{
  "api_version": "1",
  "request": {
    "url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Voice+Change",
    "query": {
      "condition": "Voice Change"
    },
    "page_size": 10
  },
  "pagination": {
    "page": 1,
    "page_size": 10,
    "total_count": 84,
    "total_pages": 9,
    "next_page_url": "https://clinicaltrialsfind.com/api/v1/search.json?condition=Voice+Change&page=2&page_size=10",
    "previous_page_url": null
  },
  "source": "remote",
  "last_synced_at": "2026-07-22T14:04:17.168Z",
  "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": "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": "2026-07-22T14:04:17.168Z",
      "location_count": 1,
      "location_summary": "San Francisco, California",
      "locations": [
        {
          "city": "San Francisco",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05158166"
    },
    {
      "nct_id": "NCT03129880",
      "title": "Intensive Versus Traditional Voice Therapy",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Dysphonia"
      ],
      "interventions": [
        {
          "name": "Weekly Voice Therapy",
          "type": "BEHAVIORAL"
        },
        {
          "name": "Intensive Voice Therapy",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "BEHAVIORAL"
      ],
      "sponsor": "University of Wisconsin, Madison",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 15,
      "start_date": "2016-03-13",
      "completion_date": "2024-03-12",
      "has_results": false,
      "last_update_posted_date": "2024-05-16",
      "last_synced_at": "2026-07-22T14:04:17.168Z",
      "location_count": 1,
      "location_summary": "Madison, Wisconsin",
      "locations": [
        {
          "city": "Madison",
          "state": "Wisconsin"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03129880"
    },
    {
      "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": "2026-07-22T14:04:17.168Z",
      "location_count": 1,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05095740"
    },
    {
      "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": "2026-07-22T14:04:17.168Z",
      "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": "NCT03410797",
      "title": "Efficacy of a Semi-occluded Mask in the Treatment of Patients With Voice Disorders",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Voice and Resonance Disorders",
        "Vocal Fold Polyp",
        "Vocal Cord Cyst",
        "Vocal Cord Polyp",
        "Atrophy of Vocal Cord"
      ],
      "interventions": [
        {
          "name": "Inclusion of semi-occluded mask in voice therapy",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Jacqueline Gartner-Schmidt",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": "60 Years",
        "sex": "ALL",
        "summary": "18 Years to 60 Years"
      },
      "enrollment_count": 11,
      "start_date": "2018-06-19",
      "completion_date": "2019-12-30",
      "has_results": true,
      "last_update_posted_date": "2021-01-05",
      "last_synced_at": "2026-07-22T14:04:17.168Z",
      "location_count": 1,
      "location_summary": "Pittsburgh, Pennsylvania",
      "locations": [
        {
          "city": "Pittsburgh",
          "state": "Pennsylvania"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03410797"
    },
    {
      "nct_id": "NCT07599826",
      "title": "Active vs. Passive VR During Office-based ENT Procedures",
      "overall_status": "NOT_YET_RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Pain",
        "Anxiety",
        "Chronic Rhinosinusitis (CRS)",
        "Nasal Obstruction",
        "Nasal Polyp",
        "Eustachian Tube Dysfunction",
        "Dysphonia",
        "Subglottic Stenosis (SGS)"
      ],
      "interventions": [
        {
          "name": "Virtual reality headset or goggles",
          "type": "DEVICE"
        }
      ],
      "intervention_types": [
        "DEVICE"
      ],
      "sponsor": "Cedars-Sinai Medical Center",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 132,
      "start_date": "2026-06",
      "completion_date": "2027-12",
      "has_results": false,
      "last_update_posted_date": "2026-05-20",
      "last_synced_at": "2026-07-22T14:04:17.168Z",
      "location_count": 1,
      "location_summary": "Los Angeles, California",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT07599826"
    },
    {
      "nct_id": "NCT02120781",
      "title": "Controlled Study to Evaluate the Safety and Efficacy of Azficel-T for Vocal Fold Scarring and Age-Related Dysphonia",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE2"
      ],
      "conditions": [
        "Dysphonia Resulting From Vocal Fold Scarring",
        "Age-related Dysphonia"
      ],
      "interventions": [
        {
          "name": "Azficel-T (autologous fibroblasts)",
          "type": "BIOLOGICAL"
        },
        {
          "name": "Placebo",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "BIOLOGICAL",
        "DRUG"
      ],
      "sponsor": "Castle Creek Biosciences, LLC.",
      "sponsor_class": "INDUSTRY",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 21,
      "start_date": "2014-03",
      "completion_date": "2016-12-21",
      "has_results": true,
      "last_update_posted_date": "2021-06-03",
      "last_synced_at": "2026-07-22T14:04:17.168Z",
      "location_count": 3,
      "location_summary": "Los Angeles, California • Stanford, California • New York, New York",
      "locations": [
        {
          "city": "Los Angeles",
          "state": "California"
        },
        {
          "city": "Stanford",
          "state": "California"
        },
        {
          "city": "New York",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT02120781"
    },
    {
      "nct_id": "NCT03720301",
      "title": "The Use of Osteopathic Medical Manipulation to Decrease the Incidence and Severity of Post-Operative Sore Throat",
      "overall_status": "UNKNOWN",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "NA"
      ],
      "conditions": [
        "Pharyngitis",
        "Dysphonia"
      ],
      "interventions": [
        {
          "name": "Osteopathic Manipulation Treatment",
          "type": "PROCEDURE"
        },
        {
          "name": "Sham",
          "type": "PROCEDURE"
        }
      ],
      "intervention_types": [
        "PROCEDURE"
      ],
      "sponsor": "Brooke Army Medical Center",
      "sponsor_class": "FED",
      "healthy_volunteers": true,
      "eligibility": {
        "minimum_age": "18 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "18 Years and older"
      },
      "enrollment_count": 168,
      "start_date": "2018-10-17",
      "completion_date": "2020-06-30",
      "has_results": false,
      "last_update_posted_date": "2018-10-25",
      "last_synced_at": "2026-07-22T14:04:17.168Z",
      "location_count": 1,
      "location_summary": "San Antonio, Texas",
      "locations": [
        {
          "city": "San Antonio",
          "state": "Texas"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT03720301"
    },
    {
      "nct_id": "NCT01864525",
      "title": "Effects of Octanoic Acid for Treatment of Essential Voice Tremor",
      "overall_status": "COMPLETED",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "PHASE1",
        "PHASE2"
      ],
      "conditions": [
        "Essential Voice Tremor",
        "Vocal Tremor",
        "Voice Tremor",
        "Essential Tremor of Voice"
      ],
      "interventions": [
        {
          "name": "Octanoic acid",
          "type": "DRUG"
        },
        {
          "name": "Inactive capsule",
          "type": "DRUG"
        }
      ],
      "intervention_types": [
        "DRUG"
      ],
      "sponsor": "Syracuse University",
      "sponsor_class": "OTHER",
      "healthy_volunteers": false,
      "eligibility": {
        "minimum_age": "21 Years",
        "maximum_age": null,
        "sex": "ALL",
        "summary": "21 Years and older"
      },
      "enrollment_count": 17,
      "start_date": "2013-07",
      "completion_date": "2017-03-31",
      "has_results": true,
      "last_update_posted_date": "2018-08-20",
      "last_synced_at": "2026-07-22T14:04:17.168Z",
      "location_count": 1,
      "location_summary": "Syracuse, New York",
      "locations": [
        {
          "city": "Syracuse",
          "state": "New York"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT01864525"
    },
    {
      "nct_id": "NCT05970562",
      "title": "Project 4: Ambulatory Biofeedback and Voice Therapy for Patients With Vocal Hyperfunction",
      "overall_status": "RECRUITING",
      "study_type": "INTERVENTIONAL",
      "phases": [
        "EARLY_PHASE1"
      ],
      "conditions": [
        "Voice Disorders",
        "Vocal Fold Polyp",
        "Vocal Nodules in Adults",
        "Muscle Tension Dysphonia"
      ],
      "interventions": [
        {
          "name": "Ambulatory Voice Monitoring with Biofeedback (AVM-B)",
          "type": "DEVICE"
        },
        {
          "name": "Conversation Training Therapy",
          "type": "BEHAVIORAL"
        }
      ],
      "intervention_types": [
        "DEVICE",
        "BEHAVIORAL"
      ],
      "sponsor": "Massachusetts General Hospital",
      "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": 100,
      "start_date": "2024-03-01",
      "completion_date": "2029-04-01",
      "has_results": false,
      "last_update_posted_date": "2026-07-16",
      "last_synced_at": "2026-07-22T14:04:17.168Z",
      "location_count": 2,
      "location_summary": "Boston, Massachusetts",
      "locations": [
        {
          "city": "Boston",
          "state": "Massachusetts"
        },
        {
          "city": "Boston",
          "state": "Massachusetts"
        }
      ],
      "official_url": "https://clinicaltrials.gov/study/NCT05970562"
    }
  ]
}