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Showing 1–24 of 210 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Trisomy 21 Clear all
Completed No phase listed Observational

Gait Parameters of Persons With Down Syndrome With and Without Orthotics Using GaitRite

NCT01390558
View directory record Official record
Conditions
Down Syndrome
Interventions
custom orthotics
Procedure
Lead sponsor
Oregon Health and Science University
Other
Eligibility
2 Years to 80 Years
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2018
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Feb 14, 2019 · Synced Jul 21, 2026, 11:11 AM EDT
Not yet recruiting Phase 1 Interventional

NAD Augmentation to Prevent or Reverse Alzheimer's Disease in People With Down Syndrome

NCT07278492
View directory record Official record
Conditions
Down Syndrome (DS)
Interventions
MIB-626, Placebo
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years and older
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
2
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 24, 2026 · Synced Jul 21, 2026, 11:11 AM EDT
Completed No phase listed Observational

Down Syndrome Autonomic Nervous System Induction Bradycardia

NCT05120531
View directory record Official record
Conditions
Down Syndrome, Bradycardia
Interventions
Monitoring patients undergoing surgery to look for association between ANS activity and bradycardia
Other
Lead sponsor
Children's Hospital Medical Center, Cincinnati
Other
Eligibility
1 Month to 8 Years
Enrollment
195 participants
Timeline
2022 – 2023
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Dec 14, 2023 · Synced Jul 21, 2026, 11:11 AM EDT
Completed Not applicable Interventional

Impact of an Orthotic Garment on Gross Motor Skills for Infants With Down Syndrome

NCT04603352
View directory record Official record
Conditions
Down Syndrome
Interventions
Hip Helpers home program
Other
Lead sponsor
University of St. Augustine for Health Sciences
Other
Eligibility
3 Months to 15 Months
Enrollment
17 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2025
U.S. locations
3
States / cities
San Marcos, California • Saint Augustine, Florida • Austin, Texas
Source: ClinicalTrials.gov public record
Updated Jul 17, 2025 · Synced Jul 21, 2026, 11:11 AM EDT
Active, not recruiting Phase 2 Interventional

Medications for Obstructive Sleep Apnea to Improve Cognition in Children With Down Syndrome

NCT05933603
View directory record Official record
Conditions
Obstructive Sleep Apnea, Down Syndrome
Interventions
Atomoxetine and Oxybutynin (ato-oxy)
Drug
Lead sponsor
University of Arizona
Other
Eligibility
6 Years to 17 Years
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Apr 6, 2026 · Synced Jul 21, 2026, 11:11 AM EDT
Terminated Phase 3 Interventional

LIFE-DSR-Biomarker Sub-study of Biomarkers in Down Syndrome Related Alzheimer's Disease (DS-AD)

NCT06860373
View directory record Official record
Conditions
Down Syndrome
Interventions
[18F]MK-6240
Biological
Lead sponsor
LuMind IDSC Foundation
Other
Eligibility
35 Years to 55 Years
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2024
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Mar 5, 2025 · Synced Jul 21, 2026, 11:11 AM EDT
Completed Not applicable Interventional Results available

Treadmill Training and Orthotic Use in Infants With Down Syndrome

NCT00825175
View directory record Official record
Conditions
Down Syndrome
Interventions
Treadmill Training, Supramalleolar Orthoses
Behavioral · Device
Lead sponsor
University of Michigan
Other
Eligibility
6 Months to 36 Months
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Dec 3, 2017 · Synced Jul 21, 2026, 11:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Social Support and Stress Reduction for Caregivers of Young Adults With IDD

NCT05938998
View directory record Official record
Conditions
Burden, Caregiver
Interventions
Yoga; Support Group
Behavioral
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
18 Years and older
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Sep 11, 2025 · Synced Jul 21, 2026, 11:11 AM EDT
Completed Not applicable Interventional

Proactive Speech and Language Intervention for Infants With Down Syndrome

NCT06450509
View directory record Official record
Conditions
Down Syndrome
Interventions
Babble Boot Camp
Behavioral
Lead sponsor
Arizona State University
Other
Eligibility
0 Months to 12 Months
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Tempe, Arizona
Source: ClinicalTrials.gov public record
Updated Apr 28, 2026 · Synced Jul 21, 2026, 11:11 AM EDT
Not listed No phase listed Observational Accepts healthy volunteers

Non-Invasive Determination of Fetal Chromosome Abnormalities

NCT00891852
View directory record Official record
Conditions
Down Syndrome (Trisomy 21), Edward's Syndrome (Trisomy 18), Patau Syndrome (Trisomy 13), Klinefelter Syndrome (47, XXY), and Other Chromosome, Abnormalities.
Interventions
Not listed
Lead sponsor
Lenetix Medical Screening Laboratory
Industry
Eligibility
18 Years and older · Female only
Enrollment
1,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009
U.S. locations
7
States / cities
Rockville, Maryland • Moristown, New Jersey • Mineola, New York + 3 more
Source: ClinicalTrials.gov public record
Updated Apr 30, 2009 · Synced Jul 21, 2026, 11:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Balance Bike Training in Down Syndrome

NCT03677245
View directory record Official record
Conditions
Down Syndrome, Postural Balance
Interventions
Strider Balance Bike
Other
Lead sponsor
University of Mississippi Medical Center
Other
Eligibility
5 Years to 17 Years
Enrollment
8 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Flowood, Mississippi
Source: ClinicalTrials.gov public record
Updated Apr 20, 2020 · Synced Jul 21, 2026, 11:11 AM EDT
Completed No phase listed Observational Accepts healthy volunteers Results available

National Prevalence and Impact of Noninvasive Prenatal Testing

NCT02284399
View directory record Official record
Conditions
Aneuploidy
Interventions
non-invasive prenatal testing
Other
Lead sponsor
Obstetrix Medical Group
Industry
Eligibility
18 Years to 60 Years · Female only
Enrollment
4,488 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2016
U.S. locations
7
States / cities
Phoenix, Arizona • Long Beach, California • San Jose, California + 4 more
Source: ClinicalTrials.gov public record
Updated Jun 18, 2019 · Synced Jul 21, 2026, 11:11 AM EDT
Completed No phase listed Observational

Noninvasive Screening for Fetal Aneuploidy: A New Maternal Plasma Marker

NCT00971334
View directory record Official record
Conditions
Pregnancy, Aneuploidy, Down Syndrome, Edwards Syndrome
Interventions
Not listed
Lead sponsor
Sequenom, Inc.
Industry
Eligibility
18 Years and older · Female only
Enrollment
2,502 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
30
States / cities
Mobile, Alabama • La Mesa, California • San Diego, California + 21 more
Source: ClinicalTrials.gov public record
Updated Feb 16, 2012 · Synced Jul 21, 2026, 11:11 AM EDT
Completed No phase listed Observational

A Non-Drug Study of The Suitability of Neurocognitive Tests And Functioning Scales For The Measurement of Cognitive And Functioning Changes in Individuals With Down Syndrome

NCT01580384
View directory record Official record
Conditions
Down Syndrome
Interventions
Not listed
Lead sponsor
Hoffmann-La Roche
Industry
Eligibility
12 Years to 30 Years
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
2
States / cities
Tucson, Arizona • Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 2, 2015 · Synced Jul 21, 2026, 11:11 AM EDT
Completed Not applicable Interventional Results available

Promotion of Physical Activity in Adolescents With Intellectual and Developmental Disabilities

NCT03684512
View directory record Official record
Conditions
Adolescent Behavior, Intellectual Disability, Down Syndrome, Physical Activity
Interventions
Group Exercise Sessions, Individual Support Sessions, Facebook Group
Behavioral
Lead sponsor
University of Kansas
Other
Eligibility
10 Years to 21 Years
Enrollment
116 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
Lawrence, Kansas
Source: ClinicalTrials.gov public record
Updated Jul 2, 2023 · Synced Jul 21, 2026, 11:11 AM EDT
Completed No phase listed Observational

Surgical Treatment of Children With OSA and Small Tonsils or Down Syndrome

NCT05154214
View directory record Official record
Conditions
Obstructive Sleep Apnea of Child
Interventions
Adenotonsillectomy, Drug-induced sleep endoscopy directed surgery
Procedure
Lead sponsor
Oregon Health and Science University
Other
Eligibility
2 Years to 18 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Sep 28, 2025 · Synced Jul 21, 2026, 11:11 AM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

Cholinergic Integrity in Down Syndrome in Association With Aging, Alzheimer's Disease Pathology, and Cognition

NCT05231798
View directory record Official record
Conditions
Down Syndrome, Down Syndrome, Partial Trisomy 21, Alzheimer Disease
Interventions
[18F]-FEOBV Radiotracer
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 55 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2027
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jun 21, 2026 · Synced Jul 21, 2026, 11:11 AM EDT
Completed Phase 1Phase 2 Interventional Results available

Rivastigmine Study in Adolescents With Down Syndrome

NCT01084135
View directory record Official record
Conditions
Down Syndrome
Interventions
Rivastigmine, Liquid Placebo
Drug · Other
Lead sponsor
Duke University
Other
Eligibility
10 Years to 17 Years
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2014
U.S. locations
2
States / cities
Baltimore, Maryland • Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 5, 2015 · Synced Jul 21, 2026, 11:11 AM EDT
Not yet recruiting Phase 1 Interventional

Escalating Doses of Memantine in Down Syndrome (MEDS-123)

NCT07531940
View directory record Official record
Conditions
Down Syndrome, Intellectual Disability
Interventions
Memantine
Drug
Lead sponsor
University Hospitals Cleveland Medical Center
Other
Eligibility
15 Years to 32 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated May 10, 2026 · Synced Jul 21, 2026, 11:11 AM EDT
Terminated Phase 2 Interventional Results available

Evaluating The Safety Of Donepezil Hydrochloride (Aricept) For Up To 1 Year In The Treatment Of The Cognitive Dysfunction Exhibited By Children With Down Syndrome - Follow-Up To A 10-Week, Double-Blind, Placebo-Controlled Trial

NCT00675025
View directory record Official record
Conditions
Down Syndrome
Interventions
Donepezil hydrochloride (Aricept)
Drug
Lead sponsor
Eisai Inc.
Industry
Eligibility
10 Years to 17 Years
Enrollment
117 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008
U.S. locations
31
States / cities
Phoenix, Arizona • Little Rock, Arkansas • Los Angeles, California + 24 more
Source: ClinicalTrials.gov public record
Updated Mar 28, 2021 · Synced Jul 21, 2026, 11:11 AM 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 21, 2026, 11:11 AM EDT
Completed Phase 4 Interventional Results available

Efficacy and Safety of Memantine Hydrochloride in Enhancing the Cognitive Abilities of Young Adults With Down Syndrome

NCT01112683
View directory record Official record
Conditions
Down Syndrome
Interventions
Memantine, Placebo
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years to 32 Years
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Jan 31, 2013 · Synced Jul 21, 2026, 11:11 AM EDT
Completed No phase listed Observational

MatErnal BLood IS Source to Accurately Diagnose Fetal Aneuploidy

NCT01122524
View directory record Official record
Conditions
Pregnant Women, Prenatal Care
Interventions
Not listed
Lead sponsor
Verinata Health, Inc.
Industry
Eligibility
18 Years and older · Female only
Enrollment
10,000 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
11
States / cities
Los Angeles, California • San Francisco, California • Fort Collins, Colorado + 8 more
Source: ClinicalTrials.gov public record
Updated Oct 9, 2011 · Synced Jul 21, 2026, 11:11 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Oxygen Uptake Kinetics During Submaximal Exercise in Adults With Down Syndrome

NCT05995223
View directory record Official record
Conditions
Down Syndrome
Interventions
Submaximal exercise protocol
Other
Lead sponsor
University of Nevada, Las Vegas
Other
Eligibility
18 Years to 35 Years
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Las Vegas, Nevada
Source: ClinicalTrials.gov public record
Updated Jun 30, 2024 · Synced Jul 21, 2026, 11:11 AM EDT