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ClinicalTrials.gov public records Last synced Sep 29, 2026, 10:54 PM EDT

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Showing 1–24 of 35 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Conditions
Parkinson's Disease
Interventions
CVT-301, Sinemet
Drug
Lead sponsor
Acorda Therapeutics
Industry
Eligibility
30 Years to 85 Years
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019
U.S. locations
5
States / cities
Long Beach, California • Hallandale, Florida • Orlando, Florida + 2 more
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
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
11
States / cities
Birmingham, Alabama • Fountain Valley, California • Oceanside, California + 8 more
Completed Phase 2Phase 3 Interventional Results available

Augmenting Language Therapy for Aphasia: Levodopa

NCT01429077
Conditions
Nonfluent Aphasia, Stroke
Interventions
levodopa/carbidopa, Placebo comparator
Drug
Lead sponsor
Shirley Ryan AbilityLab
Other
Eligibility
21 Years and older
Enrollment
36 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2012
U.S. locations
1
States / cities
Chicago, Illinois
Conditions
Parkinson's Disease
Interventions
Carbidopa/levodopa/entacapone, Immediate release carbidopa/levodopa
Drug
Lead sponsor
Novartis
Industry
Eligibility
30 Years to 85 Years
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
21
States / cities
Phoenix, Arizona • Aliso Viejo, California • Irvine, California + 17 more
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Medications for Stopping Cocaine Dependence and Preventing Relapse

NCT00218023
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
Conditions
Spinal Cord Injuries
Interventions
CPH + hand training, CD-LD + hand training, ATX + hand training, Placebo + hand training
Drug
Lead sponsor
Bronx VA Medical Center
Federal
Eligibility
18 Years to 65 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
The Bronx, New York
Conditions
Parkinsonian Signs in Older Persons
Interventions
Carbidopa 25 mg, Carbidopa-Levodopa 25/100 mg
Drug
Lead sponsor
University of Michigan
Other
Eligibility
60 Years and older
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
2
States / cities
Ann Arbor, Michigan
Completed Phase 1 Interventional Accepts healthy volunteers

The Effect of Dopamine on Diabetic Retinopathy

NCT02706977
Conditions
Diabetes
Interventions
Low Dose Sinemet CR, High Dose Sinemet CR, RETeval Electroretinogram (ERG) Testing, Contrast Sensitivity Testing, Visual Acuity Testing
Drug · Device · Other
Lead sponsor
Emory University
Other
Eligibility
18 Years to 80 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
Atlanta, Georgia
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Striatal Effective Connectivity to Predict Treatment Response in Cocaine Misuse

NCT02080819
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
Conditions
Parkinson's Disease (Disorder)
Interventions
IR CD-LD, IPX203 ER CD-LD, Placebo Matching IPX203, Placebo Matching IR CD-LD
Drug · Other
Lead sponsor
Impax Laboratories, LLC
Industry
Eligibility
40 Years and older
Enrollment
630 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
56
States / cities
Phoenix, Arizona • Little Rock, Arkansas • Loma Linda, California + 46 more
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
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
Conditions
Idiopathic Parkinson's Disease
Interventions
IPX054 200 mg, IPX054 250 mg, CD-LD IR, CD-LD CR, IPX054 200 mg Placebo, IPX054 250 mg Placebo, CD-LD IR Placebo, CD-LD CR Placebo
Drug
Lead sponsor
Impax Laboratories, LLC
Industry
Eligibility
30 Years and older
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
2
States / cities
Bingham Farms, Michigan • Portland, Oregon
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
Completed Phase 2 Interventional Accepts healthy volunteers

Levodopa for Diabetic Retinopathy

NCT07444892
Conditions
Diabetic Retinopathy
Interventions
Levodopa, Placebo
Drug
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
230 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2025
U.S. locations
1
States / cities
Decatur, Georgia
Conditions
Parkinson's Disease With End of Dose Wearing Off
Interventions
Carbidopa/levodopa/entacapone
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
30 Years to 85 Years
Enrollment
359 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2008
U.S. locations
41
States / cities
Phoenix, Arizona • Fullerton, California • Irvine, California + 38 more
Conditions
Major Depressive Disorder, Dysthymia, Depression
Interventions
L-DOPA, Placebo Oral Tablet
Drug
Lead sponsor
New York State Psychiatric Institute
Other
Eligibility
60 Years and older
Enrollment
51 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
New York, New York
Conditions
Age-related Macular Degeneration
Interventions
carbidopa-levodopa 25-100 mg, placebo for carbidopa-levodopa 25-100 mg
Drug
Lead sponsor
Snyder, Robert W., M.D., Ph.D., P.C.
Individual
Eligibility
50 Years to 85 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
1
States / cities
Tucson, Arizona
Completed Phase 2 Interventional Results available

Dose Ranging Study of Carbidopa-levodopa

NCT03023059
Conditions
Age-related Macular Degeneration
Interventions
Carbidopa-Levodopa, 25 Mg-100 Mg Oral Tablet
Drug
Lead sponsor
Snyder, Robert W., M.D., Ph.D., P.C.
Individual
Eligibility
50 Years to 85 Years
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
1
States / cities
Tucson, Arizona
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
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
Completed Phase 2 Interventional Accepts healthy volunteers

Dopaminergic Dysfunction in Late-Life Depression

NCT04469959
Conditions
Late Life Depression, Cognitive Decline, Depressive Disorder, Treatment-Resistant, Levodopa, Gait Impairment
Interventions
L-Dopa, Placebo
Drug
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
60 Years and older
Enrollment
79 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2026
U.S. locations
2
States / cities
Pittsburgh, Pennsylvania • Nashville, Tennessee
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
Conditions
Parkinson's Disease
Interventions
IPX054 200 mg, CD-LD IR, IPX054 Placebo, CD-LD IR Placebo
Drug
Lead sponsor
Impax Laboratories, LLC
Industry
Eligibility
30 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2007
U.S. locations
2
States / cities
Chicago, Illinois • Charleston, South Carolina