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Showing 1–24 of 2,159 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: placebo pills Clear all
Recruiting Not applicable Interventional Accepts healthy volunteers

The Effects of an Acute Dose of a Betalain-rich Concentrate on Repeated-sprint Cycling Performance and Recovery.

NCT06274385
View directory record Official record
Conditions
Nutraceuticals
Interventions
Betalain-rich concentrate (AltRed), Placebo
Dietary Supplement · Other
Lead sponsor
Drexel University
Other
Eligibility
18 Years to 40 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Nov 21, 2024 · Synced Sep 10, 2026, 4:32 PM EDT
Completed No phase listed Observational Accepts healthy volunteers

Food Reward in Native American Women

NCT01623440
View directory record Official record
Conditions
Obesity
Interventions
Placebo and fMRI, Naltrexone and fMRI
Combination Product
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
69 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2015
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jul 11, 2019 · Synced Sep 10, 2026, 4:32 PM EDT
Withdrawn Phase 2 Interventional

RCT of Goal-directed Iron Supplementation of Anemic, Critically Ill Trauma Patients, With and Without Oxandrolone

NCT02047552
View directory record Official record
Conditions
Functional Iron Deficiency, Trauma, Anemia
Interventions
Iron sucrose, Oxandrolone, IV iron placebo, Oxandrolone placebo
Drug
Lead sponsor
Denver Health and Hospital Authority
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Apr 2, 2019 · Synced Sep 10, 2026, 4:32 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Memory Reconsolidation Blockade as a Novel Intervention for Nicotine Dependence

NCT00916721
View directory record Official record
Conditions
Smoking Cessation
Interventions
Propranolol, Placebo
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 65 Years
Enrollment
113 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2011
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Sep 18, 2014 · Synced Sep 10, 2026, 4:32 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Chronic Kidney Disease (CKD) Platelet Study

NCT03649711
View directory record Official record
Conditions
Chronic Kidney Diseases, Heart Attack, Stroke, Ischemic
Interventions
Ticagrelor 90mg, Clopidogrel 75mg, Aspirin 81 mg
Drug
Lead sponsor
University of Arkansas
Other
Eligibility
18 Years to 91 Years
Enrollment
76 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2021
U.S. locations
2
States / cities
Little Rock, Arkansas
Source: ClinicalTrials.gov public record
Updated Dec 28, 2022 · Synced Sep 10, 2026, 4:32 PM EDT
Withdrawn Phase 2 Interventional

Anti-psychotic Medication (New Use) Weight Loss Study

NCT01272752
View directory record Official record
Conditions
Obesity
Interventions
IHBG-10, Placebo
Dietary Supplement
Lead sponsor
Avera McKennan Hospital & University Health Center
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013
U.S. locations
1
States / cities
Sioux Falls, South Dakota
Source: ClinicalTrials.gov public record
Updated May 31, 2012 · Synced Sep 10, 2026, 4:32 PM EDT
Active, not recruiting Phase 1 Interventional

Vagal Stimulation in POTS

NCT03124355
View directory record Official record
Conditions
Postural Tachycardia Syndrome
Interventions
placebo sugar pill, Pyridostigmine Pill, Galantamine Pill, Vagal stimulation, Sham vagal stimulation
Drug · Device
Lead sponsor
Vanderbilt University Medical Center
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2027
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Jul 12, 2026 · Synced Sep 10, 2026, 4:32 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effects of Shroom Tech Sport Supplementation and Concurrent Training

NCT02383017
View directory record Official record
Conditions
Body Composition, Performance Measures, Hormone Profiles, Blood Lipid Profiles
Interventions
Shroom Tech Sport, Placebo
Dietary Supplement
Lead sponsor
Florida State University
Other
Eligibility
18 Years to 30 Years · Male only
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2016
U.S. locations
1
States / cities
Tallahassee, Florida
Source: ClinicalTrials.gov public record
Updated Dec 16, 2020 · Synced Sep 10, 2026, 4:32 PM EDT
Terminated Phase 2 Interventional Results available

Trial of Lovaza in Adolescents With Mild to Moderately Elevated Triglycerides

NCT00672633
View directory record Official record
Conditions
Hypertriglyceridemia
Interventions
Lovaza, Placebo
Drug
Lead sponsor
Boston Children's Hospital
Other
Eligibility
10 Years to 19 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2012
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 28, 2013 · Synced Sep 10, 2026, 4:32 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Aging Program Project Grant 6

NCT03490825
View directory record Official record
Conditions
Improving Cardiometabolic Outcomes in Older Adults
Interventions
Melatonin 1 mg, Placebos, Meal timing, Non-Meal timing
Dietary Supplement · Other
Lead sponsor
Northwestern University
Other
Eligibility
55 Years to 75 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2024
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 22, 2025 · Synced Sep 10, 2026, 4:32 PM EDT
Completed Phase 1 Interventional

Treatment of Supine Hypertension in Autonomic Failure

NCT00223717
View directory record Official record
Conditions
Hypertension
Interventions
Clonidine, Nitroglycerin transdermal, Dipyridamole/ Aspirin (Aggrenox), Desmopressin (DDAVP), Sildenafil, Nifedipine, Hydralazine, Hydrochlorothiazide, Placebo, Bosentan, Diltiazem, Eplerenone, guanfacine, L-arginine, captopril, carbidopa, losartan, metoprolol tartrate, nebivolol hydrochloride, prazosin hydrochloride, tamsulosin hydrochloride, Head-up tilt., aliskiren, Local heat stress
Drug · Dietary Supplement · Other
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years to 80 Years
Enrollment
152 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2017
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 12, 2017 · Synced Sep 10, 2026, 4:32 PM EDT
Terminated Not applicable Interventional

Ambrisentan for the Improvement in Right Ventricular Strain in Scleroderma Associated Pulmonary Arterial Hypertension

NCT02169752
View directory record Official record
Conditions
Pre-Pulmonary Atrial Hypertension
Interventions
Ambrisentan
Drug
Lead sponsor
National Jewish Health
Other
Eligibility
18 Years to 80 Years
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2017
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Jan 18, 2021 · Synced Sep 10, 2026, 4:32 PM EDT
Recruiting Phase 1 Interventional

Mitigating the Pro-inflammatory Phenotype of Obesity

NCT04934228
View directory record Official record
Conditions
Blood Pressure, Diabetes, Obesity, Insulin Resistance, Diuretics Drug Reactions, Sympathetic Nerve Activity
Interventions
Hydrochlorothiazide 12.5Mg Tab, Clonidine Pill, Placebo
Drug
Lead sponsor
University of Kansas Medical Center
Other
Eligibility
18 Years to 79 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated Jun 4, 2025 · Synced Sep 10, 2026, 4:32 PM EDT
Withdrawn Phase 2 Interventional

Tenofovir Alafenamide for Treatment of Symptoms and Neuroprotection in Relapsing Remitting Multiple Sclerosis

NCT04880577
View directory record Official record
Conditions
Multiple Sclerosis, Relapsing-Remitting, Fatigue
Interventions
TENOFOVIR ALAFENAMIDE FUMARATE 25 Mg ORAL TABLET [VEMLIDY], Placebo
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2025
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Nov 14, 2022 · Synced Sep 10, 2026, 4:32 PM EDT
Completed Phase 4 Interventional Results available

A Pilot Study of Mirabegron and Behavioral Modification Including Pelvic Floor Exercise for Overactive Bladder in Parkinson's Disease (MAESTRO)

NCT02092181
View directory record Official record
Conditions
Parkinsons Disease
Interventions
Mirabegron, Placebo
Drug
Lead sponsor
Daniel Burdick, MD
Individual
Eligibility
30 Years to 85 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
1
States / cities
Kirkland, Washington
Source: ClinicalTrials.gov public record
Updated Aug 15, 2021 · Synced Sep 10, 2026, 4:32 PM EDT
Completed Phase 4 Interventional Results available

Oral Steroids Before Pulmonary Vein Isolation to Improve Outcomes

NCT01206452
View directory record Official record
Conditions
Atrial Fibrillation
Interventions
Prednisone, Placebo, Ablation Procedure
Drug · Other · Procedure
Lead sponsor
Dhanunjaya Lakkireddy, MD, FACC
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2013
U.S. locations
1
States / cities
Kansas City, Kansas
Source: ClinicalTrials.gov public record
Updated May 16, 2017 · Synced Sep 10, 2026, 4:32 PM EDT
Terminated Phase 3 Interventional

Memantine for the Treatment of Social Deficits in Youth With Disorders of Impaired Social Interactions

NCT03553875
View directory record Official record
Conditions
Autism, Autism Spectrum Disorder, Nonverbal Learning Disability
Interventions
Memantine Hydrochloride, Placebo
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
8 Years to 18 Years
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2025
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Feb 24, 2026 · Synced Sep 10, 2026, 4:32 PM EDT
Completed Phase 3 Interventional Results available

Effectiveness of Paricalcitol in Reducing Parathyroid Hormone (PTH) Levels in X-linked Hypophosphatemic Rickets

NCT00417612
View directory record Official record
Conditions
Hypophosphatemia, Familial, Hyperparathyroidism
Interventions
Paricalcitol, Placebo
Drug · Other
Lead sponsor
Yale University
Other
Eligibility
9 Years and older
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2012
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Mar 16, 2020 · Synced Sep 10, 2026, 4:32 PM EDT
Not yet recruiting Phase 2 Interventional Accepts healthy volunteers

Trial of the Combination of Alpha-Lipoic Acid and Mirabegron in Women and in Men With Obesity

NCT05713799
View directory record Official record
Conditions
Insulin Resistance, Obesity
Interventions
Alpha-lipoic acid, Mirabegron, Placebo
Drug
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
18 Years to 65 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2030
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 9, 2026 · Synced Sep 10, 2026, 4:32 PM EDT
Terminated Phase 3 Interventional Results available

Prevention of Cystic Fibrosis Diabetes

NCT00967798
View directory record Official record
Conditions
Cystic Fibrosis, Prediabetes
Interventions
Sitagliptin
Drug
Lead sponsor
Emory University
Other
Eligibility
13 Years and older
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2017
U.S. locations
3
States / cities
Atlanta, Georgia • Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Jun 24, 2018 · Synced Sep 10, 2026, 4:32 PM EDT
Completed Phase 2 Interventional Results available

Ketamine Plus Lithium in Treatment-Resistant Depression

NCT01880593
View directory record Official record
Conditions
Depression
Interventions
Lithium, Ketamine, Placebo
Drug
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
21 Years to 65 Years
Enrollment
34 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2016
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jul 30, 2018 · Synced Sep 10, 2026, 4:32 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers Results available

Dose Timing of D-Cycloserine to Augment CBT for Social Anxiety Disorder

NCT02066792
View directory record Official record
Conditions
Social Anxiety Disorder
Interventions
D-Cycloserine, Placebo, Cognitive Behavioral Therapy
Drug · Behavioral
Lead sponsor
Jasper A. Smits
Other
Eligibility
18 Years to 70 Years
Enrollment
152 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2018
U.S. locations
3
States / cities
Chicago, Illinois • Boston, Massachusetts • Austin, Texas
Source: ClinicalTrials.gov public record
Updated Jun 14, 2026 · Synced Sep 10, 2026, 4:32 PM EDT
Terminated Phase 4 Interventional Results available

Quetiapine XR for Cognitive and Functional Disability in Clinically Stable Patients With Bipolar Disorder

NCT00746421
View directory record Official record
Conditions
Bipolar Disorder, Cognitive Impairment
Interventions
Quetiapine XR, Placebo
Drug
Lead sponsor
Emory University
Other
Eligibility
18 Years to 65 Years
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
2
States / cities
Atlanta, Georgia • Durham, North Carolina
Source: ClinicalTrials.gov public record
Updated Apr 16, 2014 · Synced Sep 10, 2026, 4:32 PM EDT
Completed Phase 1 Interventional

Combining Medications for the Treatment of Alcohol Dependence: An Inpatient Preliminary Study

NCT00769158
View directory record Official record
Conditions
Alcoholism
Interventions
Topiramate and Naltrexone, Placebo
Drug · Other
Lead sponsor
Bankole Johnson
Other
Eligibility
21 Years to 45 Years
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
2
States / cities
Charlottesville, Virginia • Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Feb 6, 2012 · Synced Sep 10, 2026, 4:32 PM EDT