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ClinicalTrials.gov public records Last synced Oct 3, 2026, 5:32 AM EDT

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Showing 1–24 of 46 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: placebo (inert substance) Clear all
Terminated Phase 3 Interventional Results available

Treatment of Long CoronaVirus Disease (COVID) (TLC) Feasibility Trial

NCT05946551
View directory record Official record
Conditions
COVID-19
Interventions
Cetirizine, Famotidine, Cetirizine Placebo, Famotidine Placebo
Drug
Lead sponsor
Emory University
Other
Eligibility
18 Years and older
Enrollment
5 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024
U.S. locations
4
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Jul 17, 2025 · Synced Oct 3, 2026, 5:32 AM EDT
Completed Phase 2 Interventional Results available

Energy Metabolism in Thyroidectomized Patients

NCT04782856
View directory record Official record
Conditions
Thyroid Goiter, Hypothyroidism, Thyroid Cancer
Interventions
Levothyroxine, Liothyronine, Placebo
Drug
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
18 Years to 89 Years
Enrollment
13 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2023
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Jun 14, 2024 · Synced Oct 3, 2026, 5:32 AM EDT
Active, not recruiting Phase 2 Interventional

Psilocybin Treatment of Major Depressive Disorder With Co-occurring Alcohol Use Disorder

NCT04620759
View directory record Official record
Conditions
Major Depressive Disorder, Alcohol Use Disorder
Interventions
Psilocybin, Placebo
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
21 Years to 65 Years
Enrollment
90 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 13, 2026 · Synced Oct 3, 2026, 5:32 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Effect of a Ghrelin Receptor Agonist on Muscle and Bone

NCT04021706
View directory record Official record
Conditions
Sarcopenia, Osteopenia
Interventions
Anamorelin Hydrochloride, Placebo
Drug
Lead sponsor
Tufts University
Other
Eligibility
50 Years and older
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 27, 2024 · Synced Oct 3, 2026, 5:32 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

Efficacy and Tolerability of Suprep With and Without Simethicone for Routine Colonoscopy for Colorectal Cancer Screening

NCT02523911
View directory record Official record
Conditions
Colorectal Cancer
Interventions
Simethicone, Placebo, sodium sulfate/potassium sulfate/magnesium sulfate solution
Drug
Lead sponsor
MercyOne Des Moines Medical Center
Other
Eligibility
18 Years and older
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
2
States / cities
Jacksonville, Florida • Clive, Iowa
Source: ClinicalTrials.gov public record
Updated Feb 12, 2020 · Synced Oct 3, 2026, 5:32 AM EDT
Completed Not applicable Interventional Results available

The Role of Substance P on Perception of Breathlessness During Resistive Load Breathing

NCT01580423
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease
Interventions
aprepitant, placebo
Drug
Lead sponsor
Dartmouth-Hitchcock Medical Center
Other
Eligibility
50 Years and older
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
Lebanon, New Hampshire
Source: ClinicalTrials.gov public record
Updated Jul 19, 2013 · Synced Oct 3, 2026, 5:32 AM EDT
Completed Phase 3 Interventional

Ph 3 ADI-PEG 20 Versus Placebo in Subjects With Advanced Hepatocellular Carcinoma Who Have Failed Prior Systemic Therapy

NCT01287585
View directory record Official record
Conditions
Hepatocellular Carcinoma
Interventions
ADI-PEG 20 (arginine deiminase formulated with polyethylene glycol), Placebo, Best Supportive Care
Drug · Other
Lead sponsor
Polaris Group
Industry
Eligibility
18 Years and older
Enrollment
636 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
21
States / cities
Birmingham, Alabama • Coronado, California • La Jolla, California + 16 more
Source: ClinicalTrials.gov public record
Updated Sep 6, 2019 · Synced Oct 3, 2026, 5:32 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Effects of New Zealand Blackcurrant Supplementation on Exercise and Cognitive Performance in Resistance-Trained Adults

NCT07619976
View directory record Official record
Conditions
Resistance Exercise Performance, Cognitive Function, Anaerobic Performance, Dietary Supplementation Athletic Performance
Interventions
Low-dose Blackcurrant Supplement, High-dose Blackcurrant Supplement, Maltodextrin (Placebo)
Dietary Supplement
Lead sponsor
Jacksonville State University
Other
Eligibility
18 Years to 40 Years
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023
U.S. locations
1
States / cities
Jacksonville, Alabama
Source: ClinicalTrials.gov public record
Updated Jun 2, 2026 · Synced Oct 3, 2026, 5:32 AM EDT
Active, not recruiting Phase 3 Interventional

Predicting Responses to PTSD Treatment With Iris and Cardiovascular Tests

NCT03539614
View directory record Official record
Conditions
Posttraumatic Stress Disorder
Interventions
Prazosin, Placebo
Drug
Lead sponsor
VA Office of Research and Development
Federal
Eligibility
21 Years to 75 Years
Enrollment
87 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2026
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Aug 14, 2026 · Synced Oct 3, 2026, 5:32 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Vitamin D to ENhance TraUma REcovery

NCT05458024
View directory record Official record
Conditions
Musculoskeletal Pain
Interventions
Vitamin D 2, Vitamin D2 Placebo
Drug
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
18 Years to 65 Years
Enrollment
71 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
4
States / cities
Worcester, Massachusetts • St Louis, Missouri • Camden, New Jersey + 1 more
Source: ClinicalTrials.gov public record
Updated Mar 28, 2025 · Synced Oct 3, 2026, 5:32 AM EDT
Not yet recruiting Phase 3 Interventional

Vibegron for ENergy Thinking and Resilience in Aging

NCT06987383
View directory record Official record
Conditions
Obesity
Interventions
Vibegron, Placebo
Drug
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
45 Years to 75 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Sep 29, 2026 · Synced Oct 3, 2026, 5:32 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Metabolism of Bioactive Dietary Polyphenol Preparation (BDPP)

NCT04421079
View directory record Official record
Conditions
Healthy Control
Interventions
Trans-resveratrol, Concord grape juice, Grape seed polyphenol extract, Placebo
Dietary Supplement · Drug
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
18 Years to 55 Years
Enrollment
84 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2024
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 3, 2025 · Synced Oct 3, 2026, 5:32 AM EDT
Completed Phase 2 Interventional Results available

Carbidopa for the Treatment of Excessive Blood Pressure Variability

NCT02553265
View directory record Official record
Conditions
Dysautonomia, Familial, Baroreflex Failure Syndrome
Interventions
Carbidopa Low-Dose, Placebo, Carbidopa High-Dose
Drug · Other
Lead sponsor
NYU Langone Health
Other
Eligibility
10 Years to 60 Years
Enrollment
22 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2019
U.S. locations
2
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Feb 9, 2022 · Synced Oct 3, 2026, 5:32 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Instaflex and Joint Pain in Community Adults

NCT01956500
View directory record Official record
Conditions
Joint Pain, Stiffness, Function
Interventions
Instaflex, Placebo
Dietary Supplement
Lead sponsor
Appalachian State University
Other
Eligibility
50 Years to 75 Years
Enrollment
110 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
1
States / cities
Kannapolis, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 8, 2013 · Synced Oct 3, 2026, 5:32 AM EDT
Completed Not applicable Interventional Results available

Differentiating the Effects of Substance P and Beta-endorphin

NCT01854177
View directory record Official record
Conditions
Chronic Obstructive Pulmonary Disease
Interventions
Aprepitant, Placebo
Drug
Lead sponsor
Dartmouth-Hitchcock Medical Center
Other
Eligibility
50 Years to 90 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013
U.S. locations
1
States / cities
Lebanon, New Hampshire
Source: ClinicalTrials.gov public record
Updated Oct 30, 2018 · Synced Oct 3, 2026, 5:32 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Dose-Response Effects of Short-Term Ashwagandha on Anaerobic Exercise and Cognitive Function in Resistance-Trained Athletes

NCT07853274
View directory record Official record
Conditions
Resistance Exercise Performance, Cognitive Functions, Anaerobic Performance, Dietary Supplementation Athletic Performance
Interventions
Low-dose Ashwagandha Supplement, High-dose Ashwagandha Supplement, Maltodextrin (Placebo)
Dietary Supplement
Lead sponsor
Jacksonville State University
Other
Eligibility
18 Years to 40 Years
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2025
U.S. locations
1
States / cities
Jacksonville, Alabama
Source: ClinicalTrials.gov public record
Updated Oct 1, 2026 · Synced Oct 3, 2026, 5:32 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Oral Curcumin Supplementation in Middle-Aged and Older Adults Improves Vascular Function

NCT01968564
View directory record Official record
Conditions
Vascular Aging
Interventions
Placebo pill, High-dose curcumin pill, Low-dose curcumin pill
Drug
Lead sponsor
University of Colorado, Boulder
Other
Eligibility
45 Years to 80 Years
Enrollment
118 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2017
U.S. locations
1
States / cities
Boulder, Colorado
Source: ClinicalTrials.gov public record
Updated Mar 20, 2017 · Synced Oct 3, 2026, 5:32 AM 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 5, 2025 · Synced Oct 3, 2026, 5:32 AM EDT
Completed Phase 2 Interventional

Metformin for Older Patients With Heart Failure With Preserved Ejection Fraction

NCT05093959
View directory record Official record
Conditions
Heart Failure With Preserved Ejection Fraction
Interventions
Metformin, Placebo
Drug
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
60 Years and older
Enrollment
86 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
2
States / cities
Charlotte, North Carolina • Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Jun 10, 2026 · Synced Oct 3, 2026, 5:32 AM EDT
Completed Not applicable Interventional Results available

Alzheimer's in Long-Term Care--Treatment for Agitation

NCT00161473
View directory record Official record
Conditions
Alzheimer Disease, Psychomotor Agitation
Interventions
prazosin, placebo (inert substance)
Drug
Lead sponsor
University of Washington
Other
Eligibility
Not listed
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2009
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Aug 2, 2012 · Synced Oct 3, 2026, 5:32 AM EDT
Completed Not applicable Interventional Results available

Mechanisms of Antidepressant Non-Response in Late-Life Depression

NCT01931202
View directory record Official record
Conditions
Major Depressive Disorder
Interventions
Escitalopram, Placebo oral tablet
Drug
Lead sponsor
New York State Psychiatric Institute
Other
Eligibility
60 Years to 90 Years
Enrollment
138 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2020
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jul 2, 2020 · Synced Oct 3, 2026, 5:32 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers

A Neuroimaging Study of Open-label Placebo in Depressed Adolescents

NCT04201106
View directory record Official record
Conditions
Depression
Interventions
Open Label Placebo with Rationale, Open Label Placebo without Rationale
Behavioral
Lead sponsor
University of California, San Francisco
Other
Eligibility
13 Years to 18 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2020 – 2022
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jul 29, 2026 · Synced Oct 3, 2026, 5:32 AM EDT
Recruiting Phase 4 Interventional

Prophylactic Oral Antibiotics on Sinonasal Outcomes Following Endoscopic Transsphenoidal Surgery for Pituitary Lesions

NCT03014687
View directory record Official record
Conditions
Antibiotics, Pituitary Adenoma
Interventions
Placebo, Oral Antibiotics cefdinir or trimethoprim/sulfamethoxazole
Drug
Lead sponsor
St. Joseph's Hospital and Medical Center, Phoenix
Other
Eligibility
18 Years to 84 Years
Enrollment
116 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Aug 15, 2018 · Synced Oct 3, 2026, 5:32 AM EDT
Completed Not applicable Interventional Results available

Prazosin Treatment for Disruptive Agitation in Alzheimer's Disease

NCT01126099
View directory record Official record
Conditions
Alzheimer's Disease
Interventions
Prazosin, Placebo
Drug
Lead sponsor
Seattle Institute for Biomedical and Clinical Research
Other
Eligibility
Not listed
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated May 21, 2015 · Synced Oct 3, 2026, 5:32 AM EDT