion_date": "2009-11-13",
      "has_results": false,
      "last_update_posted_date": "2017-07-02",
      "last_synced_at": "2026-05-22T03:07:47.658Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00055549"
    },
    {
      "nct_id": "NCT00001308",
      "title": "Central Mechanisms in Speech Motor Control Studied With H215O PET",
      "overall_status": "TERMINATED",
      "study_type": "OBSERVATIONAL",
      "phases": [],
      "conditions": [
        "Communication Disorder",
        "Healthy",
        "Stuttering",
        "Tourette Syndrome",
        "Voice Disorder"
      ],
      "interventions": [],
      "intervention_types": [],
      "sponsor": "National Institute on Deafness and Other Communication Disorders (NIDCD)",
      "sponsor_class": "NIH",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "85 Years",
        "sex": "ALL",
        "summary": "18 Years to 85 Years"
      },
      "enrollment_count": 1163,
      "start_date": "1992-04-28",
      "completion_date": "2016-10-06",
      "has_results": false,
      "last_update_posted_date": "2019-12-17",
      "last_synced_at": "2026-05-22T03:07:47.658Z",
      "location_count": 1,
      "location_summary": "Bethesda, Maryland",
      "locations": [
        {
          "city": "Bethesda",
          "state": "Maryland"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT00001308"
    }
  ]
}