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Showing 1–24 of 39 matching trials from the live ClinicalTrials.gov search.
Local D1 index available.
Filters: Intervention: Doxycycline Tablets Clear all
Not yet recruiting Phase 1 Interventional Accepts healthy volunteers

Characterization of Doxycycline Pharmacokinetics and Adherence

NCT07755618
View directory record Official record
Conditions
Sexually Transmitted Infection
Interventions
Single-Dose PK Phase - DR Group, Single-Dose PK Phase - IR Group, Multi-Dose PK Phase - Daily Group, Multi-Dose PK Phase - Intermittent Group
Drug
Lead sponsor
HIV Prevention Trials Network
Network
Eligibility
18 Years to 65 Years
Enrollment
16 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Aug 9, 2026 · Synced Sep 5, 2026, 2:21 AM EDT
Completed Phase 4 Interventional Results available

Treatment of Acne Vulgaris With Doryx Tablets Compared to Doxycyline Hyclate

NCT00635609
View directory record Official record
Conditions
Acne Vulgaris
Interventions
Doxycycline hyclate (Doryx), Doxycycline hyclate
Drug
Lead sponsor
Warner Chilcott
Industry
Eligibility
12 Years and older
Enrollment
93 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008
U.S. locations
4
States / cities
Vista, California • Miami, Florida • Louisville, Kentucky + 1 more
Source: ClinicalTrials.gov public record
Updated Apr 19, 2012 · Synced Sep 5, 2026, 2:21 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 9, 2022 · Synced Sep 5, 2026, 2:21 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 28, 2013 · Synced Sep 5, 2026, 2:21 AM EDT
Completed Phase 3 Interventional Results available

Treatment Failure of Chlamydial Infection in Males and Females in Youth Correctional Facilities

NCT00980148
View directory record Official record
Conditions
Chlamydial Infection
Interventions
Azithromycin, Doxycycline
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
12 Years to 21 Years
Enrollment
567 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2014
U.S. locations
2
States / cities
Birmingham, Alabama • Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Aug 4, 2026 · Synced Sep 5, 2026, 2:21 AM 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 29, 2026 · Synced Sep 5, 2026, 2:21 AM EDT
Completed Phase 2 Interventional Results available

Persistent Methicillin Resistant Staphylococcus Aureus Eradication Protocol (PMEP)

NCT01594827
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
Inhaled Vancomycin, Placebo (Sterile Water), Rifampin, Trimethoprim/Sulfamethoxazole (TMP/SMX), Doxycycline, Mupirocin Intranasal Creme, 4% chlorhexidine gluconate liquid skin cleanser
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
12 Years and older
Enrollment
29 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2017
U.S. locations
2
States / cities
Baltimore, Maryland • Cleveland, Ohio
Source: ClinicalTrials.gov public record
Updated Feb 25, 2019 · Synced Sep 5, 2026, 2:21 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 14, 2018 · Synced Sep 5, 2026, 2:21 AM EDT
Active, not recruiting Phase 2 Interventional

Enhanced Dermatological Care to Reduce Rash and Paronychia in Epidermal Growth Factor Receptor (EGRF)-Mutated Non-Small Cell Lung Cancer (NSCLC) Treated First-line With Amivantamab Plus Lazertinib

NCT06120140
View directory record Official record
Conditions
Carcinoma, Non-Small-Cell Lung
Interventions
Amivantamab IV, Amivantamab SC, Lazertinib, Doxycycline, Minocycline, Clindamycin, Chlorhexidine, Noncomedogenic skin moisturizer, Ruxolitinib, Tacrolimus, Zinc gluconate, Propranolol, Timolol, Clobetasol
Drug · Other
Lead sponsor
Janssen Research & Development, LLC
Industry
Eligibility
18 Years and older
Enrollment
305 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2030
U.S. locations
28
States / cities
Chandler, Arizona • Duarte, California • Fullerton, California + 25 more
Source: ClinicalTrials.gov public record
Updated Aug 27, 2026 · Synced Sep 5, 2026, 2:21 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 24, 2021 · Synced Sep 5, 2026, 2:21 AM EDT
Recruiting Phase 4 Interventional Accepts healthy volunteers

Comparing Sarecycline and Doxycycline Effects on the Skin and Gut Bacteria in Acne.

NCT07544251
View directory record Official record
Conditions
Acne Vulgaris
Interventions
Sarecycline, Doxycycline
Drug
Lead sponsor
Integrative Skin Science and Research
Industry
Eligibility
9 Years and older
Enrollment
30 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2027
U.S. locations
1
States / cities
Sacramento, California
Source: ClinicalTrials.gov public record
Updated Apr 21, 2026 · Synced Sep 5, 2026, 2:21 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Bioequivaelnce Study of Doxycycline Monohydrate 100mg Tablets Under Fed Conditions

NCT00775918
View directory record Official record
Conditions
Healthy
Interventions
Doxycycline monohydrate 100mg tablets
Drug
Lead sponsor
Ranbaxy Laboratories Limited
Industry
Eligibility
18 Years and older
Enrollment
32 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005
U.S. locations
1
States / cities
Chapel Hill, North Carolina
Source: ClinicalTrials.gov public record
Updated Oct 19, 2008 · Synced Sep 5, 2026, 2:21 AM 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 18, 2021 · Synced Sep 5, 2026, 2:21 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 26, 2026 · Synced Sep 5, 2026, 2:21 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 21, 2014 · Synced Sep 5, 2026, 2:21 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 19, 2026 · Synced Sep 5, 2026, 2:21 AM EDT
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 17, 2021 · Synced Sep 5, 2026, 2:21 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Scheduled Prophylactic Antiemetics for Reduction of Emesis With Doxycycline (SPARED) Trial

NCT02456662
View directory record Official record
Conditions
Drug-induced Nausea and Vomiting
Interventions
Ondansetron, Placebo
Drug
Lead sponsor
University of Rochester
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
319 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2019
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Apr 15, 2020 · Synced Sep 5, 2026, 2:21 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 18, 2020 · Synced Sep 5, 2026, 2:21 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Effect of Antimalarial Drugs to Rabies Vaccine for Post-exposure Prophylaxis.

NCT02564471
View directory record Official record
Conditions
Rabies
Interventions
Chloroquine, Atovaquone and Proguanil, Doxycycline, Rabies Vaccine
Drug · Biological
Lead sponsor
State University of New York - Upstate Medical University
Other
Eligibility
18 Years to 60 Years
Enrollment
103 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2019
U.S. locations
1
States / cities
Syracuse, New York
Source: ClinicalTrials.gov public record
Updated May 12, 2021 · Synced Sep 5, 2026, 2:21 AM EDT
Completed Phase 1 Interventional Accepts healthy volunteers

Fasting Study of Doxycycline Monohydrate Tablets 100 mg and Adoxa Tablets 100 mg

NCT00649571
View directory record Official record
Conditions
Healthy
Interventions
Doxycycline Monohydrate Tablets (100 mg, Adoxa Tablets 100 mg
Drug
Lead sponsor
Mylan Pharmaceuticals Inc
Industry
Eligibility
18 Years and older
Enrollment
35 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2005
U.S. locations
1
States / cities
Morgantown, West Virginia
Source: ClinicalTrials.gov public record
Updated Apr 23, 2024 · Synced Sep 5, 2026, 2:21 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 19, 2014 · Synced Sep 5, 2026, 2:21 AM EDT
Terminated Phase 2 Interventional

Doxycycline for the Treatment of Cutaneous T-Cell Lymphoma

NCT02341209
View directory record Official record
Conditions
Cutaneous T-cell Lymphoma, Mycosis Fungoides, Sezary Syndrome
Interventions
Doxycycline monohydrate
Drug
Lead sponsor
Rochester General Hospital
Other
Eligibility
18 Years and older
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2021
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Apr 26, 2021 · Synced Sep 5, 2026, 2:21 AM 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 23, 2005 · Synced Sep 5, 2026, 2:21 AM EDT