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Showing 1–24 of 448 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Placebo sugar capsules Clear all
Completed Not applicable Interventional Accepts healthy volunteers Results available

Effects of Oral Probiotic Supplementation on Group B Strep (GBS) Rectovaginal Colonization in Pregnancy

NCT01479478
View directory record Official record
Conditions
Infection, Pregnancy
Interventions
Placebo, Probiotic dietary supplement
Drug · Dietary Supplement
Lead sponsor
Stanford University
Other
Eligibility
18 Years to 55 Years · Female only
Enrollment
251 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2017
U.S. locations
3
States / cities
Aptos, California • Santa Cruz, California • Stanford, California
Source: ClinicalTrials.gov public record
Updated Aug 19, 2018 · Synced Sep 14, 2026, 7:32 PM EDT
Completed Phase 4 Interventional Results available

Effect of Perimenstrual Ovarian Steroid Supplementation on Perimenstrual Suicidality

NCT03720847
View directory record Official record
Conditions
Suicidal Ideation
Interventions
Estradiol Transdermal Patch 0.1 mg/24 hrs, Oral Micronized Progesterone, Inactive Clear Patch, Placebo capsule
Drug
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Feb 3, 2019 · Synced Sep 14, 2026, 7:32 PM EDT
Terminated Phase 3 Interventional

Evaluation of Weekly Idrabiotaparinux Sodium Versus Oral Adjusted-dose Warfarin to Prevent Stroke and Systemic Thromboembolic Events in Patients With Atrial Fibrillation

NCT00580216
View directory record Official record
Conditions
Atrial Fibrillation
Interventions
Idrabiotaparinux sodium, Warfarin, Placebo (for idrabiotaparinux), Placebo (for warfarin), Avidin, Placebo (for avidin)
Drug
Lead sponsor
Sanofi
Industry
Eligibility
18 Years and older
Enrollment
3,773 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2010
U.S. locations
162
States / cities
Mobile, Alabama • Tucson, Arizona • Little Rock, Arkansas + 134 more
Source: ClinicalTrials.gov public record
Updated Mar 20, 2016 · Synced Sep 14, 2026, 7:32 PM EDT
Withdrawn Phase 4 Interventional

A Pilot Study Investigating the Efficacy of Minocycline and N-Acetyl Cysteine for Bipolar Depression

NCT02719392
View directory record Official record
Conditions
Bipolar Disorder, Bipolar Depression
Interventions
N-acetylcysteine, Minocycline, Placebo
Dietary Supplement · Drug · Other
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
18 Years to 65 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2026
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 23, 2026 · Synced Sep 14, 2026, 7:32 PM EDT
Completed Phase 4 Interventional Results available

The Effect of Donepezil on Gait and Balance in Parkinson's Disease

NCT01521117
View directory record Official record
Conditions
Parkinson's Disease
Interventions
Donepezil, Placebo
Drug
Lead sponsor
Oregon Health and Science University
Other
Eligibility
Not listed
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Oct 4, 2021 · Synced Sep 14, 2026, 7:32 PM EDT
Active, not recruiting Not applicable Interventional Accepts healthy volunteers

Endothelin Receptor Function and Acute Stress

NCT02116335
View directory record Official record
Conditions
Hypertension
Interventions
Bosentan, Placebo
Drug
Lead sponsor
Augusta University
Other
Eligibility
18 Years to 50 Years
Enrollment
320 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2026
U.S. locations
1
States / cities
Augusta, Georgia
Source: ClinicalTrials.gov public record
Updated Jan 27, 2025 · Synced Sep 14, 2026, 7:32 PM EDT
Withdrawn Phase 2 Interventional

Use of Zolpidem in Parkinson's Disease

NCT01351168
View directory record Official record
Conditions
Parkinson's Disease
Interventions
Levodopa, Zolpidem first dose, Zolpidem second dose, sugar pill
Drug
Lead sponsor
Rush University Medical Center
Other
Eligibility
30 Years to 75 Years
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Dec 2, 2012 · Synced Sep 14, 2026, 7:32 PM EDT
Completed Phase 3 Interventional Results available

A Two Part Study (306A/306B) to Assess Droxidopa in Treatment of NOH in Patients With Parkinson's Disease

NCT01176240
View directory record Official record
Conditions
Orthostatic Hypotension, Parkinson's Disease
Interventions
Droxidopa, Placebo
Drug · Other
Lead sponsor
Chelsea Therapeutics
Industry
Eligibility
18 Years and older
Enrollment
225 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
60
States / cities
Alabaster, Alabama • Gilbert, Arizona • Phoenix, Arizona + 53 more
Source: ClinicalTrials.gov public record
Updated May 19, 2014 · Synced Sep 14, 2026, 7:32 PM EDT
Completed Not applicable Interventional Results available

Macrolide Azithromycin to Prevent Rapid Worsening of Symptoms Associated With Chronic Obstructive Pulmonary Disease

NCT00325897
View directory record Official record
Conditions
Pulmonary Disease, Chronic Obstructive
Interventions
Macrolide Antibiotic (Azithromycin), Placebo
Drug
Lead sponsor
University of Minnesota
Other
Eligibility
40 Years and older
Enrollment
1,142 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2010
U.S. locations
10
States / cities
Birmingham, Alabama • San Francisco, California • Torrance, California + 7 more
Source: ClinicalTrials.gov public record
Updated Nov 17, 2019 · Synced Sep 14, 2026, 7:32 PM EDT
Completed Phase 2 Interventional Results available

Impact of Bosutinib on Safety, Tolerability, Biomarkers and Clinical Outcomes in Dementia With Lewy Bodies

NCT03888222
View directory record Official record
Conditions
Dementia With Lewy Bodies
Interventions
Placebo Oral Tablet, Bosutinib Oral Tablet
Drug
Lead sponsor
Georgetown University
Other
Eligibility
25 Years to 90 Years
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Washington D.C., District of Columbia
Source: ClinicalTrials.gov public record
Updated Jul 9, 2026 · Synced Sep 14, 2026, 7:32 PM EDT
Completed Phase 4 Interventional Results available

Probiotics to Promote Intestinal Health

NCT02046512
View directory record Official record
Conditions
Communicable Diseases, Infection, Anti-Infective Agents, Therapeutic Uses, Pharmacologic Actions
Interventions
Probiotic, Placebo
Dietary Supplement · Other
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older
Enrollment
89 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Apr 3, 2022 · Synced Sep 14, 2026, 7:32 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

The Effects of Dietary Nitric Oxide and Anthocyanins on Anaerobic Exercise Performance

NCT03631394
View directory record Official record
Conditions
Exercise
Interventions
beetroot and anthocyanin, beetroot and placebo
Other
Lead sponsor
Loma Linda University
Other
Eligibility
21 Years to 35 Years
Enrollment
28 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Loma Linda, California
Source: ClinicalTrials.gov public record
Updated May 14, 2019 · Synced Sep 14, 2026, 7:32 PM EDT
Completed Phase 2Phase 3 Interventional Accepts healthy volunteers Results available

Study of Ibuprofen Effects on Brain Function

NCT02507219
View directory record Official record
Conditions
Major Depressive Disorder
Interventions
Ibuprofen
Drug
Lead sponsor
Laureate Institute for Brain Research, Inc.
Other
Eligibility
18 Years to 55 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015
U.S. locations
1
States / cities
Tulsa, Oklahoma
Source: ClinicalTrials.gov public record
Updated Feb 22, 2018 · Synced Sep 14, 2026, 7:32 PM EDT
Terminated Early Phase 1 Interventional

Refined Fecal Microbiota Transplantation (FMT) for Ulcerative Colitis (UC)

NCT04968951
View directory record Official record
Conditions
Ulcerative Colitis, FMT, Fecal Microbiota Transplant
Interventions
Metronidazole, Placebo, Vancomycin, Fecal Microbiota Transplantation
Drug · Biological
Lead sponsor
Ari M Grinspan
Other
Eligibility
18 Years to 75 Years
Enrollment
4 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 25, 2024 · Synced Sep 14, 2026, 7:32 PM EDT
Terminated Phase 4 Interventional Accepts healthy volunteers Results available

Comparison of Lubiprostone and Placebo for the Relief of Constipation From Constipating Medications

NCT01096290
View directory record Official record
Conditions
Constipation
Interventions
lubiprostone, Matched placebo
Drug
Lead sponsor
University of South Alabama
Other
Eligibility
19 Years and older
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2012
U.S. locations
1
States / cities
Mobile, Alabama
Source: ClinicalTrials.gov public record
Updated Nov 19, 2020 · Synced Sep 14, 2026, 7:32 PM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers Results available

Individual Differences in Drug Response

NCT03809546
View directory record Official record
Conditions
Differential Female Response to Δ9-tetrahydrocannabinol (THC)
Interventions
Dronabinol, dextrose
Drug
Lead sponsor
University of Chicago
Other
Eligibility
18 Years to 35 Years · Female only
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2021
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jul 2, 2024 · Synced Sep 14, 2026, 7:32 PM EDT
Recruiting Phase 2 Interventional

Milk Thistle Clinical Trial in Pediatric NAFLD

NCT06477146
View directory record Official record
Conditions
Non-Alcoholic Fatty Liver Disease (NAFLD)
Interventions
Milk thistle (MT), Placebo, Lifestyle Modification, Fibroscan
Drug · Behavioral · Device
Lead sponsor
University Hospitals Cleveland Medical Center
Other
Eligibility
9 Years to 22 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2029
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 26, 2026 · Synced Sep 14, 2026, 7:32 PM EDT
Active, not recruiting Phase 3 Interventional Results available

Safety and Efficacy Study of Enzalutamide Plus Leuprolide in Patients With Nonmetastatic Prostate Cancer (EMBARK)

NCT02319837
View directory record Official record
Conditions
Hormone Sensitive Prostate Cancer, Prostate Cancer, Cancer of the Prostate
Interventions
Enzalutamide, Placebo (No longer applicable in Open Label study period), Leuprolide Open Label
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years and older · Male only
Enrollment
1,068 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2026
U.S. locations
77
States / cities
Birmingham, Alabama • Anchorage, Alaska • Tucson, Arizona + 49 more
Source: ClinicalTrials.gov public record
Updated Jul 8, 2026 · Synced Sep 14, 2026, 7:32 PM EDT
Completed Phase 2 Interventional Results available

A Randomized, Double-Blind, Comparator- and Placebo-Controlled, Multiple-Dose Study to Evaluate the Safety, Tolerability and Efficacy of Three Dose Levels of MSDC-0602 in Type 2 Diabetic Patients

NCT01280695
View directory record Official record
Conditions
Diabetes Mellitus, Type 2
Interventions
Placebo, MSDC-0602 100 mg, MSDC-0602 250 mg, Pioglitazone
Drug
Lead sponsor
Metabolic Solutions Development Company
Industry
Eligibility
18 Years to 75 Years
Enrollment
129 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011
U.S. locations
14
States / cities
Goodyear, Arizona • Chula Vista, California • Los Angeles, California + 11 more
Source: ClinicalTrials.gov public record
Updated Apr 13, 2014 · Synced Sep 14, 2026, 7:32 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers Results available

Combined Antioxidant and Preeclampsia Prediction Studies (CAPPS)

NCT00135707
View directory record Official record
Conditions
Preeclampsia
Interventions
Dietary Supplement/Vitamins, Placebo for Vitamin C and Vitamin E
Drug
Lead sponsor
The George Washington University Biostatistics Center
Other
Eligibility
Female only
Enrollment
10,154 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2009
U.S. locations
16
States / cities
Birmingham, Alabama • Chicago, Illinois • Detroit, Michigan + 13 more
Source: ClinicalTrials.gov public record
Updated Feb 20, 2019 · Synced Sep 14, 2026, 7:32 PM EDT
Completed Phase 2 Interventional

Centella Asiatica Selected Triterpenes (CAST) for Diabetic Neuropathy

NCT00608439
View directory record Official record
Conditions
Diabetic Neuropathy
Interventions
Centella asiatica selected triterpenes (CAST), Placebo
Drug · Other
Lead sponsor
Oregon Health and Science University
Other
Eligibility
18 Years to 85 Years
Enrollment
43 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2011
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Nov 11, 2012 · Synced Sep 14, 2026, 7:32 PM EDT
Terminated Phase 2 Interventional Results available

Fecal Microbiota Transplantation for C. Difficile Infection in Solid Organ Transplant Recipients

NCT03617445
View directory record Official record
Conditions
Clostridium Difficile Infection Recurrence
Interventions
FMT oral capsule, Oral Vancomycin, FMT oral placebo, Oral Vancomycin placebo
Drug
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years and older
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
5
States / cities
Chicago, Illinois • Indianapolis, Indiana • Rochester, Minnesota + 2 more
Source: ClinicalTrials.gov public record
Updated Jan 8, 2025 · Synced Sep 14, 2026, 7:32 PM EDT
Active, not recruiting Phase 1Phase 2 Interventional

Intestinal Microbiota Transplant in Alcohol-Associated Liver Disease

NCT05548452
View directory record Official record
Conditions
Liver Disease; Alcohol-Related, Cirrhosis, Alcohol Use Disorder
Interventions
Intestinal Microbiota Transplant (IMT) Capsules, Placebo Capsules
Drug
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
2
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Aug 23, 2026 · Synced Sep 14, 2026, 7:32 PM EDT
Completed Phase 4 Interventional Results available

Lisdexamfetamine Dimesylate in Residual Symptoms and Cognitive Impairment in Major Depressive Disorder.

NCT01148979
View directory record Official record
Conditions
Major Depressive Disorder
Interventions
Lisdexamfetamine Dimesylate (Vyvanse), Placebo
Drug
Lead sponsor
Mclean Hospital
Other
Eligibility
18 Years to 65 Years
Enrollment
35 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
Belmont, Massachusetts
Source: ClinicalTrials.gov public record
Updated May 22, 2017 · Synced Sep 14, 2026, 7:32 PM EDT