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ClinicalTrials.gov public records Last synced May 22, 2026, 1:40 AM EDT

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

Showing 1–24 of 33 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Filters: Condition: Stutter Clear all
Not yet recruiting Phase 2 Interventional
View directory record Official record
Conditions
Stuttering
Interventions
Psilocybin, Speech therapy
Drug · Behavioral
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 50 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Dec 21, 2025 · Synced May 22, 2026, 1:40 AM EDT
Withdrawn Phase 1 Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Stuttering
Interventions
Tactile Stimulation
Device
Lead sponsor
University of Mississippi, Oxford
Other
Eligibility
18 Years and older
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2011
U.S. locations
1
States / cities
University, Mississippi
Source: ClinicalTrials.gov public record
Updated May 11, 2014 · Synced May 22, 2026, 1:40 AM EDT
Active, not recruiting Not applicable Interventional
View directory record Official record
Conditions
Stuttering, Adult
Interventions
Altered Auditory Feedback
Device
Lead sponsor
Massachusetts Institute of Technology
Other
Eligibility
18 Years to 100 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
Cambridge, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 13, 2026 · Synced May 22, 2026, 1:40 AM EDT
Terminated Not applicable Interventional Results available
View directory record Official record
Conditions
Stuttering, Developmental
Interventions
Anodal tDCS, Fluency training, Sham tDCS
Device · Behavioral
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 65 Years
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Apr 28, 2021 · Synced May 22, 2026, 1:40 AM EDT
Recruiting Not applicable Interventional
View directory record Official record
Conditions
Stutter, Stuttering, Adult, Stuttering, Stuttering, Developmental
Interventions
Speech Production During functional magnetic resonance imaging (MRI)
Behavioral
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 65 Years
Enrollment
50 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Apr 28, 2026 · Synced May 22, 2026, 1:40 AM EDT
Terminated No phase listed Observational Accepts healthy volunteers
View directory record Official record
Conditions
Communication Disorder, Healthy, Stuttering, Tourette Syndrome, Voice Disorder
Interventions
Not listed
Lead sponsor
National Institute on Deafness and Other Communication Disorders (NIDCD)
NIH
Eligibility
18 Years to 85 Years
Enrollment
1,163 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1992 – 2016
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Dec 16, 2019 · Synced May 22, 2026, 1:40 AM EDT
Completed Phase 2Phase 3 Interventional
View directory record Official record
Conditions
Stuttering
Interventions
pagoclone, placebo
Drug · Other
Lead sponsor
Endo Pharmaceuticals
Industry
Eligibility
18 Years to 80 Years
Enrollment
321 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Aug 27, 2012 · Synced May 22, 2026, 1:40 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Stuttering, Developmental, Aphasia, Primary Progressive
Interventions
Learning of non-native phoneme combinations: 6 training sessions, Learning of non-native phoneme combinations: 1 training session, Learning of novel multisyllabic nonwords, Anodal tDCS, Sham tDCS, Learning of non-native phoneme combinations: 8 training sessions
Behavioral · Device
Lead sponsor
Boston University Charles River Campus
Other
Eligibility
6 Years and older
Enrollment
2 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
3
States / cities
Boston, Massachusetts • Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated May 3, 2026 · Synced May 22, 2026, 1:40 AM EDT
Recruiting Not applicable Interventional
View directory record Official record
Conditions
Stuttering, Adult, Stuttering, Childhood, Stuttering, Developmental
Interventions
transcranial alternating current stimulation (tACS)
Device
Lead sponsor
University of Michigan
Other
Eligibility
18 Years to 65 Years
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2029
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Sep 11, 2025 · Synced May 22, 2026, 1:40 AM EDT
Completed No phase listed Observational Accepts healthy volunteers
View directory record Official record
Conditions
Developmental Articulation Disorder, Stuttering
Interventions
Not listed
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
6 Years to 65 Years
Enrollment
411 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2000
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced May 22, 2026, 1:40 AM EDT
Completed Phase 2 Interventional
View directory record Official record
Conditions
Persistent Developmental Stuttering
Interventions
Pagoclone
Drug
Lead sponsor
Pharmacology Research Institute
Other
Eligibility
18 Years to 65 Years
Timeline
2005 – 2006
U.S. locations
1
States / cities
Riverside, California
Source: ClinicalTrials.gov public record
Updated May 8, 2012 · Synced May 22, 2026, 1:40 AM EDT
Suspended Phase 3 Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Stuttering
Interventions
Asenapine
Drug
Lead sponsor
University of California, Irvine
Other
Eligibility
18 Years to 70 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
1
States / cities
Orange, California
Source: ClinicalTrials.gov public record
Updated May 19, 2014 · Synced May 22, 2026, 1:40 AM EDT
Completed Phase 2 Interventional
View directory record Official record
Conditions
Childhood-Onset Fluency Disorder (Stuttering)
Interventions
Ecopipam, Placebo
Drug
Lead sponsor
Emalex Biosciences Inc.
Industry
Eligibility
18 Years and older
Enrollment
68 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
9
States / cities
Riverside, California • Santa Ana, California • Jacksonville, Florida + 6 more
Source: ClinicalTrials.gov public record
Updated Apr 27, 2022 · Synced May 22, 2026, 1:40 AM EDT
Completed No phase listed Observational
View directory record Official record
Conditions
Stuttering
Interventions
Not listed
Lead sponsor
National Institute on Deafness and Other Communication Disorders (NIDCD)
NIH
Eligibility
Not listed
Enrollment
500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1996 – 2005
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced May 22, 2026, 1:40 AM EDT
Recruiting Not applicable Interventional
View directory record Official record
Conditions
Parkinson's Disease (PD), Essential Tremor
Interventions
Phoneme sequence learning, Cessation and re-enabling of stimulation of the STN, Cessation and re-enabling of stimulation of the VIM thalamic nucleus, Multisyllabic sequence learning
Behavioral · Other
Lead sponsor
Boston University Charles River Campus
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
2
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 8, 2026 · Synced May 22, 2026, 1:40 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Stuttering, Adult
Interventions
Threat-related stimulus exposure
Behavioral
Lead sponsor
University of Memphis
Other
Eligibility
18 Years to 65 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Memphis, Tennessee
Source: ClinicalTrials.gov public record
Updated May 20, 2024 · Synced May 22, 2026, 1:40 AM EDT
Completed No phase listed Observational
View directory record Official record
Conditions
Developmental Stuttering
Interventions
Not listed
Lead sponsor
National Institute on Deafness and Other Communication Disorders (NIDCD)
NIH
Eligibility
18 Years to 55 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2010
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced May 22, 2026, 1:40 AM EDT
Recruiting Phase 1 Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Stuttering, Adult
Interventions
Aripiprazole 10 MG, Placebo
Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years to 65 Years
Enrollment
40 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2026
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Oct 13, 2025 · Synced May 22, 2026, 1:40 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Stuttering, Stuttering, Childhood, Stuttering, Adult
Interventions
Speech and non-speech tasks
Behavioral
Lead sponsor
University of Michigan
Other
Eligibility
6 Years to 65 Years
Enrollment
143 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
2
States / cities
Ann Arbor, Michigan • East Lansing, Michigan
Source: ClinicalTrials.gov public record
Updated Jul 2, 2025 · Synced May 22, 2026, 1:40 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Stuttering, Childhood, Stuttering
Interventions
Rhythm discrimination
Behavioral
Lead sponsor
University of Michigan
Other
Eligibility
9 Years to 13 Years
Enrollment
500 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Oct 22, 2025 · Synced May 22, 2026, 1:40 AM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Stuttering, Childhood
Interventions
Speech sound stimulation
Behavioral
Lead sponsor
University of Pittsburgh
Other
Eligibility
5 Years to 17 Years
Enrollment
600 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
2
States / cities
Ann Arbor, Michigan • Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 14, 2025 · Synced May 22, 2026, 1:40 AM EDT
Completed Phase 2 Interventional
View directory record Official record
Conditions
Persistent Developmental Stuttering
Interventions
Pagoclone, Placebo
Drug
Lead sponsor
Endo Pharmaceuticals
Industry
Eligibility
18 Years to 65 Years
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2011
U.S. locations
16
States / cities
Peoria, Arizona • Orange, California • Riverside, California + 13 more
Source: ClinicalTrials.gov public record
Updated Sep 2, 2012 · Synced May 22, 2026, 1:40 AM EDT
Recruiting No phase listed Observational Accepts healthy volunteers
View directory record Official record
Conditions
Stuttering, Stuttering, Childhood, Stuttering, Developmental
Interventions
Standardized assessments of speech and language abilities
Diagnostic Test
Lead sponsor
Michigan State University
Other
Eligibility
3 Years to 6 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2027
U.S. locations
1
States / cities
East Lansing, Michigan
Source: ClinicalTrials.gov public record
Updated Apr 15, 2026 · Synced May 22, 2026, 1:40 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers
View directory record Official record
Conditions
Stuttering, Childhood
Interventions
Speaking after viewing pictures with negative and neutral valence
Behavioral
Lead sponsor
Syracuse University
Other
Eligibility
3 Years to 10 Years
Enrollment
68 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2025
U.S. locations
1
States / cities
Syracuse, New York
Source: ClinicalTrials.gov public record
Updated Jan 29, 2026 · Synced May 22, 2026, 1:40 AM EDT