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Showing 1–24 of 203 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Placebo Gel Dosage Clear all
Completed Phase 1 Interventional Accepts healthy volunteers

Contraception and Menstrual Cycle Effect on Pharmacokinetics, Pharmacodynamics and Safety in Tenofovir Vaginal Gel Use

NCT01421368
View directory record Official record
Conditions
HIV Prevention
Interventions
Tenofovir 1% vaginal gel, Depo-medroxyprogesterone acetate (DMPA), Oral contraceptive: LNG 150 mcg and EE 30 mcg
Drug
Lead sponsor
CONRAD
Other
Eligibility
18 Years to 50 Years · Female only
Enrollment
72 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2014
U.S. locations
2
States / cities
Pittsburgh, Pennsylvania • Norfolk, Virginia
Source: ClinicalTrials.gov public record
Updated Apr 9, 2015 · Synced Sep 23, 2026, 9:45 AM EDT
Completed Phase 2 Interventional Results available

NFX-179 Topical Gel Treatment for Adults With Neurofibromatosis 1 (NF1) and Cutaneous Neurofibromas (cNF)

NCT05005845
View directory record Official record
Conditions
Cutaneous Neurofibroma, Neurofibromatosis 1
Interventions
NFX-179 gel, Vehicle gel
Drug
Lead sponsor
NFlection Therapeutics, Inc.
Industry
Eligibility
18 Years and older
Enrollment
199 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
23
States / cities
Little Rock, Arkansas • Rogers, Arkansas • Fremont, California + 20 more
Source: ClinicalTrials.gov public record
Updated Feb 16, 2026 · Synced Sep 23, 2026, 9:45 AM EDT
Terminated Phase 1Phase 2 Interventional Results available

Hypertrophic Scar Prevention by Novel Topical Gel Application

NCT03403621
View directory record Official record
Conditions
Hypertrophic Scar
Interventions
Pentamidine Isethionate, Placebo
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years and older
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Nov 21, 2023 · Synced Sep 23, 2026, 9:45 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

HOP-3 Manipulation of the Intratesticular Hormonal Milieu With Exogenous Testosterone

NCT00839319
View directory record Official record
Conditions
Healthy Males
Interventions
Acyline, placebo hCG (no active ingredient), hCG (human chorionic gonadotropin), Testosterone gel
Drug · Other
Lead sponsor
University of Washington
Other
Eligibility
18 Years to 50 Years · Male only
Enrollment
59 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2010
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jan 10, 2016 · Synced Sep 23, 2026, 9:45 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Duration of Effect of Acidform Gel on Vaginal pH

NCT02693418
View directory record Official record
Conditions
Healthy
Interventions
Acidform 5 g, Placebo 4 g, Acidform 4 g, Acidform 3 g
Drug
Lead sponsor
Evofem Inc.
Industry
Eligibility
18 Years to 45 Years · Female only
Enrollment
105 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016
U.S. locations
2
States / cities
Baltimore, Maryland • Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Nov 19, 2020 · Synced Sep 23, 2026, 9:45 AM EDT
Completed Phase 1Phase 2 Interventional Accepts healthy volunteers Results available

T-IR- Study to Understand the Effects of Testosterone and Estrogen on the Body's Response to the Hormone Insulin

NCT01686828
View directory record Official record
Conditions
Insulin Resistance, Type 2 Diabetes Mellitus, Obesity, Androgen Deficiency, Metabolic Disease
Interventions
Acyline, Testosterone 1.62% gel, Letrozole, Placebo gel (for Testosterone 1.62% gel), Placebo pill (for Letrozole)
Drug
Lead sponsor
University of Washington
Other
Eligibility
25 Years to 55 Years · Male only
Enrollment
53 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2017
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated May 7, 2018 · Synced Sep 23, 2026, 9:45 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers

A 4-Arm Efficacy and Safety Study of RT001 for the Treatment of Moderate to Severe Lateral Canthal Lines in Adults

NCT01124552
View directory record Official record
Conditions
Lateral Canthal Lines, Crow's Feet, Facial Wrinkles
Interventions
RT001 Botulinum toxin type A (Dose A), RT001 Botulinum Toxin Type A (Dose B), Vehicle, Placebo
Drug · Other
Lead sponsor
Revance Therapeutics, Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
180 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010
U.S. locations
1
States / cities
Coral Gables, Florida
Source: ClinicalTrials.gov public record
Updated Jan 29, 2014 · Synced Sep 23, 2026, 9:45 AM EDT
Completed Phase 2 Interventional

Study of OLT1177 Gel to Treat Moderate to Severe OA Knee Pain

NCT02104050
View directory record Official record
Conditions
Osteoarthritis, Pain
Interventions
Placebo Gel, OLT1177 Gel
Drug
Lead sponsor
Olatec Therapeutics, Inc.
Industry
Eligibility
45 Years to 80 Years
Enrollment
202 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
13
States / cities
Birmingham, Alabama • Milford, Connecticut • DeLand, Florida + 10 more
Source: ClinicalTrials.gov public record
Updated Oct 5, 2017 · Synced Sep 23, 2026, 9:45 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Study in Subjects to Evaluate the Safety, Tolerability and Pharmacokinetics of GT20029

NCT05428449
View directory record Official record
Conditions
Androgenetic Alopecia, Acne Vulgaris
Interventions
GT20029 Gel, GT20029 Gel Placebo
Drug
Lead sponsor
Suzhou Kintor Pharmaceutical Inc,
Industry
Eligibility
18 Years to 60 Years
Enrollment
123 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
2
States / cities
San Diego, California • Salt Lake City, Utah
Source: ClinicalTrials.gov public record
Updated Aug 13, 2023 · Synced Sep 23, 2026, 9:45 AM EDT
Not listed Not applicable Interventional Accepts healthy volunteers

Regulation of Cortisol Metabolism and Fat Patterning

NCT00694733
View directory record Official record
Conditions
Obesity, Menopausal Syndrome
Interventions
Placebo injection, Depo Lupron/Aromatase inhibitor, Depo Lupron/placebo, placebo, Estrogen cream
Drug
Lead sponsor
Oregon Health and Science University
Other
Eligibility
18 Years to 62 Years
Enrollment
140 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2024
U.S. locations
1
States / cities
Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Dec 15, 2022 · Synced Sep 23, 2026, 9:45 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Testosterone Replacement in Older Men and Atherosclerosis Progression

NCT00287586
View directory record Official record
Conditions
Hypogonadism, Atherosclerosis
Interventions
Testosterone Gel (Androgel), Placebo
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
60 Years and older · Male only
Enrollment
308 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2004 – 2012
U.S. locations
3
States / cities
Phoenix, Arizona • Los Angeles, California • Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jun 28, 2017 · Synced Sep 23, 2026, 9:45 AM EDT
Completed Phase 1Phase 2 Interventional

Safety and Efficacy of PG101 for Dry Eye Syndrome

NCT02078661
View directory record Official record
Conditions
Dry Eye Syndrome
Interventions
PG101
Drug
Lead sponsor
Rhodes Pharmaceuticals, L.P.
Industry
Eligibility
18 Years and older
Enrollment
72 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2014
U.S. locations
1
States / cities
Andover, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 4, 2014 · Synced Sep 23, 2026, 9:45 AM EDT
Completed Phase 4 Interventional Results available

Neuroendocrine Dysfunction in Traumatic Brain Injury: Effects of Testosterone Therapy

NCT01201863
View directory record Official record
Conditions
Endocrine Dysfunction, Trauma, Brain Injury
Interventions
Androgel (Testosterone Gel), Placebo gel
Drug · Other
Lead sponsor
Craig Hospital
Other
Eligibility
16 Years to 65 Years · Male only
Enrollment
46 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2014
U.S. locations
1
States / cities
Englewood, Colorado
Source: ClinicalTrials.gov public record
Updated Jul 26, 2021 · Synced Sep 23, 2026, 9:45 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

TEAM: Testosterone Supplementation and Exercise in Elderly Men

NCT00112151
View directory record Official record
Conditions
Healthy
Interventions
LowT, Resistance Training, Placebo, HighT
Drug · Behavioral
Lead sponsor
University of Colorado, Denver
Other
Eligibility
60 Years and older · Male only
Enrollment
167 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2010
U.S. locations
1
States / cities
Denver, Colorado
Source: ClinicalTrials.gov public record
Updated Sep 1, 2020 · Synced Sep 23, 2026, 9:45 AM EDT
Completed Phase 2 Interventional Results available

To Evaluate the Efficacy and Safety of 1146A Nasal Spray in Adult Participants With Symptoms of Common Cold

NCT03005067
View directory record Official record
Conditions
Common Cold
Interventions
Carbomer 980 (1146A), Placebo
Drug · Other
Lead sponsor
GlaxoSmithKline
Industry
Eligibility
18 Years to 75 Years
Enrollment
171 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
24
States / cities
Birmingham, Alabama • Chandler, Arizona • Mesa, Arizona + 21 more
Source: ClinicalTrials.gov public record
Updated Jun 18, 2018 · Synced Sep 23, 2026, 9:45 AM EDT
Withdrawn Phase 1 Interventional Accepts healthy volunteers

Dapivirine Gel Rectal Safety and PK Study

NCT03044379
View directory record Official record
Conditions
HIV 1 Infection
Interventions
Dapivirine gel (0.05%), Universal HEC placebo gel
Drug · Other
Lead sponsor
International Partnership for Microbicides, Inc.
Industry
Eligibility
18 Years to 45 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 7, 2017 · Synced Sep 23, 2026, 9:45 AM EDT
Completed Phase 2 Interventional Results available

Topical NVN1000 for the Treatment of External Genital and Perianal Warts

NCT02462187
View directory record Official record
Conditions
Genital Warts, Perianal Warts
Interventions
NVN1000 8% Gel, NVN1000 16%, Vehicle, NVN1000 24%
Drug
Lead sponsor
Novan, Inc.
Industry
Eligibility
18 Years to 50 Years
Enrollment
108 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
15
States / cities
Fountain Valley, California • Lomita, California • San Diego, California + 11 more
Source: ClinicalTrials.gov public record
Updated Apr 5, 2023 · Synced Sep 23, 2026, 9:45 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Rectal Safety and Acceptability Study of Tenofovir 1% Gel

NCT01232803
View directory record Official record
Conditions
Rectal Microbicides
Interventions
Tenofovir 1% gel, 2% N-9 gel, HEC Placebo gel
Drug
Lead sponsor
CONRAD
Other
Eligibility
18 Years and older
Enrollment
65 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2011
U.S. locations
3
States / cities
Birmingham, Alabama • Boston, Massachusetts • Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jun 27, 2021 · Synced Sep 23, 2026, 9:45 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Effects of Oxybutynin Topical Gel on Gastric Emptying

NCT00926926
View directory record Official record
Conditions
Healthy
Interventions
Oxybutynin Chloride Gel, Placebo Gel
Drug
Lead sponsor
Watson Pharmaceuticals
Industry
Eligibility
18 Years and older · Female only
Enrollment
23 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009
U.S. locations
1
States / cities
Saint Charles, Missouri
Source: ClinicalTrials.gov public record
Updated Oct 7, 2012 · Synced Sep 23, 2026, 9:45 AM EDT
Completed Phase 1 Interventional

A Thorough ECG Study in Subjects With Acne Vulgaris Treated With SB204

NCT02581072
View directory record Official record
Conditions
Acne Vulgaris
Interventions
SB204 4%, SB204 8% or 12%, Vehicle
Drug
Lead sponsor
Novan, Inc.
Industry
Eligibility
18 Years to 70 Years
Enrollment
56 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2016
U.S. locations
1
States / cities
West Bend, Wisconsin
Source: ClinicalTrials.gov public record
Updated Nov 18, 2018 · Synced Sep 23, 2026, 9:45 AM EDT
Terminated Not applicable Interventional Accepts healthy volunteers Results available

Spectroscopic Imaging at 4T: A Drug Challenge Study

NCT01577706
View directory record Official record
Conditions
AOD Effects and Consequences
Interventions
Alprazolam, Dextroamphetamine, Placebo
Drug · Other
Lead sponsor
Mclean Hospital
Other
Eligibility
21 Years to 45 Years · Male only
Enrollment
7 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013
U.S. locations
1
States / cities
Belmont, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 3, 2017 · Synced Sep 23, 2026, 9:45 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

A Two-part Trial Assessing the Effects of 7α-methyl-19-nortestosterone (MENT) on Blood Pressure in Normal Men: an Open-label Pilot Study Followed by a Randomized, Double-blind, Placebo-controlled Study

NCT00812630
View directory record Official record
Conditions
Blood Pressure
Interventions
MENT or placebo
Drug
Lead sponsor
Population Council
Other
Eligibility
18 Years to 40 Years · Male only
Enrollment
68 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008 – 2014
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Aug 14, 2017 · Synced Sep 23, 2026, 9:45 AM EDT
Completed Phase 2 Interventional

The LUCINDA Trial: LeUprolide Plus Cholinesterase Inhibition to Reduce Neurological Decline in Alzheimer's

NCT03649724
View directory record Official record
Conditions
Alzheimer Disease, Mild Cognitive Impairment
Interventions
Placebo, Eligard 22.5Mg Suspension for Injection
Drug
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
60 Years to 120 Years · Female only
Enrollment
86 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2026
U.S. locations
3
States / cities
Boca Raton, Florida • New York, New York • Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Sep 20, 2026 · Synced Sep 23, 2026, 9:45 AM EDT
Completed Not applicable Interventional Results available

Study of Psychological and Motor Effects of Testosterone in Adolescents With XXY/Klinefelter Syndrome

NCT01585831
View directory record Official record
Conditions
Klinefelter Syndrome, XXY Syndrome
Interventions
Testosterone gel 1%, Placebo gel
Drug
Lead sponsor
University of Colorado, Denver
Other
Eligibility
8 Years to 18 Years · Male only
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2017
U.S. locations
1
States / cities
Aurora, Colorado
Source: ClinicalTrials.gov public record
Updated Aug 9, 2021 · Synced Sep 23, 2026, 9:45 AM EDT