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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: "early Parkinson" Condition: Parkinson's Disease Clear all
Completed Phase 3 Interventional

Study Evaluating Sumanirole for the Treatment of the Signs and Symptoms of Early Parkinson's Disease

NCT00058838
View directory record Official record
Conditions
Parkinson Disease
Interventions
sumanirole
Drug
Lead sponsor
Pfizer
Industry
Eligibility
30 Years and older
Enrollment
854 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2004
U.S. locations
69
States / cities
Birmingham, Alabama • Huntsville, Alabama • Little Rock, Arkansas + 60 more
Source: ClinicalTrials.gov public record
Updated Jun 6, 2006 · Synced Jul 23, 2026, 3:29 PM EDT
Completed Phase 2 Interventional Results available

Randomized, Double-Blind Clinical Trial for Parkinson's Disease (Early and Moderate)

NCT04928287
View directory record Official record
Conditions
Parkinson Disease
Interventions
HB-adMSCs, Placebo
Biological · Other
Lead sponsor
Hope Biosciences Research Foundation
Industry
Eligibility
18 Years to 75 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Sugar Land, Texas
Source: ClinicalTrials.gov public record
Updated Apr 14, 2026 · Synced Jul 23, 2026, 3:29 PM EDT
Completed Phase 3 Interventional Results available

Fixed-Dose Trial in Early Parkinson's Disease (PD)

NCT04201093
View directory record Official record
Conditions
Parkinson Disease
Interventions
Tavapadon, Placebo
Drug
Lead sponsor
AbbVie
Industry
Eligibility
40 Years to 80 Years
Enrollment
529 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2024
U.S. locations
27
States / cities
Birmingham, Alabama • Little Rock, Arkansas • Fountain Valley, California + 24 more
Source: ClinicalTrials.gov public record
Updated Jul 27, 2025 · Synced Jul 23, 2026, 3:29 PM EDT
Completed Phase 2 Interventional

A Fourteen-Week Placebo-Controlled Dose-Response Efficacy and Safety Study of NS 2330 in Early Parkinson's Disease Patients (Study for Proof of Concept in Early Parkinson's Disease of a Triple Reuptake Inhibitor, NS 2330 / SCEPTRE)

NCT00148486
View directory record Official record
Conditions
Parkinson Disease
Interventions
NS 2330
Drug
Lead sponsor
Boehringer Ingelheim
Industry
Eligibility
40 Years to 80 Years
Enrollment
261 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2003
U.S. locations
47
States / cities
Peoria, Arizona • Tucson, Arizona • Fountain Valley, California + 38 more
Source: ClinicalTrials.gov public record
Updated Oct 28, 2013 · Synced Jul 23, 2026, 3:29 PM EDT
Completed Phase 3 Interventional

Onset Motor Complications Using REQUIP CR (Ropinirole Controlled-release) As Add-on Therapy To L-dopa In Parkinson's

NCT00363727
View directory record Official record
Conditions
Parkinson's Disease, Parkinson Disease, Dyskinesias
Interventions
ropinirole controlled-release (REQUIP CR) for RLS
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
30 Years to 70 Years
Enrollment
209 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2006
U.S. locations
69
States / cities
Anniston, Alabama • Birmingham, Alabama • Phoenix, Arizona + 61 more
Source: ClinicalTrials.gov public record
Updated Jan 17, 2017 · Synced Jul 23, 2026, 3:29 PM EDT
Terminated Phase 2Phase 3 Interventional Results available

Clinical Trial to Evaluate the Safety and Tolerability of Hydrogen in Patients With Parkinson's Disease

NCT03971617
View directory record Official record
Conditions
Parkinson Disease
Interventions
Hydrogen, Placebo oral tablet
Drug
Lead sponsor
Stony Brook University
Other
Eligibility
40 Years to 80 Years
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Stony Brook, New York
Source: ClinicalTrials.gov public record
Updated Apr 11, 2023 · Synced Jul 23, 2026, 3:29 PM EDT
Completed Phase 3 Interventional Results available

Efficacy of Isradipine in Early Parkinson Disease

NCT02168842
View directory record Official record
Conditions
Parkinson Disease
Interventions
Isradipine, Placebo (for Isradipine)
Drug
Lead sponsor
University of Rochester
Other
Eligibility
30 Years and older
Enrollment
336 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
47
States / cities
Birmingham, Alabama • Sun City, Arizona • Fountain Valley, California + 40 more
Source: ClinicalTrials.gov public record
Updated Jan 13, 2020 · Synced Jul 23, 2026, 3:29 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

The Role of Dopamine in Motor Learning in Healthy Subjects and Patients With Parkinson's Disease

NCT00032812
View directory record Official record
Conditions
Parkinson Disease, Healthy
Interventions
Raclopride
Drug
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
Not listed
Enrollment
64 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2002 – 2004
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Jul 23, 2026, 3:29 PM EDT
Completed Not applicable Interventional Results available

Bracing for Walking in Parkinson's Disease

NCT03192046
View directory record Official record
Conditions
Gait Disorders, Neurologic, Parkinson Disease
Interventions
Carbon Fiber Ankle Foot Orthosis (AFO), Standardized walking/exercise program
Device · Other
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
30 Years to 85 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2020
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Mar 22, 2022 · Synced Jul 23, 2026, 3:29 PM EDT
Completed Phase 4 Interventional Results available

A Randomized, Double-blind, Active (Pramipexole 0.5 mg Tid) and Placebo Controlled, Study of Pramipexole Given 0.5 mg and 0.75 mg Bid Over 12-week Treatment in Early Parkinson's Disease (PD) Patients

NCT00402233
View directory record Official record
Conditions
Parkinson Disease
Interventions
Pramipexole, Placebo
Drug
Lead sponsor
Boehringer Ingelheim
Industry
Eligibility
31 Years and older
Enrollment
312 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2006
U.S. locations
39
States / cities
Phoenix, Arizona • Little Rock, Arkansas • Fountain Valley, California + 32 more
Source: ClinicalTrials.gov public record
Updated May 15, 2014 · Synced Jul 23, 2026, 3:29 PM EDT
Completed No phase listed Observational

Hereditary Parkinson s Disease Natural History Protocol

NCT02511015
View directory record Official record
Conditions
Parkinson Disease 6, Early-Onset, Parkinson Disease (Autosomal Recessive, Early Onset) 7, Human, Parkinson Disease Autosomal Recessive, Early Onset, Parkinson Disease, Autosomal Recessive Early-Onset, Digenic, Pink1/Dj1
Interventions
Not listed
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
18 Years to 80 Years
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 23, 2026 · Synced Jul 23, 2026, 3:29 PM EDT
Completed Phase 1Phase 2 Interventional

Safety, Tolerability, Pharmacokinetics and Pharmacodynamics of ITI-214 in Parkinson's Disease

NCT03257046
View directory record Official record
Conditions
Parkinson Disease
Interventions
ITI-214, Placebo
Drug · Other
Lead sponsor
Intra-Cellular Therapies, Inc.
Industry
Eligibility
50 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
2
States / cities
Atlanta, Georgia • Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Dec 19, 2018 · Synced Jul 23, 2026, 3:29 PM EDT
Completed Phase 4 Interventional Results available

A Fixed Dose, Dose Response Study for Ropinirole Prolonged Release in Patients With Early Stage Parkinson's Disease

NCT01485172
View directory record Official record
Conditions
Parkinson Disease
Interventions
ropinirole monotherapy, placebo monotherapy
Drug
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
30 Years and older
Enrollment
186 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
11
States / cities
Fountain Valley, California • Pasadena, California • Reseda, California + 8 more
Source: ClinicalTrials.gov public record
Updated Jun 19, 2018 · Synced Jul 23, 2026, 3:29 PM EDT
Recruiting Not applicable Interventional

Evaluation of a Decision Aid for Deep Brain Stimulation Surgery for Parkinson's Disease

NCT06446505
View directory record Official record
Conditions
Parkinson Disease
Interventions
Deep Brain Stimulation Decision Aid
Other
Lead sponsor
University of Colorado, Denver
Other
Eligibility
18 Years and older
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Jun 5, 2024 · Synced Jul 23, 2026, 3:29 PM EDT
Recruiting Phase 2Phase 3 Interventional

A Study to Determine if BHV-8000 is Effective, Safe and Tolerable as a Treatment for Adults Living With Early Parkinson's Disease

NCT06976268
View directory record Official record
Conditions
Parkinson Disease
Interventions
BHV-8000 10mg, BHV-8000 20 mg, Placebo
Drug
Lead sponsor
Biohaven Therapeutics Ltd.
Industry
Eligibility
40 Years to 80 Years
Enrollment
550 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
15
States / cities
Birmingham, Alabama • Los Angeles, California • Farmington, Connecticut + 12 more
Source: ClinicalTrials.gov public record
Updated Jul 9, 2026 · Synced Jul 23, 2026, 3:29 PM EDT
Completed Phase 3 Interventional Results available

Long-term Safety of Rivastigmine Capsule and Patch in Patients With Mild to Moderately-severe Dementia Associated With Parkinson's Disease (PDD)

NCT00623103
View directory record Official record
Conditions
Parkinson's Disease Dementia
Interventions
Rivastigmine capsule, Rivastigmine transdermal patch
Drug
Lead sponsor
Novartis
Industry
Eligibility
50 Years to 85 Years
Enrollment
583 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2008
U.S. locations
17
States / cities
Birmingham, Alabama • Phoenix, Arizona • Reseda, California + 14 more
Source: ClinicalTrials.gov public record
Updated Nov 27, 2011 · Synced Jul 23, 2026, 3:29 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Cell Studies of Parkinson's Disease

NCT00076505
View directory record Official record
Conditions
Parkinson Disease
Interventions
Not listed
Lead sponsor
National Human Genome Research Institute (NHGRI)
NIH
Eligibility
18 Years and older
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2006
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Jul 23, 2026, 3:29 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Blood Biomarker in Early Parkinson's Disease

NCT03384797
View directory record Official record
Conditions
Parkinson Disease
Interventions
Not listed
Lead sponsor
Duke University
Other
Eligibility
50 Years and older
Enrollment
65 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 9, 2019 · Synced Jul 23, 2026, 3:29 PM EDT
Not yet recruiting Not applicable Interventional

SwallowFIT Study in Parkinson's Disease

NCT07356414
View directory record Official record
Conditions
PARKINSON DISEASE (Disorder)
Interventions
SwallowFit
Behavioral
Lead sponsor
The University of Texas Health Science Center at San Antonio
Other
Eligibility
35 Years to 90 Years
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Jul 12, 2026 · Synced Jul 23, 2026, 3:29 PM EDT
Recruiting Not applicable Interventional

Spinal Cord Stimulation for Parkinson's Disease Rehabilitation

NCT06804642
View directory record Official record
Conditions
Parkinson Disease
Interventions
Spinal cord transcutaneous stimulation (scTS)
Device
Lead sponsor
University of Louisville
Other
Eligibility
18 Years to 80 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2035
U.S. locations
1
States / cities
Louisville, Kentucky
Source: ClinicalTrials.gov public record
Updated Mar 10, 2026 · Synced Jul 23, 2026, 3:29 PM EDT
Completed No phase listed Observational

Sequence Effect in Parkinson's Disease

NCT00431366
View directory record Official record
Conditions
Parkinson's Disease
Interventions
Not listed
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
18 Years and older
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2008
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Jul 23, 2026, 3:29 PM EDT
Not listed No phase listed Observational

Microbiome Composition and Function Contributes to Cognitive Impairment and Neuroinflammation in Parkinson's Disease

NCT05419453
View directory record Official record
Conditions
Parkinson Disease
Interventions
Not listed
Lead sponsor
California State University, San Bernardino
Other
Eligibility
55 Years to 85 Years
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
1
States / cities
San Bernardino, California
Source: ClinicalTrials.gov public record
Updated Feb 7, 2024 · Synced Jul 23, 2026, 3:29 PM EDT
Completed Phase 2 Interventional Results available

Modafinil for Freezing of Gait (FOG) in Parkinson's Disease (PD)

NCT03083132
View directory record Official record
Conditions
Parkinson Disease
Interventions
modafinil 50mg, Placebo oral capsule
Drug
Lead sponsor
University of Arkansas
Other
Eligibility
50 Years to 90 Years
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Little Rock, Arkansas
Source: ClinicalTrials.gov public record
Updated Oct 26, 2021 · Synced Jul 23, 2026, 3:29 PM EDT
Completed Phase 3 Interventional Results available

Levodopa-Carbidopa Intestinal Gel Open-Label Study in Advanced Parkinson's Disease

NCT00335153
View directory record Official record
Conditions
Advanced Parkinson's Disease
Interventions
Levodopa-carbidopa intestinal gel, CADD-Legacy® 1400 ambulatory infusion pump, PEG tube, J-tube
Drug · Device
Lead sponsor
AbbVie (prior sponsor, Abbott)
Industry
Eligibility
30 Years and older
Enrollment
354 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2012
U.S. locations
31
States / cities
Birmingham, Alabama • Fountain Valley, California • Los Angeles, California + 25 more
Source: ClinicalTrials.gov public record
Updated Jan 15, 2015 · Synced Jul 23, 2026, 3:29 PM EDT