Independent directory Public ClinicalTrials.gov records United States
Clinical Trials Finder
Objective public record navigation
Search Results

Search by objective public record fields.

Search by query text, NCT ID, condition, intervention, sponsor, city, state, recruitment status, phase, study type, healthy volunteer eligibility, sex, or age. Results are retrieved from ClinicalTrials.gov and synchronized into the directory. Search pages remain noindex by default.

Clear filters
ClinicalTrials.gov public records Last synced Jul 22, 2026, 2:00 PM EDT

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

Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Filters: Condition: Fragile X Syndrome Clear all
Completed No phase listed Observational

Biomarker Testing and DNA Collection in Subjects Participating in Protocol 22001

NCT00823368
View directory record Official record
Conditions
Fragile X Syndrome
Interventions
STX209
Drug
Lead sponsor
Seaside Therapeutics, Inc.
Industry
Eligibility
6 Years to 40 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2009
U.S. locations
11
States / cities
Phoenix, Arizona • Los Angeles, California • Sacramento, California + 8 more
Source: ClinicalTrials.gov public record
Updated Jul 30, 2013 · Synced Jul 22, 2026, 2:00 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A PET Brain Imaging Study of mGluR5 in Subjects With Neuropsychiatric Conditions

NCT00870974
View directory record Official record
Conditions
Parkinson Disease, Huntington Disease, Autistic Spectrum Disorders, Fragile X Syndrome, Alzheimer Disease, Mild Cognitive Impairment
Interventions
[18F]FPEB
Drug
Lead sponsor
Institute for Neurodegenerative Disorders
Other
Eligibility
18 Years to 85 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2016
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jan 5, 2017 · Synced Jul 22, 2026, 2:00 PM EDT
Terminated Not applicable Interventional

Treadmill Training in Fragile X-associated Tremor/Ataxia Syndrome

NCT04428567
View directory record Official record
Conditions
Fragile X Associated Tremor-ataxia Syndrome
Interventions
Dual-Task Treadmill exercise + Cognitive Training
Behavioral
Lead sponsor
Rush University Medical Center
Other
Eligibility
50 Years and older
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Oct 27, 2021 · Synced Jul 22, 2026, 2:00 PM EDT
Completed Not applicable Interventional Results available

Trial of Minocycline to Treat Children With Fragile X Syndrome

NCT01053156
View directory record Official record
Conditions
Fragile X Syndrome
Interventions
minocycline hydrochloride, Placebo
Drug
Lead sponsor
University of California, Davis
Other
Eligibility
42 Months to 16 Years
Enrollment
66 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated May 29, 2017 · Synced Jul 22, 2026, 2:00 PM EDT
Enrolling by invitation Not applicable Interventional Accepts healthy volunteers

Parent and Infant Inter(X)Action Intervention (PIXI)

NCT03836300
View directory record Official record
Conditions
Fragile X Syndrome, Angelman Syndrome, Prader-Willi Syndrome, Dup15Q Syndrome, Duchenne Muscular Dystrophy, Phelan-McDermid Syndrome, Rett Syndrome, Smith Magenis Syndrome, Williams Syndrome, Turner Syndrome, Klinefelter Syndrome, Chromosome 22q11.2 Deletion Syndrome, Tuberous Sclerosis, Down Syndrome
Interventions
Parent-Infant Inter(X)action Intervention (PIXI)
Behavioral
Lead sponsor
RTI International
Other
Eligibility
Up to 99 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2026
U.S. locations
1
States / cities
Research Triangle Park, North Carolina
Source: ClinicalTrials.gov public record
Updated Jul 12, 2026 · Synced Jul 22, 2026, 2:00 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Memantine Treatment in Fragile X-Associated Tremor/Ataxia Syndrome

NCT00584948
View directory record Official record
Conditions
Fragile X-Associated Tremor/Ataxia Syndrome, Fragile X Premutation Carriers
Interventions
Memantine, Placebo
Drug
Lead sponsor
University of California, Davis
Other
Eligibility
30 Years to 80 Years
Enrollment
94 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2012
U.S. locations
2
States / cities
Sacramento, California • Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated May 29, 2017 · Synced Jul 22, 2026, 2:00 PM EDT
Not yet recruiting Phase 2 Interventional

Inhibition of Aggressive Behavior in Participants With Fragile X Syndrome

NCT07328529
View directory record Official record
Conditions
Aggressive Behavior in Fragile X Syndome
Interventions
SRX246, Placebo
Drug
Lead sponsor
Azevan Pharmaceuticals
Industry
Eligibility
18 Years to 45 Years · Male only
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
3
States / cities
Sacramento, California • Chicago, Illinois • Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 8, 2026 · Synced Jul 22, 2026, 2:00 PM EDT
Completed Phase 2 Interventional Results available

Ganaxolone Treatment in Children With Fragile X Syndrome

NCT01725152
View directory record Official record
Conditions
Fragile x Syndrome
Interventions
Ganaxolone, Placebo
Drug
Lead sponsor
Marinus Pharmaceuticals
Industry
Eligibility
6 Years to 17 Years
Enrollment
59 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2016
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Apr 9, 2023 · Synced Jul 22, 2026, 2:00 PM EDT
Completed Phase 2 Interventional

Effects of CX516 on Functioning in Fragile X Syndrome and Autism

NCT00054730
View directory record Official record
Conditions
Fragile X Syndrome, Autism
Interventions
CX516 (Ampalex®)
Drug
Lead sponsor
RespireRx
Industry
Eligibility
18 Years to 50 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2002
U.S. locations
2
States / cities
Sacramento, California • Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 23, 2005 · Synced Jul 22, 2026, 2:00 PM EDT
Recruiting Not applicable Interventional Accepts healthy volunteers

Alpha Auditory Entrainment for Cognitive Enhancement and Sensory Hypersensitivity in Youth With Developmental Disorders

NCT06227780
View directory record Official record
Conditions
Fragile X Syndrome, Autism Spectrum Disorder, Autistic Disorder, Asperger Syndrome
Interventions
Alpha Auditory Entrainment, Sham
Other
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
5 Years to 10 Years
Enrollment
180 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2028
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 29, 2026 · Synced Jul 22, 2026, 2:00 PM EDT
Completed Early Phase 1 Interventional Results available

Neurophysiological and Acute Pharmacological Studies in FXS Patients

NCT02998151
View directory record Official record
Conditions
Fragile X Syndrome
Interventions
Acamprosate, Lovastatin, Minocycline, Placebo, Baclofen
Drug
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
15 Years to 55 Years
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2020
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Nov 25, 2021 · Synced Jul 22, 2026, 2:00 PM EDT
Completed Phase 2Phase 3 Interventional

A Randomized Study of BPN14770 in Male Adolescents (Aged 9 to < 18 Years) With Fragile X Syndrome

NCT05163808
View directory record Official record
Conditions
Fragile X Syndrome
Interventions
zatolmilast, Placebo
Drug
Lead sponsor
Tetra Discovery Partners
Industry
Eligibility
9 Years to 18 Years · Male only
Enrollment
163 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
17
States / cities
Irvine, California • Orange, California • Sacramento, California + 14 more
Source: ClinicalTrials.gov public record
Updated Feb 3, 2026 · Synced Jul 22, 2026, 2:00 PM EDT
Completed Phase 2Phase 3 Interventional Results available

Clinical Study Of caNNabidiol in childrEn and adolesCenTs With Fragile X (CONNECT-FX)

NCT03614663
View directory record Official record
Conditions
Fragile X Syndrome
Interventions
ZYN002 - Cannabidiol Transdermal Gel, Placebo Transdermal Gel
Drug · Other
Lead sponsor
Zynerba Pharmaceuticals, Inc.
Industry
Eligibility
3 Years to 17 Years
Enrollment
212 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
17
States / cities
Phoenix, Arizona • Sacramento, California • Denver, Colorado + 13 more
Source: ClinicalTrials.gov public record
Updated Jul 5, 2022 · Synced Jul 22, 2026, 2:00 PM EDT
Completed Phase 2 Interventional Results available

Study of SPG601 in Adult Men With Fragile X Syndrome

NCT06413537
View directory record Official record
Conditions
Fragile X Syndrome
Interventions
SPG601, Placebo
Drug
Lead sponsor
Spinogenix
Industry
Eligibility
18 Years to 45 Years · Male only
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated May 25, 2026 · Synced Jul 22, 2026, 2:00 PM EDT
Withdrawn No phase listed Observational

A Non-Interventional Pilot Study to Explore the Role of Gut Flora in Autism

NCT04100863
View directory record Official record
Conditions
Autism, Autism Spectrum Disorder, Autistic Disorder, Autism, Akinetic, Autism; Atypical, Autism; Psychopathy, Autism Fragile Syndrome X, Autism With High Cognitive Abilities, Autism-Related Speech Delay, Autism, Susceptibility to, 6, Autism Spectrum Disorder High-Functioning, Autistic Thinking, Autism, Susceptibility to, X-Linked 6, Autistic Behavior
Interventions
No Intervention
Other
Lead sponsor
ProgenaBiome
Other
Eligibility
6 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2030
U.S. locations
1
States / cities
Ventura, California
Source: ClinicalTrials.gov public record
Updated Jun 4, 2025 · Synced Jul 22, 2026, 2:00 PM EDT
Enrolling by invitation Phase 1 Interventional

Sensitivity of the NIH Toolbox to Stimulant Treatment in Intellectual Disabilities

NCT05301361
View directory record Official record
Conditions
Intellectual Disability, Fragile X Syndrome, Down Syndrome, Attention Deficit Hyperactivity Disorder
Interventions
Methylphenidate Oral Solution
Drug
Lead sponsor
University of California, Davis
Other
Eligibility
6 Years to 24 Years
Enrollment
68 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
3
States / cities
Sacramento, California • Chicago, Illinois • Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Dec 14, 2025 · Synced Jul 22, 2026, 2:00 PM EDT
Completed Phase 2 Interventional Results available

Randomized Controlled Study of Donepezil in Fragile X Syndrome

NCT01120626
View directory record Official record
Conditions
Fragile X Syndrome
Interventions
donepezil, sugar pill
Drug
Lead sponsor
Stanford University
Other
Eligibility
12 Years to 29 Years
Enrollment
45 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Mar 16, 2016 · Synced Jul 22, 2026, 2:00 PM EDT
Withdrawn Phase 1 Interventional Accepts healthy volunteers

Novel Clinical Target in Fragile X Syndrome

NCT04314856
View directory record Official record
Conditions
Fragile X Syndrome (FXS)
Interventions
18F-FTC-146
Drug
Lead sponsor
Guido A. Davidzon, MD, SM
Other
Eligibility
18 Years to 65 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2022
U.S. locations
1
States / cities
Stanford, California
Source: ClinicalTrials.gov public record
Updated Nov 14, 2022 · Synced Jul 22, 2026, 2:00 PM EDT
Completed Phase 2Phase 3 Interventional

A Trial of Metformin in Individuals With Fragile X Syndrome

NCT03479476
View directory record Official record
Conditions
Fragile X Syndrome, Fragile X Mental Retardation Syndrome, Mental Retardation, X Linked, Genetic Diseases, X-Linked, Trinucleotide Repeat Expansion, Fra(X) Syndrome, Intellectual Disability, FXS, Neurobehavioral Manifestations, Sex Chromosome Disorders
Interventions
Placebo Medication, Metformin
Drug
Lead sponsor
University of California, Davis
Other
Eligibility
6 Years to 25 Years
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2024
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Jan 16, 2025 · Synced Jul 22, 2026, 2:00 PM EDT
Completed Phase 2 Interventional Results available

Treatment of Fragile-X Associated Tremor/Ataxia Syndrome (FXTAS) With Allopregnanolone

NCT02603926
View directory record Official record
Conditions
Fragile X-associated Tremor/Ataxia Syndrome
Interventions
Allopregnanolone
Drug
Lead sponsor
Randi J. Hagerman, MD
Other
Eligibility
50 Years to 85 Years
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Dec 5, 2018 · Synced Jul 22, 2026, 2:00 PM EDT
Completed Phase 2 Interventional

A Study of RO4917523 in Pediatric Patients With Fragile X Syndrome

NCT01750957
View directory record Official record
Conditions
Fragile X Syndrome
Interventions
Placebo, RO4917523
Drug
Lead sponsor
Hoffmann-La Roche
Industry
Eligibility
5 Years to 13 Years
Enrollment
47 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
20
States / cities
Long Beach, California • Sacramento, California • San Diego, California + 17 more
Source: ClinicalTrials.gov public record
Updated Aug 10, 2016 · Synced Jul 22, 2026, 2:00 PM EDT
Completed Phase 2 Interventional Results available

Citocoline for Treatment in Fragile X-associated Tremor/Ataxia Syndrome

NCT02197104
View directory record Official record
Conditions
Fragile X Tremor/Ataxia Syndrome
Interventions
citocoline
Drug
Lead sponsor
Rush University Medical Center
Other
Eligibility
18 Years to 90 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Nov 1, 2022 · Synced Jul 22, 2026, 2:00 PM EDT
Completed No phase listed Observational

Biomarker and DNA Collection in Subjects Participating in Protocol 22003

NCT00892580
View directory record Official record
Conditions
Fragile X Syndrome
Interventions
STX209
Drug
Lead sponsor
Seaside Therapeutics, Inc.
Industry
Eligibility
6 Years to 17 Years
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2009
U.S. locations
8
States / cities
Phoenix, Arizona • Los Angeles, California • New Haven, Connecticut + 5 more
Source: ClinicalTrials.gov public record
Updated Jul 30, 2013 · Synced Jul 22, 2026, 2:00 PM EDT
Withdrawn Phase 2 Interventional

Investigation of Sulindac (HLX-0201) and Gaboxadol (HLX-0206) in Male Fragile X Syndrome Patients Aged 13-40

NCT04823052
View directory record Official record
Conditions
Fragile X Syndrome
Interventions
Sulindac (HLX-0201), dose strength 1, Sulindac (HLX-0201), dose strength 2, Placebo, Gaboxadol (HLX-0206)
Drug
Lead sponsor
Healx Limited
Industry
Eligibility
13 Years to 40 Years · Male only
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022
U.S. locations
7
States / cities
Aurora, Colorado • Miami, Florida • Atlanta, Georgia + 4 more
Source: ClinicalTrials.gov public record
Updated Dec 7, 2022 · Synced Jul 22, 2026, 2:00 PM EDT