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ClinicalTrials.gov public records Last synced Oct 19, 2026, 2:32 PM EDT

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Showing 1–24 of 199 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Placebo Control Form 1 Capsules Clear all
Completed Phase 4 Interventional Results available

Clinical Trial of Niagen to Examine Recovery in People With Persistent Cognitive and Physical Symptoms After COVID-19

NCT04809974
View directory record Official record
Conditions
Covid19, Sequelae of; Infection, Cognitive Symptom
Interventions
Niagen
Drug
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 65 Years
Enrollment
72 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2024
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 5, 2025 · Synced Oct 19, 2026, 2:32 PM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

Effect of Selenium Intervention on Inflammation in Older Adults

NCT01289925
View directory record Official record
Conditions
Inflammation
Interventions
Selenium, Sugar Pill Placebo
Dietary Supplement · Other
Lead sponsor
Johns Hopkins University
Other
Eligibility
70 Years to 110 Years
Enrollment
182 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006 – 2012
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Apr 9, 2018 · Synced Oct 19, 2026, 2:32 PM EDT
Completed Phase 1 Interventional

A Study to Determine the Safety and Efficacy of LX3305 in Subjects With Active Rheumatoid Arthritis

NCT01417052
View directory record Official record
Conditions
Rheumatoid Arthritis
Interventions
50 mg LX3305 QD, 100 mg LX3305 QD, 150 mg LX3305 QD, 200 mg LX3305 QD, 250 mg LX3305 QD, 300 mg LX3305 QD, 400 mg LX3305 QD, 250 mg LX3305 BID, 500 mg LX3305 QD, Placebo
Drug
Lead sponsor
Lexicon Pharmaceuticals
Industry
Eligibility
18 Years to 75 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Aug 2, 2012 · Synced Oct 19, 2026, 2:32 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Ranger Resilience and Improved Performance on Phospholipid Bound Omega-3's

NCT02908932
View directory record Official record
Conditions
Nutrition, Fatty Acids, Omega-3, Cognition, Resilience, Psychological, Psychology, Military
Interventions
Phospholipid-bound omega-3 supplement, Placebo supplement
Dietary Supplement
Lead sponsor
Medical University of South Carolina
Other
Eligibility
Not listed
Enrollment
555 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2018
U.S. locations
3
States / cities
Fort Benning, Georgia • Bethesda, Maryland • Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated Jul 5, 2018 · Synced Oct 19, 2026, 2:32 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Placebo-Controlled Single Dose Study to Evaluate Safety and Pharmacokinetics of SXC-2023 in Healthy Volunteers

NCT03301298
View directory record Official record
Conditions
Healthy
Interventions
SXC-2023, Placebo oral capsule
Drug
Lead sponsor
Promentis Pharmaceuticals, Inc.
Industry
Eligibility
18 Years to 55 Years
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2018
U.S. locations
1
States / cities
Tempe, Arizona
Source: ClinicalTrials.gov public record
Updated Sep 26, 2019 · Synced Oct 19, 2026, 2:32 PM EDT
Completed Phase 2 Interventional Results available

Effect of a Wide Spectrum Nutritional Supplement on Mitochondrial Function in Children With Autism Spectrum Disorder

NCT03835117
View directory record Official record
Conditions
Autism Spectrum Disorder
Interventions
Wide-spectrum nutritional supplement, Placebo
Drug · Other
Lead sponsor
Rossignol Medical Center
Other
Eligibility
2 Years to 17 Years
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Jun 30, 2026 · Synced Oct 19, 2026, 2:32 PM EDT
Withdrawn Phase 2 Interventional

Chronic Fatigue Syndrome: A Presumptive Mitochondrial Disorder

NCT01471652
View directory record Official record
Conditions
Chronic Fatigue Syndrome
Interventions
Nutraceutical supplements, Placebo
Drug
Lead sponsor
Columbia University
Other
Eligibility
25 Years to 55 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Apr 13, 2015 · Synced Oct 19, 2026, 2:32 PM EDT
Recruiting Phase 2 Interventional

Magnesium and Riboflavin Treatment for Post-Concussion Headache

NCT06260072
View directory record Official record
Conditions
Concussion, Intermediate
Interventions
magnesium and riboflavin supplement
Drug
Lead sponsor
University of Virginia
Other
Eligibility
18 Years to 40 Years
Enrollment
108 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2025
U.S. locations
1
States / cities
Charlottesville, Virginia
Source: ClinicalTrials.gov public record
Updated Mar 27, 2025 · Synced Oct 19, 2026, 2:32 PM EDT
Recruiting Phase 3 Interventional

Study of Tadalafil vs. Placebo for Improving Hemodynamics and End-Organ Dysfunction in Fontan Physiology

NCT05206955
View directory record Official record
Conditions
Fontan Palliation
Interventions
Tadalafil, Placebo
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Aug 13, 2026 · Synced Oct 19, 2026, 2:32 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Single-Dose Escalation Study Followed by a Multiple-Dose Escalation Study of SKL24741 in Healthy Subjects

NCT04505397
View directory record Official record
Conditions
Healthy
Interventions
SKL24741, Placebo
Drug
Lead sponsor
SK Life Science, Inc.
Industry
Eligibility
18 Years to 50 Years
Enrollment
111 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
West Bend, Wisconsin
Source: ClinicalTrials.gov public record
Updated Dec 21, 2023 · Synced Oct 19, 2026, 2:32 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

A Randomized Placebo Controlled Pilot Study of Probiotic Supplementation in At-risk Pregnant Women

NCT03646487
View directory record Official record
Conditions
Iron-deficiency, Pregnancy, High Risk, Stress, Psychological
Interventions
Probiotic LP299v 10x10 colony forming units in capsule form, Placebo in capsule form
Dietary Supplement · Other
Lead sponsor
University of Illinois at Chicago
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2020
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Apr 7, 2023 · Synced Oct 19, 2026, 2:32 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

The Impact of Ashwagandha on Perceived Stress, Sleep and Food Cravings in College Students

NCT05430685
View directory record Official record
Conditions
Stress, Sleep, Craving, Well Being
Interventions
Ashwagandha, Placebo
Dietary Supplement · Other
Lead sponsor
University of Colorado, Colorado Springs
Other
Eligibility
18 Years and older
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Colorado Springs, Colorado
Source: ClinicalTrials.gov public record
Updated Jun 24, 2022 · Synced Oct 19, 2026, 2:32 PM EDT
Active, not recruiting Phase 1 Interventional

Microbiota Transplant With Antibiotic Preconditioning and Fiber Supplementation in PAH.

NCT07751120
View directory record Official record
Conditions
Pulmonary Arterial Hypertension
Interventions
MTT with antibiotic preconditioning + fiber supplementation, MTT with antibiotic preconditioning + placebo supplementation, MTT with placebo + placebo supplementation.
Drug
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 75 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Sep 28, 2026 · Synced Oct 19, 2026, 2:32 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Study to Determine the Effect of Multiple Oral Doses of SLx-2119 in Healthy Male Subjects

NCT05918627
View directory record Official record
Conditions
Immune System Disorder (Healthy Volunteer)
Interventions
Belumosudil mesylate, Placebo
Drug
Lead sponsor
Kadmon, a Sanofi Company
Industry
Eligibility
18 Years to 55 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 26, 2023 · Synced Oct 19, 2026, 2:32 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Efficacy of a New Delivery System for Beta-hydroxy-beta-methylbutyrate

NCT01150526
View directory record Official record
Conditions
Healthy
Interventions
CaHMB, HMB Free Acid Gel, Placebo, Placebo Gel Dosage
Dietary Supplement
Lead sponsor
Metabolic Technologies Inc.
Industry
Eligibility
18 Years to 40 Years
Enrollment
41 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
1
States / cities
Ames, Iowa
Source: ClinicalTrials.gov public record
Updated Jul 18, 2012 · Synced Oct 19, 2026, 2:32 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Interaction Study of Clopidogrel 600/150 mg Given Alone or Concomitantly With Omeprazole 80 mg in Healthy Subjects

NCT01129414
View directory record Official record
Conditions
Healthy
Interventions
Clopidogrel, Placebo, Omeprazole
Drug
Lead sponsor
Sanofi
Industry
Eligibility
18 Years to 65 Years
Enrollment
72 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009
U.S. locations
1
States / cities
Bridgewater, New Jersey
Source: ClinicalTrials.gov public record
Updated Dec 15, 2011 · Synced Oct 19, 2026, 2:32 PM EDT
Completed Phase 3 Interventional Results available

Relapse-Prevention Study With Levomilnacipran ER (F2695 SR) in Patients With Major Depressive Disorder

NCT01085812
View directory record Official record
Conditions
Depression, Major Depressive Disorder
Interventions
Levomilnacipran ER, Placebo
Drug
Lead sponsor
Forest Laboratories
Industry
Eligibility
18 Years to 65 Years
Enrollment
734 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
30
States / cities
Beverly Hills, California • Encino, California • Garden Grove, California + 26 more
Source: ClinicalTrials.gov public record
Updated Jan 13, 2020 · Synced Oct 19, 2026, 2:32 PM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Bioavailability of EPA and DHA From Two Dietary Supplements

NCT01908374
View directory record Official record
Conditions
Hypertriglyceridemia
Interventions
DHA-rich fish oil versus Phospholipid-rich fish oil
Dietary Supplement
Lead sponsor
Arctic Nutrition AS
Industry
Eligibility
18 Years to 59 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
1
States / cities
Addison, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 25, 2013 · Synced Oct 19, 2026, 2:32 PM EDT
Completed Phase 4 Interventional Results available

Persistence of Effect and Safety of Valbenazine for the Treatment of Tardive Dyskinesia

NCT03891862
View directory record Official record
Conditions
Tardive Dyskinesia (TD)
Interventions
Valbenazine, Placebo oral capsule
Drug
Lead sponsor
Neurocrine Biosciences
Industry
Eligibility
18 Years to 85 Years
Enrollment
135 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2020
U.S. locations
42
States / cities
Little Rock, Arkansas • Anaheim, California • Costa Mesa, California + 35 more
Source: ClinicalTrials.gov public record
Updated Apr 20, 2021 · Synced Oct 19, 2026, 2:32 PM EDT
Completed Phase 2 Interventional

Probiotic (LGG) for Veterans With PTSD

NCT04150380
View directory record Official record
Conditions
Post Traumatic Stress Disorder, Inflammation
Interventions
Lactobacillus rhamnosus GG (LGG; ATCC strain 53103; CRMTS #11272; PTS #3766), Placebo
Biological · Other
Lead sponsor
VA Eastern Colorado Health Care System
Federal
Eligibility
18 Years to 60 Years
Enrollment
383 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2025
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Mar 24, 2026 · Synced Oct 19, 2026, 2:32 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Development of Agents to Diminish the Risk of Hypoglycemia-induced Brain Injury in Type 1 Diabetes

NCT03356457
View directory record Official record
Conditions
Hyperglycaemia (Diabetic)
Interventions
Dichloroacetate, Placebo oral capsule
Drug
Lead sponsor
Yale University
Other
Eligibility
18 Years to 65 Years
Enrollment
21 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Jan 22, 2021 · Synced Oct 19, 2026, 2:32 PM EDT
Completed Phase 3 Interventional

A Multicenter, Randomized, Double-Blind, Double-Dummy Trial of Azithromycin SR Compared With Levofloxacin for the Treatment of Mild to Moderate Pneumonia in Adult Patients

NCT00643734
View directory record Official record
Conditions
Pneumonia
Interventions
azithromycin sustained release, placebo, levofloxacin
Drug · Other
Lead sponsor
Pfizer
Industry
Eligibility
18 Years and older
Enrollment
468 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2004
U.S. locations
35
States / cities
Mesa, Arizona • Phoenix, Arizona • San Luis Obispo, California + 28 more
Source: ClinicalTrials.gov public record
Updated Mar 26, 2008 · Synced Oct 19, 2026, 2:32 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Nitrate and Vitamin C on Vascular Health Oxidative Stress

NCT04283630
View directory record Official record
Conditions
Endothelial Dysfunction
Interventions
Dietary nitrate in the form of beetroot juice for all participnats, Nature Made vitamin c 1000 mg, Placebo
Dietary Supplement
Lead sponsor
David Travis Thomas
Other
Eligibility
50 Years to 70 Years
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
2
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Feb 25, 2020 · Synced Oct 19, 2026, 2:32 PM EDT
Recruiting Phase 1 Interventional

Psilocybin as a Novel Therapy for Residual Anhedonia

NCT07607938
View directory record Official record
Conditions
Anhedonia, Emotional Blunting
Interventions
Psilocybin, Placebo
Drug
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 65 Years
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2030
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Sep 15, 2026 · Synced Oct 19, 2026, 2:32 PM EDT