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ClinicalTrials.gov public records Last synced Oct 4, 2026, 10:09 AM EDT

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Showing 25–48 of 119 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Placebo (Tetracycline) Clear all
Terminated Phase 1 Interventional Accepts healthy volunteers

Ph1 Study of Valortim and Doxycycline in Humans

NCT00964834
View directory record Official record
Conditions
Anthrax
Interventions
Doxycycline and Valortim, Placebo Antibiotic and Valortim, Placebo Antibiotic and Placebo Valortim
Drug
Lead sponsor
PharmAthene, Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009
U.S. locations
1
States / cities
Overland Park, Kansas
Source: ClinicalTrials.gov public record
Updated Aug 10, 2010 · Synced Oct 4, 2026, 10:09 AM EDT
Withdrawn Phase 2 Interventional

A Study of the Effects of Minocycline on Cognitive Function After Carotid Endarterectomy

NCT00401921
View directory record Official record
Conditions
Carotid Stenosis
Interventions
Minocycline, Placebo oral capsule
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 90 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2010
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 14, 2017 · Synced Oct 4, 2026, 10:09 AM EDT
Completed Phase 3 Interventional

Doxycycline and OA Progression

NCT00000403
View directory record Official record
Conditions
Osteoarthritis
Interventions
Doxycycline
Drug
Lead sponsor
Indiana University
Other
Eligibility
45 Years to 64 Years · Female only
Enrollment
432 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1996 – 2001
U.S. locations
6
States / cities
Birmingham, Alabama • Tucson, Arizona • Chicago, Illinois + 3 more
Source: ClinicalTrials.gov public record
Updated Apr 30, 2013 · Synced Oct 4, 2026, 10:09 AM EDT
Completed Phase 3 Interventional Results available

A Study to Assess the Safety, Efficacy and Tolerability of Oral DFD-29 Capsules for the Treatment of Rosacea (MVOR-2)

NCT05343455
View directory record Official record
Conditions
Papulopustular Rosacea
Interventions
DFD-29, Doxycycline, Placebo
Drug
Lead sponsor
Journey Medical Corporation
Industry
Eligibility
18 Years and older
Enrollment
330 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
15
States / cities
Santa Monica, California • Doral, Florida • Miami, Florida + 11 more
Source: ClinicalTrials.gov public record
Updated Dec 3, 2024 · Synced Oct 4, 2026, 10:09 AM EDT
Completed Phase 2 Interventional Results available

Minocycline Hydrochloride in Reducing Chemotherapy Induced Depression and Anxiety in Patients With Stage I-III Breast Cancer

NCT02203552
View directory record Official record
Conditions
Anxiety Disorder, Depression, Recurrent Breast Cancer, Stage IA Breast Cancer, Stage IB Breast Cancer, Stage II Breast Cancer, Stage IIIA Breast Cancer, Stage IIIB Breast Cancer, Stage IIIC Breast Cancer
Interventions
minocycline hydrochloride, placebo, laboratory biomarker analysis, Questionnaire administration
Drug · Other
Lead sponsor
Ohio State University Comprehensive Cancer Center
Other
Eligibility
18 Years and older · Female only
Enrollment
56 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2020
U.S. locations
1
States / cities
Columbus, Ohio
Source: ClinicalTrials.gov public record
Updated Jan 8, 2025 · Synced Oct 4, 2026, 10:09 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Brain and Stress Study

NCT06044090
View directory record Official record
Conditions
Stress, Psychological, Motivation
Interventions
Minocycline, Placebo
Drug
Lead sponsor
University of North Carolina, Chapel Hill
Other
Eligibility
25 Years to 60 Years
Enrollment
10 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2023
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Dec 18, 2024 · Synced Oct 4, 2026, 10:09 AM EDT
Completed Phase 4 Interventional Results available

Minocycline and Tobacco Craving in Smokers With Schizophrenia

NCT02968602
View directory record Official record
Conditions
Schizophrenia, Tobacco Use
Interventions
Minocycline, Placebo
Drug · Other
Lead sponsor
University of Maryland, Baltimore
Other
Eligibility
18 Years to 65 Years
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Catonsville, Maryland
Source: ClinicalTrials.gov public record
Updated Jan 6, 2022 · Synced Oct 4, 2026, 10:09 AM EDT
Completed Phase 2 Interventional Results available

Minocycline Study in Pancreatic Cancer Patients

NCT01693523
View directory record Official record
Conditions
Pancreatic Cancer
Interventions
Minocycline, Placebo, Questionnaires
Drug · Other · Behavioral
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2018
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Mar 9, 2020 · Synced Oct 4, 2026, 10:09 AM EDT
Not listed Not applicable Interventional

Supplemental Adjuvants for Intracellular Nutrition and Treatment

NCT00893724
View directory record Official record
Conditions
Neovascular Age-related Macular Degeneration, Diabetic Macular Edema
Interventions
Neutral pills with no medicinal effect, Inosine; Tocopherols, Tocotrienol, CoQ10 combination capsule; Niacinamide SR; Viatmin C; N-acetyl Cysteine; Complete Multivitamin with all minerals, Inosine; Tocopherol, Tocotrienol, CoQ10 combination capsule; Niacinamide; Vitamin C; N-acetyl Cysteine; Complete Multivitamin with all minerals; Minocycline
Drug · Dietary Supplement
Lead sponsor
Mid-Atlantic Retina Consultations, Inc.
Other
Eligibility
Not listed
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2011
U.S. locations
1
States / cities
Morgantown, West Virginia
Source: ClinicalTrials.gov public record
Updated Jul 20, 2011 · Synced Oct 4, 2026, 10:09 AM EDT
Terminated Phase 2 Interventional Results available

Minocycline for the Treatment of Decreased Mental Function in HIV-Infected Adults

NCT00361257
View directory record Official record
Conditions
HIV Infections
Interventions
Minocycline, Placebo (Tetracycline)
Drug
Lead sponsor
Advancing Clinical Therapeutics Globally for HIV/AIDS and Other Infections
Network
Eligibility
18 Years to 65 Years
Enrollment
107 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2010
U.S. locations
16
States / cities
Los Angeles, California • San Diego, California • Denver, Colorado + 13 more
Source: ClinicalTrials.gov public record
Updated Feb 5, 2016 · Synced Oct 4, 2026, 10:09 AM EDT
Completed Phase 2Phase 3 Interventional

Clinical Study to Evaluate Treatment With ORACEA® for Geographic Atrophy (TOGA)

NCT01782989
View directory record Official record
Conditions
Geographic Atrophy
Interventions
ORACEA®, Placebo
Drug
Lead sponsor
Paul Yates, MD, PhD
Other
Eligibility
55 Years and older
Enrollment
286 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2020
U.S. locations
37
States / cities
Glendale, California • Poway, California • Golden, Colorado + 31 more
Source: ClinicalTrials.gov public record
Updated Nov 4, 2022 · Synced Oct 4, 2026, 10:09 AM EDT
Terminated Phase 2 Interventional Results available

Doxycycline in Treating Patients With Chronic Rhinosinusitis With Nasal Polyps

NCT02569437
View directory record Official record
Conditions
Polyp of Nasal Sinus
Interventions
Doxycycline, methylprednisolone, nasal saline spray, Flonase, sugar pill
Drug
Lead sponsor
Icahn School of Medicine at Mount Sinai
Other
Eligibility
18 Years and older
Enrollment
49 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2016
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 9, 2018 · Synced Oct 4, 2026, 10:09 AM EDT
Completed Phase 3 Interventional Results available

Mycoplasma Genitalium Antibiotic Susceptibility and Treatment (MEGA)

NCT00358462
View directory record Official record
Conditions
Urethritis
Interventions
Azithromycin, Doxycycline
Drug
Lead sponsor
University of Washington
Other
Eligibility
16 Years and older · Male only
Enrollment
606 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2011
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Aug 15, 2018 · Synced Oct 4, 2026, 10:09 AM 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 24, 2026 · Synced Oct 4, 2026, 10:09 AM EDT
Completed Phase 2 Interventional

Short and Long Term Outcomes of Doxycycline Versus Trimethoprim-Sulfamethoxazole for Skin and Soft Tissue Infections Treatment

NCT03637400
View directory record Official record
Conditions
Methicillin-resistant Staphylococcus Aureus, Skin Infection
Interventions
TMP-SMX, DOXY
Drug
Lead sponsor
Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center
Other
Eligibility
9 Years to 85 Years
Enrollment
269 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2025
U.S. locations
3
States / cities
Sylmar, California • Torrance, California • St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Dec 4, 2025 · Synced Oct 4, 2026, 10:09 AM EDT
Completed Phase 2 Interventional Results available

Study Of Dacomitinib (PF-00299804) In Advanced NSCLC Patients (Post Chemo Or Select First Line) To Evaluate Prophylactic Intervention On Derm And GI AEs And PRO

NCT01465802
View directory record Official record
Conditions
Non Small Cell Lung Cancer (NSCLC)
Interventions
Dacomitinib, Doxycycline, Probiotic, Alclometasone cream
Drug
Lead sponsor
Pfizer
Industry
Eligibility
18 Years and older
Enrollment
236 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
79
States / cities
Duarte, California • Fullerton, California • Irvine, California + 49 more
Source: ClinicalTrials.gov public record
Updated Jan 9, 2019 · Synced Oct 4, 2026, 10:09 AM EDT
Completed Phase 4 Interventional Results available

Evaluation of Relapse, Efficacy and Safety of Long-term Treatment With Oracea® vs Placebo

NCT01426269
View directory record Official record
Conditions
Rosacea
Interventions
Doxycycline, Metronidazole, Placebo
Drug
Lead sponsor
Galderma R&D
Industry
Eligibility
18 Years to 80 Years
Enrollment
235 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2013
U.S. locations
11
States / cities
Santa Monica, California • Coral Gables, Florida • Corbin, Kentucky + 8 more
Source: ClinicalTrials.gov public record
Updated Aug 1, 2022 · Synced Oct 4, 2026, 10:09 AM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

Effects of Treatments on Atopic Dermatitis

NCT01631617
View directory record Official record
Conditions
Eczema, Dermatitis, Skin Diseases, Genetic, Dermatitis, Atopic, Skin Diseases
Interventions
Trimethoprim/sulfamethoxazole (TMP/SMZ), Cephalexin, Doxycycline, Sodium hypochlorite, Placebo capsules, Placebo Sodium hypochlorite
Drug · Other
Lead sponsor
National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)
NIH
Eligibility
2 Years to 50 Years
Enrollment
130 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2027
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 28, 2026 · Synced Oct 4, 2026, 10:09 AM EDT
Completed Phase 4 Interventional

Ocular Rosacea Biome Study

NCT05296837
View directory record Official record
Conditions
Ocular Rosacea, Antimicrobial Resistance
Interventions
Doxycycline 40 MG ( 20mg twice daily), Doxycycline 200 MG ( 100 mg twice daily), Placebo
Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
46 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Aug 20, 2026 · Synced Oct 4, 2026, 10:09 AM EDT
Completed Phase 4 Interventional Results available

A Study to Compare Efficacy and Safety of Trifarotene Cream When Used With an Oral Antibiotic for the Treatment of Severe Acne Vulgaris (AV)

NCT04451330
View directory record Official record
Conditions
Acne Vulgaris
Interventions
Trifarotene cream, Doxycycline hyclate, Trifarotene Vehicle, Doxycycline Placebo
Drug
Lead sponsor
Galderma R&D
Industry
Eligibility
12 Years and older
Enrollment
202 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
25
States / cities
Fort Smith, Arkansas • Hot Springs, Arkansas • Rogers, Arkansas + 21 more
Source: ClinicalTrials.gov public record
Updated May 10, 2022 · Synced Oct 4, 2026, 10:09 AM EDT
Completed Phase 1 Interventional

Minocycline's Effects on Alcohol Responses in Humans

NCT02187211
View directory record Official record
Conditions
Alcohol Dependence
Interventions
Minocycline, Placebo (for Minocycline)
Drug
Lead sponsor
Yale University
Other
Eligibility
21 Years to 50 Years
Enrollment
54 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2018
U.S. locations
1
States / cities
West Haven, Connecticut
Source: ClinicalTrials.gov public record
Updated Mar 9, 2020 · Synced Oct 4, 2026, 10:09 AM EDT
Completed Phase 1Phase 2 Interventional Results available

Minocycline to Treat Central Retinal Vein Occlusion

NCT01468844
View directory record Official record
Conditions
Retinal Vein Occlusion
Interventions
Minocycline, Placebo, Bevacizumab
Drug
Lead sponsor
National Eye Institute (NEI)
NIH
Eligibility
18 Years and older
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2015
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 17, 2021 · Synced Oct 4, 2026, 10:09 AM EDT
Not listed Phase 4 Interventional

An Outpatient Clinical Trial Using Ivermectin and Doxycycline in COVID-19 Positive Patients at High Risk to Prevent COVID-19 Related Hospitalization

NCT04729140
View directory record Official record
Conditions
Covid19
Interventions
Ivermectin Tablets, Doxycycline Tablets, Placebo
Drug
Lead sponsor
Max Health, Subsero Health
Other
Eligibility
18 Years and older
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Sarasota, Florida
Source: ClinicalTrials.gov public record
Updated Apr 1, 2021 · Synced Oct 4, 2026, 10:09 AM EDT
Completed Phase 3 Interventional Results available

A Randomized, Double-Blind Study to Assess the Safety, Efficacy and Tolerability of Oral DFD-29 Capsules for the Treatment of Rosacea.

NCT05296629
View directory record Official record
Conditions
Papulopustular Rosacea
Interventions
DFD-29, Doxycycline, Placebo
Drug
Lead sponsor
Journey Medical Corporation
Industry
Eligibility
18 Years and older
Enrollment
323 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
27
States / cities
Rogers, Arkansas • Cerritos, California • Fremont, California + 21 more
Source: ClinicalTrials.gov public record
Updated Dec 3, 2024 · Synced Oct 4, 2026, 10:09 AM EDT