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ClinicalTrials.gov public records Last synced Oct 17, 2026, 6:50 PM EDT

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Showing 121–144 of 253 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Levodopa Clear all
Completed Phase 3 Interventional Results available

A Study to Evaluate the Safety and Tolerability of ABBV-951 in Subjects With Parkinson's Disease (PD)

NCT03781167
View directory record Official record
Conditions
Parkinson's Disease (PD)
Interventions
ABBV-951
Drug
Lead sponsor
AbbVie
Industry
Eligibility
30 Years and older
Enrollment
244 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
24
States / cities
Birmingham, Alabama • Sun City, Arizona • Fountain Valley, California + 21 more
Source: ClinicalTrials.gov public record
Updated Oct 23, 2023 · Synced Oct 17, 2026, 6:50 PM EDT
Completed Phase 2 Interventional

Efficacy and Safety of AFQ056 When Combined With Increased Doses of L-dopa in Parkinson's Disease Patients With Moderate-severe L-dopa Induced Dyskinesia

NCT01092065
View directory record Official record
Conditions
Parkinson's Disease
Interventions
AFQ056 with L-dopa, Placebo
Drug
Lead sponsor
Novartis
Industry
Eligibility
30 Years to 80 Years
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
4
States / cities
Sunnyvale, California • Englewood, Colorado • Indianapolis, Indiana + 1 more
Source: ClinicalTrials.gov public record
Updated Dec 23, 2020 · Synced Oct 17, 2026, 6:50 PM EDT
Not listed Phase 3 Interventional

A Study to Assess the Safety and Efficacy of the of the Gastric-retentive AP-CD/LD in Advanced Parkinson's Patients

NCT02605434
View directory record Official record
Conditions
Parkinson's Disease
Interventions
Accordion Pill™ Carbidopa/Levodopa, Sinemet®, Placebo -AP-CD/LD, Placebo- Sinemet
Drug
Lead sponsor
Intec Pharma Ltd.
Industry
Eligibility
30 Years and older
Enrollment
420 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2019
U.S. locations
36
States / cities
Birmingham, Alabama • Phoenix, Arizona • Fountain Valley, California + 32 more
Source: ClinicalTrials.gov public record
Updated Aug 8, 2019 · Synced Oct 17, 2026, 6:50 PM EDT
Completed Phase 3 Interventional Results available

Open-Label Safety Study of ADS-5102 in PD Patients With LID

NCT02202551
View directory record Official record
Conditions
Dyskinesia, Levodopa Induced Dyskinesia (LID), Parkinson's Disease (PD)
Interventions
ADS-5102
Drug
Lead sponsor
Adamas Pharmaceuticals, Inc.
Industry
Eligibility
30 Years to 85 Years
Enrollment
223 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
54
States / cities
Birmingham, Alabama • Phoenix, Arizona • Scottsdale, Arizona + 46 more
Source: ClinicalTrials.gov public record
Updated Oct 6, 2020 · Synced Oct 17, 2026, 6:50 PM EDT
Completed No phase listed Observational

PET Scanning in Parkinson s Disease

NCT00024622
View directory record Official record
Conditions
Schizophrenia, Parkinson's Disease
Interventions
O-15 Water, 18F-Fluoro-L-dopa
Drug
Lead sponsor
National Institute of Mental Health (NIMH)
NIH
Eligibility
18 Years to 90 Years
Enrollment
502 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2002
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Oct 13, 2026 · Synced Oct 17, 2026, 6:50 PM EDT
Terminated Phase 2 Interventional Accepts healthy volunteers

Carbidopa-Levodopa in Dry AMD With Geographic Atrophy

NCT03451500
View directory record Official record
Conditions
Age Related Macular Degeneration
Interventions
carbidopa-levodopa
Drug
Lead sponsor
Snyder, Robert W., M.D., Ph.D., P.C.
Individual
Eligibility
50 Years to 85 Years
Enrollment
7 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Tucson, Arizona
Source: ClinicalTrials.gov public record
Updated Apr 25, 2024 · Synced Oct 17, 2026, 6:50 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

EMG Modules as a Novel Biomarker of Basal Ganglia Plasticity in Parkinson's Disease

NCT02896816
View directory record Official record
Conditions
Parkinson
Interventions
Surface EMG, MRI and PET Scan, Surface EMG
Other
Lead sponsor
Spaulding Rehabilitation Hospital
Other
Eligibility
18 Years to 80 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2021
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 4, 2021 · Synced Oct 17, 2026, 6:50 PM EDT
Completed Phase 4 Interventional Results available

Rasagiline as Add on to Dopamine Agonists in the Treatment of Parkinson's Disease

NCT01049984
View directory record Official record
Conditions
Parkinson's Disease
Interventions
Rasagiline, Placebo
Drug
Lead sponsor
Teva Neuroscience, Inc.
Industry
Eligibility
30 Years and older
Enrollment
328 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
58
States / cities
Phoenix, Arizona • Sun City, Arizona • Fountain Valley, California + 51 more
Source: ClinicalTrials.gov public record
Updated May 20, 2016 · Synced Oct 17, 2026, 6:50 PM EDT
Completed Phase 2 Interventional

Safety and Efficacy of AQW051 in L-dopa Induced Dyskinesias in Patients With Parkinson's Disease

NCT01474421
View directory record Official record
Conditions
Dyskinesias, Drug-induced
Interventions
AQW051, Placebo
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
30 Years to 85 Years
Enrollment
71 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
4
States / cities
Sacramento, California • Manhasset, New York • Cincinnati, Ohio + 1 more
Source: ClinicalTrials.gov public record
Updated Dec 24, 2020 · Synced Oct 17, 2026, 6:50 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 18, 2017 · Synced Oct 17, 2026, 6:50 PM EDT
Completed Phase 3 Interventional Results available

Efficacy, Safety, and Tolerability of E2007 in Levodopa Treated Parkinson's Disease Patients With Motor Fluctuations

NCT00368108
View directory record Official record
Conditions
Parkinson's Disease
Interventions
2 mg perampanel, 4 mg perampanel, placebo comparator
Drug
Lead sponsor
Eisai Inc.
Industry
Eligibility
30 Years and older
Enrollment
752 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
99
States / cities
Birmingham, Alabama • Huntsville, Alabama • Peoria, Arizona + 82 more
Source: ClinicalTrials.gov public record
Updated May 20, 2013 · Synced Oct 17, 2026, 6:50 PM EDT
Completed Phase 4 Interventional Results available

A Study of L-DOPA for Depression and Slowing in Older Adults

NCT02744391
View directory record Official record
Conditions
Major Depressive Disorder, Dysthymia, Depression Not Otherwise Specified, Decreased Processing Speed, Decreased Gait Speed
Interventions
Levodopa
Drug
Lead sponsor
New York State Psychiatric Institute
Other
Eligibility
60 Years and older
Enrollment
47 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jun 13, 2023 · Synced Oct 17, 2026, 6:50 PM EDT
Terminated Phase 1 Interventional

Buspirone, in Combination With Amantadine, for the Treatment of Levodopa-induced Dyskinesia

NCT02589340
View directory record Official record
Conditions
Parkinson's Disease, Dyskinesias, Movement Disorders
Interventions
Buspirone, Placebo
Drug
Lead sponsor
Oregon Health and Science University
Other
Eligibility
18 Years to 99 Years
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2021
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Mar 5, 2021 · Synced Oct 17, 2026, 6:50 PM EDT
Completed Phase 3 Interventional Results available

Open-Label Phase 3 Study to Examine the Long-Term Safety, Tolerability and Efficacy of APL-130277 for the Acute Treatment of "OFF" Episodes in Patients With Parkinson's Disease

NCT02542696
View directory record Official record
Conditions
Parkinson Disease
Interventions
APL-130277
Drug
Lead sponsor
Sumitomo Pharma America, Inc.
Industry
Eligibility
18 Years and older
Enrollment
496 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2022
U.S. locations
48
States / cities
Birmingham, Alabama • Phoenix, Arizona • Scottsdale, Arizona + 42 more
Source: ClinicalTrials.gov public record
Updated Nov 22, 2023 · Synced Oct 17, 2026, 6:50 PM EDT
Completed Phase 3 Interventional Results available

Study of Efficacy, Safety and Tolerability of Levodopa-Carbidopa Intestinal Gel in Levodopa-Responsive Parkinson's Subjects

NCT00357994
View directory record Official record
Conditions
Advanced Parkinson's Disease
Interventions
Levodopa carbidopa intestinal gel (LCIG), Placebo gel, Levodopa carbidopa (LC) oral encapsulated immediate release (IR) tablets, Placebo (PBO) oral capsules, 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
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
8
States / cities
Los Angeles, California • Englewood, Colorado • Washington D.C., District of Columbia + 5 more
Source: ClinicalTrials.gov public record
Updated Jan 16, 2015 · Synced Oct 17, 2026, 6:50 PM EDT
Completed Phase 2 Interventional

Open Label, Safety, Tolerability and Efficacy of AFQ056 in Parkinson's Patients With L-dopa Induced Dyskinesias

NCT01173731
View directory record Official record
Conditions
Parkinson Disease, Dyskinesia, Drug-Induced, Levodopa
Interventions
AFQ056
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
Not listed
Enrollment
66 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
3
States / cities
Sunnyvale, California • Englewood, Colorado • Indianapolis, Indiana
Source: ClinicalTrials.gov public record
Updated Dec 23, 2020 · Synced Oct 17, 2026, 6:50 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Medications for Stopping Cocaine Dependence and Preventing Relapse

NCT00218023
View directory record Official record
Conditions
Cocaine Abuse, Cocaine-Related Disorders
Interventions
Modafinil, Levodopa/Carbidopa, Naltrexone HCl, Placebo, Motivational Interviewing (MI), Contingency management (CM), Cognitive-Behavioral Therapy (CBT)
Drug · Behavioral
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
18 Years to 55 Years
Enrollment
101 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2012
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Jun 9, 2017 · Synced Oct 17, 2026, 6:50 PM EDT
Recruiting No phase listed Observational

Udall Project 2 Aim 2A&C

NCT05656586
View directory record Official record
Conditions
Parkinson Disease
Interventions
observational-- no intervention
Other
Lead sponsor
University of Minnesota
Other
Eligibility
Not listed
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2028
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Mar 3, 2026 · Synced Oct 17, 2026, 6:50 PM EDT
Completed Phase 2 Interventional

Riluzole to Treat Parkinson's Disease

NCT00013624
View directory record Official record
Conditions
Parkinson's Disease
Interventions
IV Levodopa
Drug
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
Not listed
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2005
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 4, 2008 · Synced Oct 17, 2026, 6:50 PM EDT
Completed Phase 2 Interventional

KW-6002 to Treat Parkinson's Disease

NCT00006337
View directory record Official record
Conditions
Parkinson's Disease
Interventions
KW-6002, IV Levodopa
Drug
Lead sponsor
National Institute of Neurological Disorders and Stroke (NINDS)
NIH
Eligibility
Not listed
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2000 – 2002
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 4, 2008 · Synced Oct 17, 2026, 6:50 PM EDT
Completed Phase 2 Interventional

A Study to Assess the PK and Pharmacodynamics of IPX203 in Patients With Advanced Parkinson's Disease

NCT02271503
View directory record Official record
Conditions
Parkinson's Disease
Interventions
CD-LD IR, IPX203 180 mg, IPX203 270 mg, Rytary 195 mg, Rytary 145 mg
Drug
Lead sponsor
Impax Laboratories, LLC
Industry
Eligibility
40 Years and older
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
11
States / cities
Phoenix, Arizona • Little Rock, Arkansas • Fountain Valley, California + 8 more
Source: ClinicalTrials.gov public record
Updated Nov 6, 2019 · Synced Oct 17, 2026, 6:50 PM EDT
Suspended Phase 2 Interventional

Randomized, Double-Blind, Active Placebo-Controlled Study of Ketamine to Treat Levodopa-Induced Dyskinesia

NCT04912115
View directory record Official record
Conditions
Dyskinesias, Movement Disorders, Central Nervous System Diseases, Nervous System Diseases, Neurologic Manifestations
Interventions
Ketamine, Midazolam
Drug
Lead sponsor
PharmaTher Inc.
Industry
Eligibility
30 Years to 85 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
7
States / cities
Tucson, Arizona • Chula Vista, California • Fountain Valley, California + 3 more
Source: ClinicalTrials.gov public record
Updated Nov 18, 2023 · Synced Oct 17, 2026, 6:50 PM EDT
Enrolling by invitation Early Phase 1 Interventional

Treating Early Stage Diabetic Retinopathy

NCT05132660
View directory record Official record
Conditions
Diabetic Retinopathy
Interventions
Sinemet CR, placebo
Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
30 Years to 80 Years
Enrollment
244 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2028
U.S. locations
1
States / cities
Decatur, Georgia
Source: ClinicalTrials.gov public record
Updated Apr 7, 2026 · Synced Oct 17, 2026, 6:50 PM EDT
Completed Phase 3 Interventional

A Multicenter, Open-label Trial to Assess Subject Preference of PARCOPA, Carbidopa/Levodopa Orally Disintegrating Tablets, Compared to Conventional Carbidopa/Levodopa Tablets in Subjects With Stable Parkinson's Disease

NCT00139867
View directory record Official record
Conditions
Parkinson's Disease
Interventions
PARCOPA
Drug
Lead sponsor
UCB Pharma
Industry
Eligibility
18 Years and older
Timeline
2004
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Oct 20, 2014 · Synced Oct 17, 2026, 6:50 PM EDT