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ClinicalTrials.gov public records Last synced Oct 20, 2026, 4:10 PM EDT

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Showing 1–24 of 174 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Doxycycline Hyclate Clear all
Recruiting Phase 4 Interventional

Treatment Results for Patients With Central Centrifugal Cicatricial Alopecia (CCCA): a Multicenter Prospective Study

NCT04207931
View directory record Official record
Conditions
Central Centrifugal Cicatricial Alopecia (CCCA)
Interventions
Topical steroid class I-II, Triamcinolone Acetonide, Doxycyline, Minoxidil
Drug
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years to 60 Years · Female only
Enrollment
250 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2027
U.S. locations
1
States / cities
Winston-Salem, North Carolina
Source: ClinicalTrials.gov public record
Updated Mar 31, 2026 · Synced Oct 20, 2026, 4:10 PM EDT
Completed Phase 2 Interventional Results available

Evaluation of Doxycycline Verses Placebo for the Treatment of Severe Nonproliferative or Mild or Moderate Proliferative Diabetic Retinopathy

NCT00511875
View directory record Official record
Conditions
Diabetic Retinopathy
Interventions
doxycycline monohydrate, placebo
Drug
Lead sponsor
Thomas Gardner
Other
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2012
U.S. locations
1
States / cities
Hershey, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Nov 2, 2018 · Synced Oct 20, 2026, 4:10 PM EDT
Completed Phase 4 Interventional Results available

Trial of Azithromycin vs. Doxycycline for the Treatment of Rectal Chlamydia in MSM

NCT03608774
View directory record Official record
Conditions
Anal Chlamydia Infection
Interventions
Azithromycin, Doxycycline, Placebo
Drug · Other
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 99 Years · Male only
Enrollment
177 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
2
States / cities
Boston, Massachusetts • Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jan 7, 2021 · Synced Oct 20, 2026, 4:10 PM 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 20, 2026, 4:10 PM EDT
Terminated Phase 3 Interventional Results available

CleanUP IPF for the Pulmonary Trials Cooperative

NCT02759120
View directory record Official record
Conditions
Idiopathic Pulmonary Fibrosis
Interventions
Antimicrobial therapy: Co-trimoxazole or Doxycycline, No Intervention: Standard of Care
Drug · Other
Lead sponsor
Weill Medical College of Cornell University
Other
Eligibility
40 Years and older
Enrollment
513 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
31
States / cities
Birmingham, Alabama • Tucson, Arizona • Sacramento, California + 22 more
Source: ClinicalTrials.gov public record
Updated Apr 8, 2021 · Synced Oct 20, 2026, 4:10 PM EDT
Not listed Phase 2 Interventional Accepts healthy volunteers

Assessment of Suppression of Cutaneous Allergic Responses and Pruritus by Topical Doxycycline

NCT03968562
View directory record Official record
Conditions
Hives
Interventions
2% Doxycycline Cream in Generic Aquaphor or Generic Aquaphor
Drug
Lead sponsor
State University of New York - Downstate Medical Center
Other
Eligibility
18 Years to 75 Years
Enrollment
25 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
1
States / cities
Brooklyn, New York
Source: ClinicalTrials.gov public record
Updated Oct 14, 2021 · Synced Oct 20, 2026, 4:10 PM EDT
Recruiting Phase 2 Interventional

Doxycycline Use in Post-Operative Seromas

NCT07498010
View directory record Official record
Conditions
Seroma
Interventions
Doxycycline
Drug
Lead sponsor
University of Miami
Other
Eligibility
18 Years and older
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2027
U.S. locations
1
States / cities
Coral Gables, Florida
Source: ClinicalTrials.gov public record
Updated Jul 9, 2026 · Synced Oct 20, 2026, 4:10 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Aczone 5% Gel as Maintenance Treatment of Acne Vulgaris Following Completion of Oral Doxycycline and Aczone 5% Gel

NCT01885910
View directory record Official record
Conditions
Acne Vulgaris
Interventions
Doxycycline 100mg, Aczone 5% gel
Drug
Lead sponsor
Derm Research, PLLC
Other
Eligibility
12 Years to 85 Years
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Louisville, Kentucky
Source: ClinicalTrials.gov public record
Updated Feb 27, 2015 · Synced Oct 20, 2026, 4:10 PM 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 20, 2026, 4:10 PM EDT
Active, not recruiting Early Phase 1 Interventional

Collaborative Urological Prosthetics Investigation Directive Research Group

NCT05100654
View directory record Official record
Conditions
Erectile Dysfunction, Penile Prosthesis Infection
Interventions
Doxycycline, Ciprofloxacin, Augmentin, Bactrim
Drug
Lead sponsor
University of Chicago
Other
Eligibility
35 Years to 90 Years · Male only
Enrollment
800 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2028
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Feb 2, 2026 · Synced Oct 20, 2026, 4:10 PM 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 20, 2026, 4:10 PM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

Determine the Effect of Administering Periostat(R) Twice Daily on Patients With Acne Rosacea

NCT00041977
View directory record Official record
Conditions
Acne Rosacea
Interventions
doxycycline hyclate 20 mg twice daily
Drug
Lead sponsor
CollaGenex Pharmaceuticals
Industry
Eligibility
18 Years and older
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
Started 2002
U.S. locations
7
States / cities
Gainesville, Florida • Miami, Florida • West Palm Beach, Florida + 4 more
Source: ClinicalTrials.gov public record
Updated Jun 24, 2005 · Synced Oct 20, 2026, 4:10 PM 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 20, 2026, 4:10 PM EDT
Completed Phase 3 Interventional Results available

D-PLEX 312 - Safety and Efficacy of D-PLEX in the Prevention of Post Abdominal Surgery Incisional Infection (SHIELD II)

NCT04411199
View directory record Official record
Conditions
Surgical Site Infection, Colon Surgery, Abdominal Surgery, Post-Op Infection
Interventions
D-PLEX, Standard of Care (SoC)
Drug · Other
Lead sponsor
PolyPid Ltd.
Industry
Eligibility
18 Years to 99 Years
Enrollment
975 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2025
U.S. locations
5
States / cities
Augusta, Georgia • New Orleans, Louisiana • St Louis, Missouri + 2 more
Source: ClinicalTrials.gov public record
Updated Jul 13, 2026 · Synced Oct 20, 2026, 4:10 PM EDT
Not listed Early Phase 1 Interventional

CTCL Directed Therapy

NCT03116659
View directory record Official record
Conditions
Lymphoma, T-Cell, Cutaneous
Interventions
Doxycycline, Imiquimod
Drug
Lead sponsor
James J. Peters Veterans Affairs Medical Center
Federal
Eligibility
30 Years to 89 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2020
U.S. locations
1
States / cities
The Bronx, New York
Source: ClinicalTrials.gov public record
Updated Aug 13, 2019 · Synced Oct 20, 2026, 4:10 PM 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 20, 2026, 4:10 PM EDT
Completed Phase 3 Interventional Results available

D-PLEX 311: Safety and Efficacy of D-PLEX in the Prevention of Post Abdominal Surgery Incisional Infection

NCT04233424
View directory record Official record
Conditions
Surgical Site Infection, Colon Surgery, Abdominal Surgery, Post-Op Infection
Interventions
D-PLEX, Standard of Care (SoC)
Drug
Lead sponsor
PolyPid Ltd.
Industry
Eligibility
18 Years to 99 Years
Enrollment
977 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
5
States / cities
Sheffield, Alabama • Los Angeles, California • Redding, California + 2 more
Source: ClinicalTrials.gov public record
Updated Apr 21, 2026 · Synced Oct 20, 2026, 4:10 PM EDT
Completed Phase 4 Interventional Results available

ORCA - Oracea® for Rosacea: A Community-based Assessment

NCT00892281
View directory record Official record
Conditions
Rosacea
Interventions
doxycycline (Oracea®) 40 mg modified release as monotherapy, doxycycline (Oracea®) 40 mg modified release as add-on therapy
Drug
Lead sponsor
Galderma R&D
Industry
Eligibility
18 Years and older
Enrollment
1,421 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009
U.S. locations
1
States / cities
Lexington, Kentucky
Source: ClinicalTrials.gov public record
Updated Aug 25, 2022 · Synced Oct 20, 2026, 4:10 PM EDT
Completed Phase 4 Interventional

Doxycycline Effects on Inflammation in Cystic Fibrosis

NCT01323101
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
Doxycycline, No doxycycline
Drug · Other
Lead sponsor
University of Southern California
Other
Eligibility
18 Years and older
Enrollment
21 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2010
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Mar 30, 2017 · Synced Oct 20, 2026, 4:10 PM EDT
Withdrawn Phase 2 Interventional

RepurpoSing Old Drugs TO SuppRess a Modern Threat: COVID-19 STORM

NCT04433078
View directory record Official record
Conditions
Cytokine Storm, SARS-CoV-2
Interventions
Doxycycline, Placebo
Drug
Lead sponsor
Temple University
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 19, 2021 · Synced Oct 20, 2026, 4:10 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Safety and Efficacy Study to Compare Two Rosacea Treatment Regimens

NCT00495313
View directory record Official record
Conditions
Rosacea
Interventions
doxycycline
Drug
Lead sponsor
CollaGenex Pharmaceuticals
Industry
Eligibility
18 Years and older
Enrollment
91 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007
U.S. locations
7
States / cities
Omaha, Nebraska • Las Vegas, Nevada • Arlington, Texas + 4 more
Source: ClinicalTrials.gov public record
Updated Dec 16, 2008 · Synced Oct 20, 2026, 4:10 PM EDT
Recruiting Phase 4 Interventional

Doxycycline Prophylaxis for Prevention of Sexually Transmitted Infections

NCT06738407
View directory record Official record
Conditions
Gonorrhea, Chlamydia, Syphilis, Sexually Transmitted Infections (STIs)
Interventions
Doxycycline hyclate delayed released 200 mg, Doxycycline hyclate delayed released 200 mg weekly, Per standard of care with quarterly STI testing/treatment and sexual health counseling
Drug · Other
Lead sponsor
Westat
Other
Eligibility
13 Years to 29 Years · Female only
Enrollment
760 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2029
U.S. locations
13
States / cities
Los Angeles, California • San Francisco, California • Washington D.C., District of Columbia + 10 more
Source: ClinicalTrials.gov public record
Updated Oct 16, 2026 · Synced Oct 20, 2026, 4:10 PM EDT
Completed No phase listed Observational

Monitoring of Early Disease Progression in Hereditary Transthyretin Amyloidosis

NCT03431896
View directory record Official record
Conditions
Amyloidosis, Amyloid, Amyloid Neuropathies, Familial, Amyloid Cardiomyopathy, Amyloid - Primary, Transthyretin Amyloidosis, AL Amyloidosis
Interventions
Not listed
Lead sponsor
The Cleveland Clinic
Other
Eligibility
Not listed
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2026
U.S. locations
1
States / cities
Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Mar 12, 2026 · Synced Oct 20, 2026, 4:10 PM EDT
Recruiting Phase 4 Interventional Accepts healthy volunteers

Got Doxy- 'Flipping the Script' on STI PEP

NCT07215325
View directory record Official record
Conditions
Sexually Transmitted Infections (STI)
Interventions
Doxycycline monohydrate 200 mg, Observation
Drug · Other
Lead sponsor
Emory University
Other
Eligibility
18 Years and older · Male only
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2029
U.S. locations
2
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Apr 30, 2026 · Synced Oct 20, 2026, 4:10 PM EDT