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Showing 1–24 of 110 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: PARCOPA Clear all
Completed Phase 2 Interventional Results available

A Clinical Study of Efficacy, Safety, Tolerability and PK of ND0612H in Subjects With Advanced Parkinson's Disease

NCT02577523
View directory record Official record
Conditions
Parkinson's Disease
Interventions
ND0612 (Levodopa/Carbidopa solution), ND0612 (Levodopa/Carbidopa solution) + morning oral IR-LD/CD
Drug
Lead sponsor
NeuroDerm Ltd.
Industry
Eligibility
30 Years to 80 Years
Enrollment
38 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
3
States / cities
Chicago, Illinois • Farmington Hills, Michigan • Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated May 24, 2023 · Synced Sep 4, 2026, 12:57 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 15, 2015 · Synced Sep 4, 2026, 12:57 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 19, 2014 · Synced Sep 4, 2026, 12:57 PM EDT
Completed Phase 1Phase 2 Interventional Results available

Neurobiological Drivers of Mobility Resilience: The Dopaminergic System

NCT04325503
View directory record Official record
Conditions
Parkinsonian Signs in Older Persons
Interventions
carbidopa
Drug
Lead sponsor
University of Michigan
Other
Eligibility
60 Years and older
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Apr 3, 2024 · Synced Sep 4, 2026, 12:57 PM EDT
Completed Phase 3 Interventional Results available

Study Comparing Continuous Subcutaneous Infusion Of ABBV-951 With Oral Carbidopa/Levodopa Tablets For Treatment Of Motor Fluctuations In Adult Participants With Advanced Parkinson's Disease

NCT04380142
View directory record Official record
Conditions
Parkinson's Disease (PD)
Interventions
ABBV-951, Placebo for Levodopa/Carbidopa (LD/CD), Levodopa/Carbidopa (LD/CD), Placebo for ABBV-951
Drug
Lead sponsor
AbbVie
Industry
Eligibility
30 Years and older
Enrollment
174 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
70
States / cities
Birmingham, Alabama • Mobile, Alabama • Phoenix, Arizona + 62 more
Source: ClinicalTrials.gov public record
Updated Nov 17, 2022 · Synced Sep 4, 2026, 12:57 PM EDT
Completed Phase 2Phase 3 Interventional Results available

A Trial of Levodopa in Angelman Syndrome

NCT01281475
View directory record Official record
Conditions
Angelman Syndrome
Interventions
Levodopa, Placebo Oral Capsule
Drug
Lead sponsor
Wen-Hann Tan
Other
Eligibility
4 Years to 12 Years
Enrollment
67 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
7
States / cities
San Diego, California • San Francisco, California • Boston, Massachusetts + 4 more
Source: ClinicalTrials.gov public record
Updated Jul 14, 2020 · Synced Sep 4, 2026, 12:57 PM EDT
Completed Phase 3 Interventional Results available

A Study to Examine the Effect of Levodopa-Carbidopa Intestinal Gel (LCIG) Therapy Relative to That of Optimized Medical Treatment (OMT) on Non-motor Symptoms (NMS) Associated With Advanced Parkinson's Disease (PD)

NCT02549092
View directory record Official record
Conditions
Advanced Parkinson's Disease
Interventions
Optimized Medical Treatment, Levodopa-Carbidopa Intestinal Gel, Nasojejunal (NJ) tube, Percutaneous endoscopic gastrostomy with a jejunal (PEG-J) tube
Drug · Device
Lead sponsor
AbbVie
Industry
Eligibility
30 Years and older
Enrollment
89 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2022
U.S. locations
8
States / cities
Fountain Valley, California • Boca Raton, Florida • Jacksonville, Florida + 5 more
Source: ClinicalTrials.gov public record
Updated Nov 27, 2023 · Synced Sep 4, 2026, 12:57 PM EDT
Completed Phase 2 Interventional Results available

Carbidopa/Levodopa Combined With Behavioral Therapy for the Treatment of Cocaine Dependence

NCT00713583
View directory record Official record
Conditions
Cocaine Dependence
Interventions
levodopa, Placebo, Cognitive Behavioral Therapy, Contingency Management
Drug · Behavioral
Lead sponsor
The University of Texas Health Science Center, Houston
Other
Eligibility
18 Years to 60 Years
Enrollment
85 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2011
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Apr 22, 2018 · Synced Sep 4, 2026, 12:57 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 5, 2019 · Synced Sep 4, 2026, 12:57 PM EDT
Terminated Phase 4 Interventional Results available

Levodopa and Exercise for Older Adults With Depression and Psychomotor Slowing

NCT04650217
View directory record Official record
Conditions
Depressive Disorder
Interventions
Carbidopa/levodopa, Placebo, Exercise training, Control
Drug · Behavioral
Lead sponsor
New York State Psychiatric Institute
Other
Eligibility
60 Years to 100 Years
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 1, 2023 · Synced Sep 4, 2026, 12:57 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Study to Compare Two Dose Strengths of CVT-301 (Levodopa Inhalation Powder) With an Oral Dose of Sinemet® (Carbidopa-levodopa) Tablets

NCT02812394
View directory record Official record
Conditions
Parkinson Disease
Interventions
CVT-301 (Dose Level 1), CVT-301 (Dose Level 2), Sinemet®
Drug
Lead sponsor
Acorda Therapeutics
Industry
Eligibility
25 Years to 65 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Oct 25, 2016 · Synced Sep 4, 2026, 12:57 PM EDT
Completed Phase 2 Interventional

12-Week, Double-Blind, Placebo-Controlled Study of 20 and 60 mg/Day Istradefylline in Parkinson's Disease Patients on Levodopa/Carbodopa

NCT00456794
View directory record Official record
Conditions
Parkinson's Disease
Interventions
Istradefylline (KW-6002)
Drug
Lead sponsor
Kyowa Kirin, Inc.
Industry
Eligibility
30 Years and older
Enrollment
325 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2003
U.S. locations
1
States / cities
Princeton, New Jersey
Source: ClinicalTrials.gov public record
Updated Apr 24, 2024 · Synced Sep 4, 2026, 12:57 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 24, 2024 · Synced Sep 4, 2026, 12:57 PM EDT
Terminated Phase 4 Interventional Accepts healthy volunteers Results available

1/2-Dopaminergic Dysfunction in Late-Life Depression (The D3 Study)

NCT04493320
View directory record Official record
Conditions
Depression, Cognitive Impairment, Gait Impairment
Interventions
Carbidopa/levodopa, Placebo
Drug
Lead sponsor
New York State Psychiatric Institute
Other
Eligibility
60 Years and older
Enrollment
5 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated May 21, 2023 · Synced Sep 4, 2026, 12:57 PM EDT
Completed Phase 4 Interventional Results available

DTA (Dopaminergic Therapy for Anhedonia) Study

NCT04723147
View directory record Official record
Conditions
Depression, Anhedonia
Interventions
Carbidopa Levodopa, Placebo
Drug
Lead sponsor
Emory University
Other
Eligibility
25 Years to 55 Years
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Dec 15, 2024 · Synced Sep 4, 2026, 12:57 PM EDT
Completed Not applicable Interventional Results available

PharmacoMRI of Parkinson Disease

NCT01528592
View directory record Official record
Conditions
Parkinson's Disease
Interventions
Carbidopa-Levodopa
Drug
Lead sponsor
Northwestern University
Other
Eligibility
30 Years and older
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 2, 2018 · Synced Sep 4, 2026, 12:57 PM EDT
Completed Phase 1 Interventional

Measuring Parkinson's Disease Progression

NCT03205956
View directory record Official record
Conditions
Parkinson's Disease
Interventions
Levodopa
Drug
Lead sponsor
Kevin J. Black, MD
Other
Eligibility
40 Years to 79 Years
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Oct 13, 2022 · Synced Sep 4, 2026, 12:57 PM EDT
Withdrawn Phase 4 Interventional

Combining Robotic-Assisted Therapy and Pharmacotherapy in Post-Stroke Rehabilitation

NCT02346630
View directory record Official record
Conditions
Stroke
Interventions
Placebo, Levodopa / Carbidopa, Armeo
Drug · Device
Lead sponsor
Ross D. Zafonte, MD
Other
Eligibility
18 Years to 85 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Charlestown, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 26, 2021 · Synced Sep 4, 2026, 12:57 PM EDT
Completed Phase 1 Interventional Results available

Study on Tolerability of Levodopa/Carbidopa in Children With Angelman Syndrome

NCT00829439
View directory record Official record
Conditions
Angelman Syndrome
Interventions
Levodopa/Carbidopa (4:1)
Drug
Lead sponsor
Boston Children's Hospital
Other
Eligibility
4 Years to 12 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 20, 2016 · Synced Sep 4, 2026, 12:57 PM EDT
Completed Phase 3 Interventional Results available

Safety/Efficacy Study of Levodopa-Carbidopa Intestinal Gel in Parkinson's Subjects

NCT00360568
View directory record Official record
Conditions
Dyskinesias, Parkinson's Disease, Severe Motor Fluctuations
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
62 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2012
U.S. locations
16
States / cities
Birmingham, Alabama • Fountain Valley, California • Los Angeles, California + 13 more
Source: ClinicalTrials.gov public record
Updated Jan 15, 2015 · Synced Sep 4, 2026, 12:57 PM EDT
Completed Phase 3 Interventional Results available

A Study To Evaluate The Safety And Efficacy Of IPX066 In Advanced Parkinson's Disease (ADVANCE-PD).

NCT00974974
View directory record Official record
Conditions
Parkinson's Disease
Interventions
IPX066, IR CD-LD
Drug
Lead sponsor
Impax Laboratories, LLC
Industry
Eligibility
30 Years and older
Enrollment
471 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
35
States / cities
Birmingham, Alabama • Phoenix, Arizona • Little Rock, Arkansas + 30 more
Source: ClinicalTrials.gov public record
Updated Aug 10, 2020 · Synced Sep 4, 2026, 12:57 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Striatal Effective Connectivity to Predict Treatment Response in Cocaine Misuse

NCT02080819
View directory record Official record
Conditions
Cocaine Dependence
Interventions
levodopa/carbidopa 400/100 BID
Drug
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
18 Years to 50 Years
Enrollment
131 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2017
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Apr 11, 2018 · Synced Sep 4, 2026, 12:57 PM EDT
Completed Phase 1 Interventional

Treatment of Orthostatic Hypotension in Autonomic Failure

NCT00223691
View directory record Official record
Conditions
Autonomic Failure, Orthostatic Hypotension
Interventions
Atomoxetine, Acarbose, Pyridostigmine Bromide, Yohimbine, Midodrine HCl, placebo, Modafinil, Octreotide, water intake, Diphenhydramine Hydrochloride, Ranitidine HCL, Tranylcypromine, Ergotamine/ Caffeine, Celecoxib, Pseudoephedrine, Methylphenidate, Indomethacin, Ibuprofen, Oxymetazoline 0.05% nasal solution, Bovril, Acetazolamide, Rivastigmine tartrate, Carbidopa/levodopa, Inflatable abdominal binder, inflatable abdominal binder (sham)
Drug · Other · Dietary Supplement + 1 more
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years to 85 Years
Enrollment
389 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2017
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jan 17, 2017 · Synced Sep 4, 2026, 12:57 PM EDT
Completed Phase 2Phase 3 Interventional

A Long-Term, Safety Study With a Flexible Dose Range of KW-6002 in Patients With Motor Response Complications on Levodopa/Carbidopa Therapy

NCT00955045
View directory record Official record
Conditions
Parkinson's Disease
Interventions
istradefylline
Drug
Lead sponsor
Kyowa Kirin, Inc.
Industry
Eligibility
30 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2003
U.S. locations
1
States / cities
Princeton, New Jersey
Source: ClinicalTrials.gov public record
Updated Apr 24, 2024 · Synced Sep 4, 2026, 12:57 PM EDT