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ClinicalTrials.gov public records Last synced Oct 8, 2026, 2:23 AM EDT

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Showing 25–48 of 51 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Placebo (for Doxycycline) Clear all
Completed Phase 2 Interventional Results available

Placebo Controlled Efficacy and Safety Study of CD2475/101 40 mg Tablets vs. Placebo and Doxycycline 100 mg Capsules Once Daily in the Treatment of Inflammatory Lesions of Acne Vulgaris

NCT01320033
View directory record Official record
Conditions
Acne Vulgaris
Interventions
CD2475/101 40 mg, Doxycycline 100 mg, Placebo
Drug
Lead sponsor
Galderma R&D
Industry
Eligibility
12 Years and older
Enrollment
662 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
31
States / cities
Hot Springs, Arkansas • Los Angeles, California • Denver, Colorado + 25 more
Source: ClinicalTrials.gov public record
Updated Feb 18, 2021 · Synced Oct 8, 2026, 2:23 AM EDT
Completed Phase 3 Interventional Results available

Management of Etonogestrel Subdermal Implant-related Bleeding

NCT01658995
View directory record Official record
Conditions
ESI-related Bleeding
Interventions
Doxycycline, Placebo
Drug
Lead sponsor
Petra M. Casey
Other
Eligibility
18 Years to 51 Years · Female only
Enrollment
82 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2019
U.S. locations
1
States / cities
Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jan 26, 2021 · Synced Oct 8, 2026, 2:23 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Cholera Anti-Secretory Treatment Trial

NCT04150250
View directory record Official record
Conditions
Cholera
Interventions
iOWH032, Placebo, V. cholerae Challenge, Antibiotics
Drug · Other
Lead sponsor
PATH
Other
Eligibility
18 Years to 44 Years
Enrollment
47 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 25, 2021 · Synced Oct 8, 2026, 2:23 AM EDT
Completed Phase 2 Interventional Results available

NGU: Doxycycline (Plus or Minus Tinidazole) Versus Azithromycin (Plus or Minus Tinidazole)

NCT00322465
View directory record Official record
Conditions
Urethritis
Interventions
Doxycycline, Placebo, Tinidazole, Azithromycin
Drug · Other
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
16 Years to 45 Years · Male only
Enrollment
305 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2009
U.S. locations
4
States / cities
Birmingham, Alabama • New Orleans, Louisiana • Baltimore, Maryland + 1 more
Source: ClinicalTrials.gov public record
Updated Aug 27, 2026 · Synced Oct 8, 2026, 2:23 AM EDT
Completed Phase 2 Interventional

Treating Periodontal Infection: Effects on Glycemic

NCT00016835
View directory record Official record
Conditions
Periodontal Disease, Diabetes Mellitus, Type 2
Interventions
Supra-gingival scaling and placebo, Subgingival scaling and metronidazole, Subgingival scaling and doxycycline
Procedure
Lead sponsor
University of Michigan
Other
Eligibility
18 Years and older
Enrollment
46 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2001 – 2004
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Jul 19, 2017 · Synced Oct 8, 2026, 2:23 AM EDT
Completed Phase 2 Interventional Results available

Spironolactone in Preventing Rash in Patients With Advanced Cancer Receiving Panitumumab and Cetuximab

NCT01867294
View directory record Official record
Conditions
Advanced Malignant Neoplasm, Dermatologic Complication
Interventions
Doxycycline, Management of Therapy Complications, Placebo, Questionnaire Administration, Spironolactone, Sunscreen, Therapeutic Hydrocortisone
Drug · Procedure · Other
Lead sponsor
Academic and Community Cancer Research United
Other
Eligibility
18 Years and older
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
5
States / cities
Urbana, Illinois • Des Moines, Iowa • Wichita, Kansas + 2 more
Source: ClinicalTrials.gov public record
Updated Jan 9, 2020 · Synced Oct 8, 2026, 2:23 AM EDT
Completed Phase 2 Interventional Results available

Effect of Three Periodontal Therapies in Current Smokers and Non-Smokers

NCT00066066
View directory record Official record
Conditions
Periodontitis, Periodontal Diseases
Interventions
Scaling and root planing, Metronidazole, Amoxicillin, Doxycycline
Procedure · Drug
Lead sponsor
The Forsyth Institute
Other
Eligibility
20 Years and older
Enrollment
146 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2009
U.S. locations
1
States / cities
Cambridge, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 22, 2013 · Synced Oct 8, 2026, 2:23 AM EDT
Terminated Phase 2 Interventional Results available

Safety and Efficacy of Doxycycline in Patients With Non-Ischemic Cardiomyopathy

NCT01935622
View directory record Official record
Conditions
Non-ischemic Cardiomyopathy, Systolic Heart Failure (NYHA II-III)
Interventions
Doxycycline, placebo
Drug
Lead sponsor
Virginia Commonwealth University
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
Richmond, Virginia
Source: ClinicalTrials.gov public record
Updated Aug 20, 2014 · Synced Oct 8, 2026, 2:23 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 8, 2026, 2:23 AM EDT
Completed Phase 2 Interventional Results available

Safety Study of Topical Doxycycline Gel for Adult Diabetic Lower Extremity Ulcers

NCT00764361
View directory record Official record
Conditions
Diabetic Foot Ulcer
Interventions
doxycycline, placebo gel
Drug
Lead sponsor
NanoSHIFT LLC
Industry
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
1
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Apr 7, 2017 · Synced Oct 8, 2026, 2:23 AM EDT
Completed Phase 2 Interventional

A Study of ALTY-0501 for the Treatment of Dry Eye Administered 4 Times a Day for a 56 Day Period

NCT00439400
View directory record Official record
Conditions
Dry Eye
Interventions
doxycycline, placebo
Drug
Lead sponsor
Alacrity Biosciences, Inc.
Industry
Eligibility
18 Years and older
Enrollment
160 participants
Timeline
2007
U.S. locations
1
States / cities
Andover, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 2, 2007 · Synced Oct 8, 2026, 2:23 AM EDT
Completed Not applicable Interventional Results available

Doxycycline for COPD in HIV-Infected Patients

NCT01744093
View directory record Official record
Conditions
HIV, Chronic Obstructive Pulmonary Disease (COPD), Emphysema
Interventions
Doxycycline, Placebo (sugar pill)
Drug
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
18 Years to 85 Years
Enrollment
61 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 21, 2022 · Synced Oct 8, 2026, 2:23 AM EDT
Completed Phase 4 Interventional

A Study of Doxycycline to Treat Chlamydial Infection

NCT05840159
View directory record Official record
Conditions
Chlamydial Infection
Interventions
Doxycycline, Placebo
Drug · Other
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
16 Years and older
Enrollment
526 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
5
States / cities
Birmingham, Alabama • Atlanta, Georgia • Rochester, New York + 1 more
Source: ClinicalTrials.gov public record
Updated Mar 27, 2026 · Synced Oct 8, 2026, 2:23 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 8, 2026, 2:23 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 8, 2026, 2:23 AM EDT
Active, not recruiting Phase 2 Interventional

Doxycycline for Emphysema in People Living With HIV (The DEPTH Trial)

NCT05382208
View directory record Official record
Conditions
Emphysema, HIV
Interventions
Doxycycline, Placebo
Drug
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
30 Years and older
Enrollment
133 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2027
U.S. locations
20
States / cities
Birmingham, Alabama • Los Angeles, California • San Diego, California + 17 more
Source: ClinicalTrials.gov public record
Updated Jan 26, 2026 · Synced Oct 8, 2026, 2:23 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 8, 2026, 2:23 AM EDT
Completed Not applicable Interventional Results available

Trial of Doxycycline to Reduce Sputum MMP-9 Activity in Adult Cystic Fibrosis (CF) Patients

NCT01112059
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
Doxycycline, placebo
Drug · Other
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
19 Years and older
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2012
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Mar 6, 2017 · Synced Oct 8, 2026, 2:23 AM EDT
Completed Phase 2 Interventional Results available

Treatment of Patients With Blepharitis and Facial Rosacea

NCT00560703
View directory record Official record
Conditions
Blepharitis, Meibomianitis, Dry Eye
Interventions
COL-101 (doxycycline, USP) capsules, placebo
Drug
Lead sponsor
Galderma R&D
Industry
Eligibility
18 Years and older
Enrollment
70 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2009
U.S. locations
8
States / cities
Little Rock, Arkansas • Naples, Florida • Louisville, Kentucky + 5 more
Source: ClinicalTrials.gov public record
Updated Feb 18, 2021 · Synced Oct 8, 2026, 2:23 AM EDT
Completed Phase 3 Interventional

Effects of Low-Dose Doxycycline on Oral Bone Loss

NCT00066027
View directory record Official record
Conditions
Periodontitis
Interventions
20 mg doxycycline hyclate, Placebo
Drug
Lead sponsor
University of Nebraska
Other
Eligibility
45 Years to 70 Years · Female only
Enrollment
128 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2002 – 2005
U.S. locations
2
States / cities
Lincoln, Nebraska • Stony Brook, New York
Source: ClinicalTrials.gov public record
Updated Sep 6, 2023 · Synced Oct 8, 2026, 2:23 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

A Randomized Controlled Trial of Three Antibiotic Regimens for First Trimester Abortions

NCT02756403
View directory record Official record
Conditions
First Trimester Abortion
Interventions
Azithromycin, Doxycycline, Metronidazole, Placebo
Drug
Lead sponsor
Medstar Health Research Institute
Other
Eligibility
18 Years and older · Female only
Enrollment
181 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
2
States / cities
Washington D.C., District of Columbia • Silver Spring, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 11, 2022 · Synced Oct 8, 2026, 2:23 AM EDT
Completed Phase 3 Interventional Results available

Combination Antibiotic Treatment for Reactive Arthritis Caused by Chlamydia Bacteria

NCT00351273
View directory record Official record
Conditions
Arthritis, Reactive, Reiter Disease
Interventions
Doxycycline and Rifampin, Azithromycin and Rifampin, Placebo
Drug
Lead sponsor
University of South Florida
Other
Eligibility
18 Years to 70 Years
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
2
States / cities
Tampa, Florida • New Orleans, Louisiana
Source: ClinicalTrials.gov public record
Updated Nov 13, 2018 · Synced Oct 8, 2026, 2:23 AM EDT
Withdrawn Not applicable Interventional

Trial of the Use of Doxycycline After Rotator Cuff Repair

NCT02388477
View directory record Official record
Conditions
Rotator Cuff Injury
Interventions
Doxycycline, sugar pill
Drug
Lead sponsor
Milton S. Hershey Medical Center
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
U.S. locations
1
States / cities
Hershey, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 9, 2016 · Synced Oct 8, 2026, 2:23 AM EDT
Withdrawn Not applicable Interventional

Study of NanoDOX Hydrogel vs Placebo for Dehisced Surgical Wounds

NCT01547325
View directory record Official record
Conditions
Dehisced Surgical Wounds
Interventions
NanoDOX 1% doxycycline monohydrate Hydrogel, placebo hydrogel
Drug
Lead sponsor
NanoSHIFT LLC
Industry
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2013
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 13, 2017 · Synced Oct 8, 2026, 2:23 AM EDT