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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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Filters: Condition: Dopamine Clear all
Completed Phase 1 Interventional

Pilot Study To Assess Effect of Treatment and Adherence in PD Subjects

NCT01788696
View directory record Official record
Conditions
Parkinson Disease
Interventions
Group A - Early Imaging, Group B - Delayed Imaging
Radiation
Lead sponsor
Duke University
Other
Eligibility
18 Years to 80 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
1
States / cities
Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 11, 2015 · Synced Sep 19, 2026, 4:53 AM EDT
Not yet recruiting Phase 4 Interventional

Broadening Antiemetics Research by Comparing the Effectiveness of Fosaprepitant and Metoclopramide

NCT06740812
View directory record Official record
Conditions
Nausea and Vomiting, Nausea, Vomiting
Interventions
Fosaprepitant for Injection, Metoclopramide Injection
Drug
Lead sponsor
Montefiore Medical Center
Other
Eligibility
18 Years and older
Enrollment
212 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Jun 28, 2026 · Synced Sep 19, 2026, 4:53 AM 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 19, 2026, 4:53 AM EDT
Completed Phase 2 Interventional Results available

Lexapro and Pramipexole and to Treat Major Depression

NCT00086307
View directory record Official record
Conditions
Major Depression
Interventions
Pramipexole, Escitalopram
Drug
Lead sponsor
National Institute of Mental Health (NIMH)
NIH
Eligibility
18 Years to 65 Years
Enrollment
39 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2010
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 27, 2013 · Synced Sep 19, 2026, 4:53 AM EDT
Recruiting Phase 2 Interventional

A Study of Pasireotide in People With Prolactinoma

NCT06295952
View directory record Official record
Conditions
Prolactin-Producing Pituitary Tumor
Interventions
Pasireotide, SF-36 and HADS
Drug · Other
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2027
U.S. locations
7
States / cities
Basking Ridge, New Jersey • Middletown, New Jersey • Montvale, New Jersey + 4 more
Source: ClinicalTrials.gov public record
Updated Mar 3, 2026 · Synced Sep 19, 2026, 4:53 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers

Study of Dopamine Transporter Receptor Occupancy With Long-acting Dex-methylphenidate

NCT00593138
View directory record Official record
Conditions
Drug Binding to DAT Receptors
Interventions
dex-methylphenidate
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 55 Years
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2009
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 21, 2013 · Synced Sep 19, 2026, 4:53 AM EDT
Completed Phase 2 Interventional

Clozapine for Treatment-Resistant Mania

NCT00029458
View directory record Official record
Conditions
Bipolar Disorder
Interventions
Clozapine
Drug
Lead sponsor
National Institute of Mental Health (NIMH)
NIH
Eligibility
Not listed
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2005
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Sep 19, 2026, 4:53 AM EDT
Completed No phase listed Observational

Dopamine Function in Developmental Stuttering

NCT00024960
View directory record Official record
Conditions
Developmental Stuttering
Interventions
Not listed
Lead sponsor
National Institute on Deafness and Other Communication Disorders (NIDCD)
NIH
Eligibility
18 Years to 55 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2010
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Jul 1, 2017 · Synced Sep 19, 2026, 4:53 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Brain Dopamine Function in Adults With ADHD

NCT00580814
View directory record Official record
Conditions
Attention Deficit Hyperactivity Disorder
Interventions
Experimental: methylphenidate treatment
Drug
Lead sponsor
University of California, Irvine
Other
Eligibility
18 Years to 45 Years
Enrollment
75 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2009
U.S. locations
1
States / cities
Irvine, California
Source: ClinicalTrials.gov public record
Updated Aug 28, 2024 · Synced Sep 19, 2026, 4:53 AM EDT
Completed Not applicable Interventional

Exogenous Effects of Standard Medical Care (Dopamine) on Motor Learning of an Upper Limb Task in Parkinson Disease

NCT02600858
View directory record Official record
Conditions
Parkinson Disease
Interventions
Upper limb feeding training
Behavioral
Lead sponsor
University of Utah
Other
Eligibility
50 Years to 80 Years
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Feb 21, 2018 · Synced Sep 19, 2026, 4:53 AM EDT
Completed Phase 1 Interventional

Early Blood Pressure Management in Extremely Premature Infants

NCT00874393
View directory record Official record
Conditions
Infant, Newborn, Infant, Low Birth Weight, Infant, Small for Gestational Age, Infant, Premature, Hypotension, Blood Pressure
Interventions
Dopamine, Hydrocortisone, Infusion Placebo, Syringe Placebo
Drug
Lead sponsor
NICHD Neonatal Research Network
Network
Eligibility
Up to 24 Hours
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
17
States / cities
Birmingham, Alabama • Palo Alto, California • New Haven, Connecticut + 13 more
Source: ClinicalTrials.gov public record
Updated May 24, 2017 · Synced Sep 19, 2026, 4:53 AM EDT
Terminated Phase 4 Interventional

Dopamine in Acute Decompensated Heart Failure II

NCT01060293
View directory record Official record
Conditions
Acute Decompensated Heart Failure
Interventions
High-dose furosemide, Low-dose furosemide, Low-dose furosemide combined with low-dose dopamine
Drug
Lead sponsor
Larissa University Hospital
Other
Eligibility
18 Years and older
Enrollment
161 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
2
States / cities
Atlanta, Georgia • Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Sep 10, 2013 · Synced Sep 19, 2026, 4:53 AM EDT
Completed No phase listed Observational

Genetic Factors Related to Stuttering

NCT00001602
View directory record Official record
Conditions
Stuttering
Interventions
Not listed
Lead sponsor
National Institute on Deafness and Other Communication Disorders (NIDCD)
NIH
Eligibility
Not listed
Enrollment
500 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1996 – 2005
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 3, 2008 · Synced Sep 19, 2026, 4:53 AM EDT
Completed Phase 2 Interventional Results available

Apathy in Dementia Methylphenidate Trial (ADMET)

NCT01117181
View directory record Official record
Conditions
Apathy, Alzheimer's Disease
Interventions
Methylphenidate, placebo, Psychosocial intervention
Drug · Other
Lead sponsor
Johns Hopkins Bloomberg School of Public Health
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
2
States / cities
Baltimore, Maryland • Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Jun 11, 2018 · Synced Sep 19, 2026, 4:53 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

ALTROPANE® SPECT Imaging in Patients With Parkinson Disease

NCT00397228
View directory record Official record
Conditions
Parkinson Disease
Interventions
ALTROPANE®
Drug
Lead sponsor
Molecular NeuroImaging
Other
Eligibility
30 Years and older
Enrollment
27 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2011
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Dec 15, 2016 · Synced Sep 19, 2026, 4:53 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Decision Making Study in Young and Middle-Aged Adults: Part II

NCT03512171
View directory record Official record
Conditions
Healthy Adults
Interventions
Dextroamphetamine, Placebo, [18F]Fallypride, [18F]-FE-PE2I
Drug · Diagnostic Test
Lead sponsor
Vanderbilt University
Other
Eligibility
20 Years to 65 Years
Enrollment
65 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jun 26, 2019 · Synced Sep 19, 2026, 4:53 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Dopaminergic Mechanisms Underlying Human Social Behavior

NCT04205994
View directory record Official record
Conditions
Decision Making, Executive Function, Dopamine
Interventions
Tolcapone 200 MG, Functional Magnetic Resonance Imaging (fMRI)
Drug · Other
Lead sponsor
University of California, Berkeley
Other
Eligibility
18 Years to 40 Years
Enrollment
70 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
1
States / cities
Berkeley, California
Source: ClinicalTrials.gov public record
Updated May 15, 2024 · Synced Sep 19, 2026, 4:53 AM EDT
Completed No phase listed Observational

The Study of the Impact of Disclosing Imaging Study Information to Trial Participants

NCT00354003
View directory record Official record
Conditions
Parkinsonian Syndrome, Parkinson
Interventions
A series of questionnaires
Behavioral
Lead sponsor
Institute for Neurodegenerative Disorders
Other
Eligibility
21 Years and older
Enrollment
800 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Apr 2, 2019 · Synced Sep 19, 2026, 4:53 AM EDT
Completed Phase 2 Interventional

Effectiveness of Lobeline in Treating Symptoms of ADHD in Adult Patients

NCT00664703
View directory record Official record
Conditions
Attention Deficit Disorder With Hyperactivity
Interventions
Lobeline sulfate, Methylphenidate HCl, Placebo
Drug
Lead sponsor
Yaupon Therapeutics
Industry
Eligibility
21 Years to 45 Years
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Jun 19, 2013 · Synced Sep 19, 2026, 4:53 AM EDT
Completed Phase 4 Interventional

Treatment of Obsessive-Compulsive Disorder

NCT00000373
View directory record Official record
Conditions
Obsessive-Compulsive Disorder
Interventions
olanzapine + fluoxetine, placebo + fluoxetine
Drug
Lead sponsor
University of Florida
Other
Eligibility
14 Years to 70 Years
Enrollment
74 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1992 – 2003
U.S. locations
2
States / cities
Gainesville, Florida • Jacksonville, Florida
Source: ClinicalTrials.gov public record
Updated Nov 26, 2013 · Synced Sep 19, 2026, 4:53 AM EDT
Completed Phase 2 Interventional

A Study to Evaluate the Efficacy and Safety of CIN-102 (Deudomperidone) in Adult Subjects With Idiopathic Gastroparesis.

NCT06899217
View directory record Official record
Conditions
Idiopathic Gastroparesis
Interventions
CIN-102 Dose 15mg, Placebo, CIN-102 Dose 10mg
Drug
Lead sponsor
CinDome Pharma, Inc.
Industry
Eligibility
18 Years and older
Enrollment
416 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
85
States / cities
Birmingham, Alabama • Foley, Alabama • Saraland, Alabama + 78 more
Source: ClinicalTrials.gov public record
Updated Jul 12, 2026 · Synced Sep 19, 2026, 4:53 AM EDT
Completed Phase 4 Interventional Results available

Inflammation-related Alterations in Neurocircuitry: Reversal With Levodopa

NCT02513485
View directory record Official record
Conditions
Depression
Interventions
Levodopa+carbidopa, Placebo
Drug
Lead sponsor
Emory University
Other
Eligibility
18 Years to 65 Years
Enrollment
57 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2020
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Sep 18, 2022 · Synced Sep 19, 2026, 4:53 AM 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 19, 2016 · Synced Sep 19, 2026, 4:53 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Cocaine Use Disorder and Cortical Dopamine

NCT03349606
View directory record Official record
Conditions
Cocaine Dependence
Interventions
d-amphetamine, [C-11]FLB 457
Drug · Radiation
Lead sponsor
University of Pittsburgh
Other
Eligibility
18 Years to 40 Years
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2020
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 3, 2020 · Synced Sep 19, 2026, 4:53 AM EDT