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ClinicalTrials.gov public records Last synced May 22, 2026, 2:47 AM EDT

Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.

Showing 25–36 of 12 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Filters: Condition: Spastic Dysphonia Clear all
Active, not recruiting Phase 1Phase 2 Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Spasmodic Dysphonia
Interventions
Zinc gluconate supplement, Botulinum toxin type A
Drug
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 99 Years
Enrollment
36 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2025
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Feb 24, 2025 · Synced May 22, 2026, 2:47 AM EDT
Not listed Phase 4 Interventional
View directory record Official record
Conditions
Dysphonia, Spastic, Dysphonia, Laryngeal Dystonia
Interventions
Pyridostigmine Bromide 60 Milligrams (mg)
Drug
Lead sponsor
Eastern Virginia Medical School
Other
Eligibility
21 Years to 100 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Norfolk, Virginia
Source: ClinicalTrials.gov public record
Updated Jul 26, 2022 · Synced May 22, 2026, 2:47 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available
View directory record Official record
Conditions
Spasmodic Dysphonia, Laryngeal Dystonia
Interventions
1Hz repetitive transcranial magnetic stimulation (rTMS)
Device
Lead sponsor
University of Minnesota
Other
Eligibility
21 Years to 75 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Sep 30, 2020 · Synced May 22, 2026, 2:47 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Laryngeal Dystonia
Interventions
neurofeedback brain-computer interface (BCI)
Device
Lead sponsor
Kristina Simonyan
Other
Eligibility
18 Years to 80 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 1, 2025 · Synced May 22, 2026, 2:47 AM EDT
Recruiting No phase listed Observational
View directory record Official record
Conditions
Laryngeal Dystonia, Adductor Spastic Dysphonia of Dystonia
Interventions
Deep Brain Stimulation
Device
Lead sponsor
Indiana University
Other
Eligibility
18 Years to 70 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2030
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Jul 16, 2025 · Synced May 22, 2026, 2:47 AM EDT
Completed No phase listed Observational
View directory record Official record
Conditions
Voice Disorders, Spasmodic Dysphonia, Healthy, Movement Disorder, Focal Dystonia
Interventions
Not listed
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
21 Years and older
Enrollment
97 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2022
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Aug 7, 2022 · Synced May 22, 2026, 2:47 AM EDT
Completed Not applicable Interventional
View directory record Official record
Conditions
Adductor Spasmodic Dysphonia
Interventions
Voice Exercise
Behavioral
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
21 Years to 70 Years · Female only
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
1
States / cities
Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated May 22, 2019 · Synced May 22, 2026, 2:47 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers
View directory record Official record
Conditions
Laryngeal Dystonia, Spasmodic Dysphonia, Tremor
Interventions
Clinical assessments of laryngeal function
Other
Lead sponsor
Massachusetts Eye and Ear Infirmary
Other
Eligibility
18 Years to 80 Years
Enrollment
165 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 1, 2025 · Synced May 22, 2026, 2:47 AM EDT
Completed Phase 2Phase 3 Interventional Results available
View directory record Official record
Conditions
Spasmodic Dysphonia, Voice Tremor
Interventions
Sodium Oxybate
Drug
Lead sponsor
Kristina Simonyan
Other
Eligibility
21 Years to 80 Years
Enrollment
117 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2024
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 29, 2025 · Synced May 22, 2026, 2:47 AM EDT
Completed No phase listed Observational Accepts healthy volunteers
View directory record Official record
Conditions
Laryngeal Disease, Spastic Dysphonia, Voice Disorder
Interventions
Not listed
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
Not listed
Enrollment
270 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 1996
U.S. locations
2
States / cities
Iowa City, Iowa • Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced May 22, 2026, 2:47 AM EDT
Completed Phase 2Phase 3 Interventional Results available
View directory record Official record
Conditions
Spasmodic Dysphonia
Interventions
Lidocaine, Vibrating wand
Drug · Device
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated May 22, 2024 · Synced May 22, 2026, 2:47 AM EDT
Completed Phase 2 Interventional
View directory record Official record
Conditions
Vocal Weakness(Post-BOTOX Injection)
Interventions
Amifampridine
Drug
Lead sponsor
Augusta University
Other
Eligibility
18 Years and older
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2025
U.S. locations
1
States / cities
Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated Oct 2, 2025 · Synced May 22, 2026, 2:47 AM EDT