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ClinicalTrials.gov public records Last synced Oct 7, 2026, 4:48 AM EDT

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Showing 49–72 of 82 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Oral doxycycline hyclate Clear all
Terminated Early Phase 1 Interventional

Patients Response to Early Switch To Oral:Osteomyelitis Study

NCT02099240
View directory record Official record
Conditions
Osteomyelitis
Interventions
oral antibiotics, intravenous antibiotics
Drug · Procedure
Lead sponsor
Julio Ramirez
Other
Eligibility
18 Years to 100 Years
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
1
States / cities
Louisville, Kentucky
Source: ClinicalTrials.gov public record
Updated Apr 6, 2021 · Synced Oct 7, 2026, 4:48 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Doxycycline Monohydrate 25 mg (5mL) Oral Suspension Under Fed Conditions

NCT00829790
View directory record Official record
Conditions
Healthy
Interventions
Doxycycline Monohydrate
Drug
Lead sponsor
Teva Pharmaceuticals USA
Industry
Eligibility
18 Years and older
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2006
U.S. locations
1
States / cities
San Antonio, Texas
Source: ClinicalTrials.gov public record
Updated Aug 19, 2024 · Synced Oct 7, 2026, 4:48 AM EDT
Terminated Phase 2 Interventional Results available

Metformin Hydrochloride and Doxycycline in Treating Patients With Head and Neck Squamous Cell Carcinoma

NCT03076281
View directory record Official record
Conditions
Larynx, LIP, Oral Cavity, Pharynx
Interventions
Metformin Hydrochloride, Doxycycline, Metformin +Doxycycline
Drug
Lead sponsor
Sidney Kimmel Comprehensive Cancer Center at Thomas Jefferson University
Other
Eligibility
18 Years and older
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 29, 2026 · Synced Oct 7, 2026, 4:48 AM EDT
Active, not recruiting Early Phase 1 Interventional Accepts healthy volunteers

Analysis of the Microbiome in Rosacea

NCT04108897
View directory record Official record
Conditions
Rosacea
Interventions
Doxycycline, Ivermectin Topical
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 99 Years
Enrollment
150 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2027
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 8, 2026 · Synced Oct 7, 2026, 4:48 AM EDT
Not listed Phase 3 Interventional Accepts healthy volunteers

Or v IV Antibiotics for Infection

NCT04723940
View directory record Official record
Conditions
Joint Infection
Interventions
Bactrim, Cefadroxil, Doxycycline Hcl, Clindamycin
Drug
Lead sponsor
Rothman Institute Orthopaedics
Other
Eligibility
18 Years and older
Enrollment
308 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2021 – 2023
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jan 26, 2021 · Synced Oct 7, 2026, 4:48 AM EDT
Completed Phase 3 Interventional Results available

Study of Prophylactic Topical Dapsone 5% Gel Versus Moisturizer for Cetuximab-induced Papulopustular (Acneiform) Rash in Patients With mCRC or HNSCC Without Previous or Concurrent RT

NCT01931150
View directory record Official record
Conditions
Cetuximab-induced Papulopustular (Acneiform) Rash Who Have, Metastatic Colorectal Cancer or Head and Neck Squamous Cell Carcinoma
Interventions
Topical Dapsone 5% Gel, Moisturizer, oral antibiotics
Drug · Other
Lead sponsor
Memorial Sloan Kettering Cancer Center
Other
Eligibility
18 Years and older
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 13, 2017 · Synced Oct 7, 2026, 4:48 AM EDT
Completed Phase 4 Interventional Results available

Evaluation of Rosacea-related Inflammatory Biochemical Markers in Adult Skin When Treated With Oracea® vs Placebo

NCT01308619
View directory record Official record
Conditions
Rosacea
Interventions
Doxycycline, Placebo
Drug · Other
Lead sponsor
Galderma R&D
Industry
Eligibility
18 Years to 70 Years
Enrollment
170 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
10
States / cities
Hot Springs, Arkansas • San Diego, California • Evansville, Indiana + 7 more
Source: ClinicalTrials.gov public record
Updated Aug 1, 2022 · Synced Oct 7, 2026, 4:48 AM EDT
Completed Phase 4 Interventional Results available

Patient Centered Outcomes in Rosacea: An Exploratory Multi-media Analysis of the Patient Experience on Oracea

NCT01872715
View directory record Official record
Conditions
Papulopustular Rosacea
Interventions
Oracea
Drug
Lead sponsor
Galderma R&D
Industry
Eligibility
25 Years to 70 Years
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013
U.S. locations
1
States / cities
Carrollton, Texas
Source: ClinicalTrials.gov public record
Updated Aug 23, 2022 · Synced Oct 7, 2026, 4:48 AM EDT
Completed Phase 1 Interventional

A Trial of Doxycycline in Renal Disease

NCT02753426
View directory record Official record
Conditions
Chronic Kidney Disease, Cardiorenal Syndrome
Interventions
Doxycycline, Placebo (for Doxycycline)
Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
11 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Feb 6, 2020 · Synced Oct 7, 2026, 4:48 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 7, 2026, 4:48 AM EDT
Recruiting Early Phase 1 Interventional Accepts healthy volunteers

Weekly Isotretinoin vs Tetracycline for Moderate Acne

NCT06225570
View directory record Official record
Conditions
Acne Vulgaris
Interventions
Isotretinoin, Tetracycline
Drug
Lead sponsor
Medical University of South Carolina
Other
Eligibility
12 Years and older
Enrollment
50 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2025 – 2027
U.S. locations
1
States / cities
Charleston, South Carolina
Source: ClinicalTrials.gov public record
Updated May 18, 2026 · Synced Oct 7, 2026, 4:48 AM EDT
Completed Phase 2 Interventional Results available

Treatment of Moderate to Severe Facial Acne Vulgaris

NCT00612573
View directory record Official record
Conditions
Acne Vulgaris
Interventions
Doxycycline 0.6 mg/kg/day, Doxycycline 1.2 mg/kg/day, Doxycycline 2.4 mg/kg/day, Placebo
Drug
Lead sponsor
Warner Chilcott
Industry
Eligibility
12 Years to 45 Years
Enrollment
257 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008
U.S. locations
23
States / cities
Encino, California • Fremont, California • Los Angeles, California + 20 more
Source: ClinicalTrials.gov public record
Updated Apr 22, 2013 · Synced Oct 7, 2026, 4:48 AM EDT
Not listed Phase 3 Interventional Accepts healthy volunteers

Prospective Evaluation of Oral Antibiotics for Treatment of Shoulder PJI

NCT04636125
View directory record Official record
Conditions
Periprosthetic Infection, Oral Antibiotics, Revision Total Shoulder Arthroplasty
Interventions
Doxycycline 100 MG Oral Tablet
Drug
Lead sponsor
Rothman Institute Orthopaedics
Other
Eligibility
18 Years and older
Enrollment
100 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2021
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Nov 19, 2020 · Synced Oct 7, 2026, 4:48 AM EDT
Completed Phase 2 Interventional Results available

The Importance of Anti-anaerobic Therapy for Acute Pelvic Inflammatory Disease (PID)

NCT01160640
View directory record Official record
Conditions
Pelvic Inflammatory Disease
Interventions
Ceftriaxone, Doxycycline, Metronidazole, Placebo Oral Capsule
Drug
Lead sponsor
Harold Wiesenfeld
Other
Eligibility
15 Years to 40 Years · Female only
Enrollment
233 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2015
U.S. locations
3
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Jul 10, 2018 · Synced Oct 7, 2026, 4:48 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Evaluation of Doxycycline Post-exposure Prophylaxis to Reduce Sexually Transmitted Infections in PrEP Users and HIV-infected Men Who Have Sex With Men

NCT03980223
View directory record Official record
Conditions
Gonorrhea, Chlamydia, Syphilis
Interventions
Doxycycline Hyclate Delayed-Release 200 mg
Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older · Male only
Enrollment
641 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2023
U.S. locations
3
States / cities
San Francisco, California • Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jul 12, 2024 · Synced Oct 7, 2026, 4:48 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

A Study of Continuous Oral Contraceptives and Doxycycline

NCT00480532
View directory record Official record
Conditions
Contraceptives, Oral
Interventions
Lybrel, Doxycycline, Oracea, Placebo, Doxycycline 100bid x5 days at the time of bleeding, Subantimicrobial doxycycline daily, placebo daily
Drug
Lead sponsor
Oregon Health and Science University
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
131 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2007 – 2011
U.S. locations
2
States / cities
Honolulu, Hawaii • Portland, Oregon
Source: ClinicalTrials.gov public record
Updated Oct 22, 2014 · Synced Oct 7, 2026, 4:48 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Safety and Efficacy Study of Doxycycline in Combination With Interferon-B-1a to Treat Multiple Sclerosis

NCT00246324
View directory record Official record
Conditions
Multiple Sclerosis
Interventions
Interferon beta 1a, oral doxycycline
Drug
Lead sponsor
Louisiana State University Health Sciences Center Shreveport
Other
Eligibility
18 Years to 55 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2003 – 2009
U.S. locations
1
States / cities
Shreveport, Louisiana
Source: ClinicalTrials.gov public record
Updated Nov 8, 2022 · Synced Oct 7, 2026, 4:48 AM 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 – 2028
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 May 15, 2026 · Synced Oct 7, 2026, 4:48 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 7, 2026, 4:48 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 7, 2026, 4:48 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 7, 2026, 4:48 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 7, 2026, 4:48 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

Azithromycin/Bicillin Syphilis

NCT00031499
View directory record Official record
Conditions
Syphilis
Interventions
Azithromycin, Benzathine Penicillin, Doxycycline
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 55 Years
Enrollment
593 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2000 – 2009
U.S. locations
7
States / cities
Birmingham, Alabama • Indianapolis, Indiana • New Orleans, Louisiana + 3 more
Source: ClinicalTrials.gov public record
Updated Apr 29, 2013 · Synced Oct 7, 2026, 4:48 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Oral Contraceptives and Subantimicrobial Doxycycline: Effect on Endometrial Matrix Metalloproteinases

NCT01469585
View directory record Official record
Conditions
Breakthrough Bleeding
Interventions
Doxycycline
Drug
Lead sponsor
University of Hawaii
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
20 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011 – 2012
U.S. locations
1
States / cities
Honolulu, Hawaii
Source: ClinicalTrials.gov public record
Updated Dec 17, 2020 · Synced Oct 7, 2026, 4:48 AM EDT