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Showing 1–24 of 2,698 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: 2 placebo Capsules Clear all
Completed Not applicable Interventional Accepts healthy volunteers

Effects of Ashwagandha Extract (Capsule KSM-66 300 mg) on Sexual Health in Healthy Women

NCT05831241
View directory record Official record
Conditions
Sexual Health
Interventions
Ashwagandha, Placebo
Dietary Supplement · Other
Lead sponsor
SF Research Institute, Inc.
Network
Eligibility
18 Years to 55 Years · Female only
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Mar 10, 2025 · Synced Sep 5, 2026, 9:29 AM EDT
Completed Phase 3 Interventional Results available

Safety and Maintenance of Effect of Ziprasidone Plus a Mood Stabilizer in Bipolar I Disorder (Manic or Mixed)

NCT00280566
View directory record Official record
Conditions
Bipolar Mania, Bipolar Disorder
Interventions
Placebo, Ziprasidone Oral Capsule
Drug
Lead sponsor
Pfizer's Upjohn has merged with Mylan to form Viatris Inc.
Industry
Eligibility
18 Years and older
Enrollment
584 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2005 – 2008
U.S. locations
73
States / cities
Birmingham, Alabama • Scottsdale, Arizona • Little Rock, Arkansas + 59 more
Source: ClinicalTrials.gov public record
Updated Mar 24, 2021 · Synced Sep 5, 2026, 9:29 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Treatment of Gardnerella Vaginalis Vaginal Colonization With Amoxicillin

NCT03211156
View directory record Official record
Conditions
Vaginitis Gardnerella
Interventions
Amoxicillin, Placebo
Drug · Other
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 45 Years · Female only
Enrollment
97 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
2
States / cities
Birmingham, Alabama • Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 27, 2020 · Synced Sep 5, 2026, 9:29 AM EDT
Completed Phase 2 Interventional Results available

A Phase 2, to Evaluating the Safety and Efficacy of Pridopidine Vs Placebo for Symptomatic Treatment in Patients With Huntington's Disease

NCT02006472
View directory record Official record
Conditions
Huntington's Disease
Interventions
Pridopidine, Placebo
Drug · Other
Lead sponsor
Prilenia
Industry
Eligibility
21 Years and older
Enrollment
408 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
16
States / cities
La Jolla, California • Los Angeles, California • Englewood, Colorado + 12 more
Source: ClinicalTrials.gov public record
Updated Jul 18, 2021 · Synced Sep 5, 2026, 9:29 AM EDT
Completed Phase 2 Interventional Results available

Effects of Gabapentin Versus Placebo on Buprenorphine Detoxification of Opioid-dependent Individuals

NCT01262092
View directory record Official record
Conditions
Opioid Dependence, Opioid Withdrawal, Opioid Detoxification
Interventions
Buprenorphine
Drug
Lead sponsor
University of Arkansas
Other
Eligibility
18 Years to 65 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
1
States / cities
Little Rock, Arkansas
Source: ClinicalTrials.gov public record
Updated Jun 20, 2013 · Synced Sep 5, 2026, 9:29 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Determinants of Changes in Arterial Load Following Exercise

NCT05820243
View directory record Official record
Conditions
Post-Exercise Hypotension
Interventions
Moderate Intensity Aerobic Exercise
Other
Lead sponsor
University of Delaware
Other
Eligibility
18 Years to 45 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Newark, Delaware
Source: ClinicalTrials.gov public record
Updated Nov 27, 2023 · Synced Sep 5, 2026, 9:29 AM EDT
Recruiting Phase 2 Interventional

Evaluation of RBS2418 in Patients With Advanced, Metastatic, and Progressive Colorectal Cancer

NCT06824064
View directory record Official record
Conditions
Metastatic Colorectal Cancer, Advanced Colorectal Cancer
Interventions
RBS2418, Placebo
Drug
Lead sponsor
Riboscience, LLC.
Industry
Eligibility
18 Years and older
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
2
States / cities
Newark, Delaware • Kingwood, Texas
Source: ClinicalTrials.gov public record
Updated May 17, 2026 · Synced Sep 5, 2026, 9:29 AM EDT
Completed Phase 4 Interventional Results available

Efficacy and Safety of Dex-Methylphenidate Extended Release 30 mg Versus 20 mg in Children (6-12 Years) With Attention-Deficit/Hyperactivity Disorder (ADHD) in a Laboratory Classroom Setting.

NCT00776009
View directory record Official record
Conditions
Attention-Deficit/Hyperactivity Disorder (ADHD)
Interventions
Dex-Methylphenidate hydrochloride Extended Release (Focalin® XR), Placebo
Drug
Lead sponsor
Novartis Pharmaceuticals
Industry
Eligibility
6 Years to 12 Years
Enrollment
165 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008
U.S. locations
8
States / cities
Little Rock, Arkansas • Bradenton, Florida • South Miami, Florida + 4 more
Source: ClinicalTrials.gov public record
Updated Jun 7, 2011 · Synced Sep 5, 2026, 9:29 AM EDT
Completed Phase 3 Interventional

A Multicenter, Randomized, Double-blind, Placebo-controlled Study to Evaluate the Safety and Tolerability of Oral Lixivaptan Capsules in Subjects With Euvolemic Hyponatremia

NCT00876798
View directory record Official record
Conditions
Euvolemic Hyponatremia
Interventions
Lixivaptan, Placebo
Drug
Lead sponsor
CardioKine Inc.
Industry
Eligibility
18 Years and older
Enrollment
206 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2009
U.S. locations
66
States / cities
Birmingham, Alabama • Montgomery, Alabama • Phoenix, Arizona + 54 more
Source: ClinicalTrials.gov public record
Updated Jun 27, 2011 · Synced Sep 5, 2026, 9:29 AM EDT
Completed Phase 3 Interventional Results available

Pembrolizumab/Placebo Plus Trastuzumab Plus Chemotherapy in Human Epidermal Growth Factor Receptor 2 Positive (HER2+) Advanced Gastric or Gastroesophageal Junction (GEJ) Adenocarcinoma (MK-3475-811/KEYNOTE-811)

NCT03615326
View directory record Official record
Conditions
Gastric Neoplasms, Gastroesophageal Junction Adenocarcinoma
Interventions
Pembrolizumab, Placebo, Cisplatin, 5-FU, Oxaliplatin, Capecitabine, S-1, Trastuzumab
Biological · Drug
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Eligibility
18 Years and older
Enrollment
738 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2025
U.S. locations
23
States / cities
Los Angeles, California • Monterey, California • Orange, California + 19 more
Source: ClinicalTrials.gov public record
Updated Aug 25, 2026 · Synced Sep 5, 2026, 9:29 AM EDT
Recruiting Phase 2 Interventional

Prazosin for Alcohol Use Disorder With Withdrawal Symptoms

NCT04793685
View directory record Official record
Conditions
Alcohol Withdrawal
Interventions
Prazosin, 12-Step Facilitation with Relapse Prevention and Contingency Management
Drug · Behavioral
Lead sponsor
Yale University
Other
Eligibility
18 Years to 70 Years
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2027
U.S. locations
1
States / cities
New Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Dec 10, 2025 · Synced Sep 5, 2026, 9:29 AM EDT
Not listed Not applicable Interventional

C15:0 Supplementation in Young Adults at Risk for Metabolic Syndrome

NCT04947176
View directory record Official record
Conditions
Metabolic Syndrome
Interventions
Supplement, Placebo
Dietary Supplement · Other
Lead sponsor
Jeffrey B. Schwimmer, MD
Other
Eligibility
18 Years to 25 Years
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
La Jolla, California
Source: ClinicalTrials.gov public record
Updated Jun 4, 2023 · Synced Sep 5, 2026, 9:29 AM EDT
Completed Phase 2 Interventional Results available

Safety, Tolerability, and Efficacy of NBI-98854 for the Treatment of Pediatric Subjects With Tourette Syndrome

NCT03325010
View directory record Official record
Conditions
Tourette Syndrome
Interventions
Valbenazine, Placebo oral capsule
Drug
Lead sponsor
Neurocrine Biosciences
Industry
Eligibility
6 Years to 17 Years
Enrollment
127 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
34
States / cities
Sun City, Arizona • Rogers, Arkansas • Anaheim, California + 27 more
Source: ClinicalTrials.gov public record
Updated Jun 27, 2021 · Synced Sep 5, 2026, 9:29 AM EDT
Completed Early Phase 1 Interventional Accepts healthy volunteers

Effects of THC on Emotional Memory Retrieval

NCT03471585
View directory record Official record
Conditions
Healthy
Interventions
THC, Placebo oral capsule
Drug
Lead sponsor
University of Chicago
Other
Eligibility
18 Years to 35 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated May 29, 2019 · Synced Sep 5, 2026, 9:29 AM EDT
Recruiting Phase 2 Interventional

Interventional Study of Infigratinib in Children < 3 Years Old With Achondroplasia (ACH)

NCT07169279
View directory record Official record
Conditions
Achondroplasia
Interventions
Infigratinib is provided as a single dose of minitablets for oral administration, Infigratinib is provided as sprinkle capsules for daily oral administration, Infigratinib or placebo comparator is provided as sprinkle capsules for daily oral administration
Drug
Lead sponsor
QED Therapeutics, a BridgeBio company
Industry
Eligibility
0 Years to 32 Months
Enrollment
77 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2032
U.S. locations
3
States / cities
Oakland, California • Baltimore, Maryland • Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jul 12, 2026 · Synced Sep 5, 2026, 9:29 AM EDT
Terminated Phase 2Phase 3 Interventional Accepts healthy volunteers

Trenev Trio/Healthy Trinity for Symptoms of Diarrhea-predominant Irritable Bowel Syndrome (IBS) and Functional Dyspepsia

NCT01268618
View directory record Official record
Conditions
IBS-D and Functional Dyspepsia
Interventions
Probiotic, Placebo
Dietary Supplement
Lead sponsor
Sprim Advanced Life Sciences
Other
Eligibility
18 Years to 75 Years
Enrollment
120 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011
U.S. locations
2
States / cities
Duluth, Georgia • Norfolk, Virginia
Source: ClinicalTrials.gov public record
Updated Jul 20, 2011 · Synced Sep 5, 2026, 9:29 AM EDT
Completed Phase 3 Interventional Results available

Twice-daily Oral Direct Thrombin Inhibitor Dabigatran Etexilate in the Long Term Prevention of Recurrent Symptomatic VTE

NCT00558259
View directory record Official record
Conditions
Venous Thromboembolism
Interventions
dabigatran etexilate 150 mg twice daily (BID), matching placebo twice daily (BID)
Drug
Lead sponsor
Boehringer Ingelheim
Industry
Eligibility
18 Years and older
Enrollment
1,353 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Started 2007
U.S. locations
21
States / cities
Birmingham, Alabama • Huntsville, Alabama • Laguna Hills, California + 17 more
Source: ClinicalTrials.gov public record
Updated Jun 26, 2014 · Synced Sep 5, 2026, 9:29 AM EDT
Completed Phase 4 Interventional Results available

A Comparison of Olanzapine in Combination With a Mood Stabilizer vs Mood Stabilizer Alone, in Mixed Bipolar Patients

NCT00402324
View directory record Official record
Conditions
Bipolar I Disorder
Interventions
olanzapine, placebo, divalproex
Drug
Lead sponsor
Eli Lilly and Company
Industry
Eligibility
18 Years to 60 Years
Enrollment
202 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
Hialeah, Florida
Source: ClinicalTrials.gov public record
Updated Jun 2, 2009 · Synced Sep 5, 2026, 9:29 AM EDT
Completed Phase 1Phase 2 Interventional

Study of NP002 in Subjects With Idiopathic Parkinson's Disease to Treat Dyskinesias Due to Levodopa Therapy

NCT00957918
View directory record Official record
Conditions
Parkinson's Disease
Interventions
nicotine, placebo comparator
Drug · Other
Lead sponsor
Neuraltus Pharmaceuticals, Inc.
Industry
Eligibility
30 Years to 83 Years
Enrollment
65 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
12
States / cities
Phoenix, Arizona • Los Angelis, California • Oxnard, California + 9 more
Source: ClinicalTrials.gov public record
Updated Oct 4, 2011 · Synced Sep 5, 2026, 9:29 AM EDT
Completed Phase 3 Interventional Results available

Efficacy and Safety Study of a Test Naproxen Sodium 220mg Tablet in Postoperative Dental Pain

NCT03566979
View directory record Official record
Conditions
Post-operative Dental Pain
Interventions
Test naproxen sodium tablet, Commercial naproxen sodium tablet, Commercial naproxen sodium liquid gels capsule, Placebo tablet
Drug
Lead sponsor
Johnson & Johnson Consumer Inc., McNeil Consumer Healthcare Division
Industry
Eligibility
17 Years to 50 Years
Enrollment
501 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2019
U.S. locations
1
States / cities
Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Apr 8, 2020 · Synced Sep 5, 2026, 9:29 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Evoked Responses as Pharmacodynamic Biomarkers in Healthy and Schizophrenic Participants (MK-4334-007)

NCT05136690
View directory record Official record
Conditions
Cognitive Impairment Associated With Schizophrenia
Interventions
Nicotine patch, MK-4334, Placebo patch, Placebo capsule
Drug
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Eligibility
18 Years to 55 Years
Enrollment
38 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022
U.S. locations
2
States / cities
Long Beach, California • Marlton, New Jersey
Source: ClinicalTrials.gov public record
Updated Nov 28, 2024 · Synced Sep 5, 2026, 9:29 AM EDT
Terminated Phase 2 Interventional

Pharmacodynamic Study of CK-2017357 in Patients With Generalized Myasthenia Gravis

NCT01268280
View directory record Official record
Conditions
Myasthenia Gravis
Interventions
Placebo, 250 mg CK-2017357, 500 mg CK-2017357
Drug
Lead sponsor
Cytokinetics
Industry
Eligibility
18 Years to 80 Years
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2012
U.S. locations
15
States / cities
Fresno, California • Orange, California • San Francisco, California + 12 more
Source: ClinicalTrials.gov public record
Updated Sep 23, 2019 · Synced Sep 5, 2026, 9:29 AM EDT
Not listed Phase 4 Interventional Accepts healthy volunteers

Kronos Early Estrogen Prevention Study (KEEPS)

NCT00154180
View directory record Official record
Conditions
Menopause, Arteriosclerosis
Interventions
Conjugated equine estrogens 0.45 mg/day, Transdermal estradiol, 50 mcg/day, Micronized progesterone, 200 mg/day x 12 d/month, CEE , progesterone, estradiol patch or placebo for each, CEE, progesterone, transdermal patch or the placebo
Drug
Lead sponsor
Kronos Longevity Research Institute
Other
Eligibility
42 Years to 58 Years · Female only
Enrollment
728 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2012
U.S. locations
9
States / cities
Phoenix, Arizona • San Francisco, California • New Haven, Connecticut + 6 more
Source: ClinicalTrials.gov public record
Updated Sep 13, 2009 · Synced Sep 5, 2026, 9:29 AM EDT
Completed Phase 1 Interventional Results available

Safety, Tolerability and Pharmacokinetics Study of STP1 in a Subgroup of Patients With Autism Spectrum Disorder (ASD)

NCT04644003
View directory record Official record
Conditions
Autism Spectrum Disorder
Interventions
STP1, Placebo
Drug
Lead sponsor
Stalicla SA
Industry
Eligibility
18 Years to 40 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Cincinnati, Ohio
Source: ClinicalTrials.gov public record
Updated Nov 7, 2024 · Synced Sep 5, 2026, 9:29 AM EDT