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ClinicalTrials.gov public records Last synced Oct 10, 2026, 2:19 PM EDT

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Showing 1–24 of 208 matching trials from the live ClinicalTrials.gov search.
Filters: "early Parkinson" Condition: Parkinson's Disease Clear all
Completed Phase 3 Interventional

A Study to Evaluate Fixed Dose Carbidopa/Levodopa/Entacapone Versus Immediate Release Carbidopa/Levodopa

NCT00134966
View directory record Official record
Conditions
Parkinson's Disease
Interventions
capsules containing: carbidopa (25 mg), levodopa (100 mg), entacapone (200 mg)
Drug
Lead sponsor
Novartis
Industry
Eligibility
30 Years to 80 Years
Enrollment
493 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2007
U.S. locations
17
States / cities
Phoenix, Arizona • La Jolla, California • Reseda, California + 13 more
Source: ClinicalTrials.gov public record
Updated May 17, 2017 · Synced Oct 10, 2026, 2:19 PM EDT
Completed Phase 4 Interventional Results available

Ophthalmologic Safety Study of Pramipexole Immediate Release (IR) Versus Ropinirole in Early Parkinson's Disease (PD) Patients

NCT00144300
View directory record Official record
Conditions
Parkinson Disease
Interventions
Mirapex, Requip
Drug
Lead sponsor
Boehringer Ingelheim
Industry
Eligibility
30 Years and older
Enrollment
246 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2005
U.S. locations
21
States / cities
Birmingham, Alabama • Little Rock, Arkansas • Fountain Valley, California + 15 more
Source: ClinicalTrials.gov public record
Updated Mar 14, 2014 · Synced Oct 10, 2026, 2:19 PM EDT
Completed Phase 4 Interventional Results available

Trial to Evaluate The Efficacy Of Rotigotine on Parkinson's Disease-Associated Motor Symptoms And Apathy

NCT01782222
View directory record Official record
Conditions
Idiopathic Parkinson's Disease
Interventions
Rotigotine, Placebo
Drug · Other
Lead sponsor
UCB BIOSCIENCES GmbH
Industry
Eligibility
18 Years and older
Enrollment
122 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
25
States / cities
Birmingham, Alabama • Oxnard, California • Ormond Beach, Florida + 21 more
Source: ClinicalTrials.gov public record
Updated Aug 31, 2018 · Synced Oct 10, 2026, 2:19 PM EDT
Completed Phase 2 Interventional

Phase 2A Study of GM 608 in Mild to Moderate Parkinson Disease

NCT01850381
View directory record Official record
Conditions
Parkinson's Disease
Interventions
GM608, Placebo Comparator
Drug
Lead sponsor
Genervon Biopharmaceuticals, LLC
Industry
Eligibility
30 Years and older
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 8, 2019 · Synced Oct 10, 2026, 2:19 PM EDT
Not listed Phase 2 Interventional Accepts healthy volunteers

A Study to Evaluate Safety and Efficacy of KM-819 in Healthy Adults and Participants with Parkinson's Disease

NCT05670782
View directory record Official record
Conditions
Parkinson Disease
Interventions
KM-819, Placebo
Drug
Lead sponsor
FAScinate Therapeutics Inc.
Industry
Eligibility
40 Years and older
Enrollment
314 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
3
States / cities
Glendale, California • San Diego, California • Royal Oak, Michigan
Source: ClinicalTrials.gov public record
Updated Mar 5, 2025 · Synced Oct 10, 2026, 2:19 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 4, 2008 · Synced Oct 10, 2026, 2:19 PM EDT
Completed No phase listed Observational

Parkinson's Genes and Environment Study

NCT00367900
View directory record Official record
Conditions
Parkinson's Disease
Interventions
Not listed
Lead sponsor
National Institute of Environmental Health Sciences (NIEHS)
NIH
Eligibility
50 Years and older
Enrollment
3,100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2014
U.S. locations
1
States / cities
Research Triangle Park, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 18, 2021 · Synced Oct 10, 2026, 2:19 PM EDT
Completed Phase 3 Interventional Results available

Long-term Safety Study of Open-label Pramipexole Extended Release (ER) in Patients With Early Parkinson´s Disease (PD).

NCT00601523
View directory record Official record
Conditions
Parkinson Disease
Interventions
Placebo, Pramipexole
Drug
Lead sponsor
Boehringer Ingelheim
Industry
Eligibility
30 Years and older
Enrollment
511 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2008
U.S. locations
10
States / cities
Sun City, Arizona • Tempe, Arizona • La Jolla, California + 7 more
Source: ClinicalTrials.gov public record
Updated Jun 9, 2014 · Synced Oct 10, 2026, 2:19 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Systemic Synuclein Sampling Study (S4)

NCT02572713
View directory record Official record
Conditions
Parkinson's Disease
Interventions
Biofluid samplings, Tissue samplings, DaTSCAN™
Procedure · Drug
Lead sponsor
Michael J. Fox Foundation for Parkinson's Research
Other
Eligibility
40 Years and older
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
5
States / cities
Birmingham, Alabama • Scottsdale, Arizona • New Haven, Connecticut + 2 more
Source: ClinicalTrials.gov public record
Updated Aug 17, 2017 · Synced Oct 10, 2026, 2:19 PM EDT
Completed Phase 2 Interventional

Phase 2a Study of VTX3232 in Parkinson's Disease

NCT06556173
View directory record Official record
Conditions
Idiopathic Parkinson Disease
Interventions
VTX3232
Drug
Lead sponsor
Zomagen Biosciences Ltd.
Industry
Eligibility
40 Years to 80 Years
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Apr 15, 2026 · Synced Oct 10, 2026, 2:19 PM EDT
Completed No phase listed Observational Results available

Amyloidopathy, Cholinopathy, Dopamine Responsiveness and Freezing of Gait in PD

NCT03647137
View directory record Official record
Conditions
Parkinson's Disease
Interventions
Detailed motor testing, including FoG, in PD subjects
Other
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
50 Years and older
Enrollment
53 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2021
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jan 5, 2024 · Synced Oct 10, 2026, 2:19 PM EDT
Completed Phase 1 Interventional

Study of the Fecal Microbiome in Patients With Parkinson's Disease

NCT03671785
View directory record Official record
Conditions
Parkinson Disease
Interventions
PRIM-DJ2727, Placebo oral capsule
Drug
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
55 Years to 75 Years
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated May 24, 2023 · Synced Oct 10, 2026, 2:19 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Increased Gut Permeability to Lipopolysaccharides (LPS) in Parkinson's Disease

NCT01155492
View directory record Official record
Conditions
Parkinson's Disease, Multiple System Atrophy
Interventions
Not listed
Lead sponsor
Rush University Medical Center
Other
Eligibility
25 Years and older
Enrollment
43 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2013
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 30, 2013 · Synced Oct 10, 2026, 2:19 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Multidisciplinary Lifestyle Interventions for Neurological Disorders During the Silent Phase

NCT05984056
View directory record Official record
Conditions
Neurological Disorder
Interventions
Multidisciplinary lifestyle interventions
Behavioral
Lead sponsor
Vineet Punia MD
Other
Eligibility
50 Years and older
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2036
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jul 10, 2026 · Synced Oct 10, 2026, 2:19 PM EDT
Completed Phase 3 Interventional

SLV 308 and Pramipexole for Treatment of Patients With Early Parkinson Disease

NCT00335166
View directory record Official record
Conditions
Early Stage Parkinson Disease
Interventions
Pardaprunox, pramipexole, Placebo Comparator
Drug
Lead sponsor
Solvay Pharmaceuticals
Industry
Eligibility
30 Years and older
Enrollment
330 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
17
States / cities
Birmingham, Alabama • Oceanside, California • Oxnard, California + 13 more
Source: ClinicalTrials.gov public record
Updated Apr 3, 2008 · Synced Oct 10, 2026, 2:19 PM EDT
Terminated Phase 2 Interventional Results available

PROSEEK: A Phase 2 Study In Early Parkinson's Disease Patients Evaluating The Safety And Efficacy Of Abl Tyrosine Kinase Inhibition Using K0706

NCT03655236
View directory record Official record
Conditions
Early Parkinson Disease
Interventions
K0706, placebo
Drug · Other
Lead sponsor
Sun Pharma Advanced Research Company Limited
Industry
Eligibility
50 Years and older
Enrollment
513 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2024
U.S. locations
34
States / cities
Phoenix, Arizona • Little Rock, Arkansas • Los Angeles, California + 30 more
Source: ClinicalTrials.gov public record
Updated Jul 25, 2025 · Synced Oct 10, 2026, 2:19 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 28, 2025 · Synced Oct 10, 2026, 2:19 PM EDT
Completed No phase listed Observational

Diagnosis of PD and PD Progression Using DWI

NCT02837172
View directory record Official record
Conditions
Parkinson's Disease
Interventions
Diffusion Weighted Imaging (DWI)
Other
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
19 Years and older
Enrollment
58 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2019
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Jun 19, 2019 · Synced Oct 10, 2026, 2:19 PM EDT
Completed Phase 1 Interventional

A Study of the Safety and Tolerability of a Single Dose Administration of CVT-301 (Levodopa Inhalation Powder)

NCT02807675
View directory record Official record
Conditions
Parkinson's Disease
Interventions
CVT-301, LIP, Placebo
Drug · Other
Lead sponsor
Acorda Therapeutics
Industry
Eligibility
30 Years to 85 Years
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016
U.S. locations
11
States / cities
Fountain Valley, California • Boca Raton, Florida • Hallandale, Florida + 8 more
Source: ClinicalTrials.gov public record
Updated Jan 30, 2017 · Synced Oct 10, 2026, 2:19 PM EDT
Completed Phase 3 Interventional

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

NCT00036218
View directory record Official record
Conditions
Parkinson Disease
Interventions
sumanirole, ropinirole
Drug
Lead sponsor
Pfizer
Industry
Eligibility
30 Years and older
Enrollment
600 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2003
U.S. locations
93
States / cities
Hot Springs, Arkansas • Little Rock, Arkansas • Carmichael, California + 81 more
Source: ClinicalTrials.gov public record
Updated Jun 7, 2006 · Synced Oct 10, 2026, 2:19 PM EDT
Terminated No phase listed Observational

The Long Term Impact of Initiating Pramipexole Versus Levodopa in Early Parkinson's Disease (CALM-PD Cohort Study)

NCT00804479
View directory record Official record
Conditions
Parkinson's Disease
Interventions
No intervention.
Other
Lead sponsor
University of Rochester
Other
Eligibility
Not listed
Enrollment
222 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2004
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Jan 21, 2016 · Synced Oct 10, 2026, 2:19 PM EDT
Completed Phase 1Phase 2 Interventional

NE3107 Activity and Safety in Patients With Parkinson's Disease Using Levodopa

NCT05083260
View directory record Official record
Conditions
Parkinson Disease
Interventions
NE3107, placebo
Drug
Lead sponsor
BioVie Inc.
Industry
Eligibility
30 Years to 80 Years
Enrollment
46 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
16
States / cities
Englewood, Colorado • Boca Raton, Florida • Hallandale, Florida + 10 more
Source: ClinicalTrials.gov public record
Updated Feb 8, 2023 · Synced Oct 10, 2026, 2:19 PM EDT
Completed Phase 3 Interventional Results available

Efficacy and Safety of Carbidopa/Levodopa/Entacapone in Patients With Parkinson's Disease Requiring Initiation of Levodopa Therapy

NCT00099268
View directory record Official record
Conditions
Parkinson's Disease
Interventions
Carbidopa/levodopa/entacapone, Immediate release carbidopa/levodopa
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
30 Years to 70 Years
Enrollment
747 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2008
U.S. locations
31
States / cities
Birmingham, Alabama • Scottsdale, Arizona • La Jolla, California + 25 more
Source: ClinicalTrials.gov public record
Updated Apr 23, 2012 · Synced Oct 10, 2026, 2:19 PM EDT
Not listed Not applicable Interventional

Timing of Acute Palliative Care Consultation in Critically Ill Patients

NCT02858778
View directory record Official record
Conditions
Multiple Organ Failure, End Stage Cardiac Failure, End Stage Chronic Obstructive Airways Disease, Chronic Kidney Disease Stage 5, Hepatic Encephalopathy, Sepsis, Dementia, Multiple Sclerosis, Parkinson's Disease, In-Hospital Cardiac Arrest, Solid Organ Cancer
Interventions
Early order of palliative care consultation
Other
Lead sponsor
Wayne State University
Other
Eligibility
65 Years and older
Enrollment
120 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2016
U.S. locations
2
States / cities
Detroit, Michigan
Source: ClinicalTrials.gov public record
Updated Aug 8, 2016 · Synced Oct 10, 2026, 2:19 PM EDT