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ClinicalTrials.gov public records Last synced Oct 6, 2026, 2:42 AM EDT

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Showing 145–168 of 178 matching trials from the live ClinicalTrials.gov search.
Filters: Intervention: Doxycycline (Oracea) Clear all
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 6, 2026, 2:42 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 6, 2026, 2:42 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Bioequivalence Study of Doxycycline Monohydrate 100mg Tablets Under Fasting Conditions

NCT00775177
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 20, 2008 · Synced Oct 6, 2026, 2:42 AM EDT
Not yet recruiting Phase 2 Interventional Accepts healthy volunteers

Combatting HIV Or Other STIs Early (CHOOSE)

NCT07510048
View directory record Official record
Conditions
HIV, STIs, STIs Prevention, HIV Prevention
Interventions
Standard of care and PrEP Choice at Enrollment, Standard of care followed by PrEP Choice at Month 9
Other
Lead sponsor
Westat
Other
Eligibility
13 Years to 24 Years · Male only
Enrollment
200 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2026 – 2029
U.S. locations
6
States / cities
San Francisco, California • Washington D.C., District of Columbia • Tampa, Florida + 3 more
Source: ClinicalTrials.gov public record
Updated Jul 13, 2026 · Synced Oct 6, 2026, 2:42 AM EDT
Recruiting No phase listed Observational

Pharmacokinetics and Safety of Commonly Used Drugs in Lactating Women and Breastfed Infants

NCT03511118
View directory record Official record
Conditions
Lactating Women on Select DOI, Breastfed Infants of Mothers on Select DOI
Interventions
Tranexamic acid (TXA), labetalol, metformin, nifedipine, clindamycin, oxycodone, azithromycin, escitalopram, sertraline, ondansetron, Ciprofloxacin, Doxycycline, Levofloxacin, Methylphenidate, Sumatriptan, Citalopram, Cyclobenzaprine, Furosemide, Gabapentin, Hydrochlorothiazide, Hydroxyurea, Rosuvastatin, Topiramate, Trazodone, Valganciclovir, Venlafaxine, Verapamil, Remdesivir, Anakinra, Tocilizumab, Fluvoxamine, Amoxicillin, Bupropion, Duloxetine, Hydrocodone, Levetiracetam, Paroxetine, Buprenorphine
Drug
Lead sponsor
Duke University
Other
Eligibility
Not listed
Enrollment
1,600 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2028
U.S. locations
20
States / cities
La Jolla, California • Loma Linda, California • Chicago, Illinois + 15 more
Source: ClinicalTrials.gov public record
Updated Jul 29, 2026 · Synced Oct 6, 2026, 2:42 AM EDT
Completed Phase 3 Interventional Accepts healthy volunteers

Antibiotic Treatment of Gulf War Veterans' Illnesses

NCT00007735
View directory record Official record
Conditions
Persian Gulf Syndrome, Mycoplasma Infections
Interventions
Doxycycline (200mg/day) or Placebo
Drug
Lead sponsor
US Department of Veterans Affairs
Federal
Eligibility
18 Years and older
Enrollment
450 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
1999 – 2001
U.S. locations
26
States / cities
Birmingham, Alabama • San Diego, California • Washington D.C., District of Columbia + 23 more
Source: ClinicalTrials.gov public record
Updated Oct 30, 2023 · Synced Oct 6, 2026, 2:42 AM EDT
Completed Phase 4 Interventional Results available

Comparative Efficacy and Safety of Benzoyl Peroxide Used in Combination With Clindamycin vs. Benzoyl Peroxide Used in Combination With Clindamycin and Doxycycline in the Treatment of Moderate Acne

NCT00837213
View directory record Official record
Conditions
Acne
Interventions
Benzoyl peroxide with clindamycin, Benzoyl peroxide with clindamycin and doxycycline
Drug
Lead sponsor
Stiefel, a GSK Company
Industry
Eligibility
16 Years and older
Enrollment
33 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2008
U.S. locations
2
States / cities
Fremont, California • Las Vegas, Nevada
Source: ClinicalTrials.gov public record
Updated May 25, 2017 · Synced Oct 6, 2026, 2:42 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 6, 2026, 2:42 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 6, 2026, 2:42 AM 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 6, 2026, 2:42 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 6, 2026, 2:42 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 6, 2026, 2:42 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 6, 2026, 2:42 AM EDT
Completed Phase 3 Interventional

Precision Medicine Approach for Early Dementia & Mild Cognitive Impairment

NCT05894954
View directory record Official record
Conditions
Mild Cognitive Impairment, Dementia, Mild
Interventions
Precision Medicine Approach, Hormones and Medications tailored to lab tests, combined with devices that support stress management and brain exercises, Standard-of-Care, Lifestyle including diet, exercise, stress management
Dietary Supplement · Combination Product · Behavioral
Lead sponsor
Alzheimer's Prevention and Reversal Project, Inc.
Other
Eligibility
45 Years to 76 Years
Enrollment
73 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2026
U.S. locations
6
States / cities
Folsom, California • San Rafael, California • Walnut Creek, California + 3 more
Source: ClinicalTrials.gov public record
Updated Feb 18, 2026 · Synced Oct 6, 2026, 2:42 AM EDT
Withdrawn Not applicable Interventional Accepts healthy volunteers

A Prospective Clinical Study Assessing the Effects of Tetracycline Antibiotic on Tear Film and Tear Lipid Composition Within a Population of Patients Diagnosed With Blepharitis and Dry Eye Disease

NCT00355459
View directory record Official record
Conditions
Dry Eye Syndrome
Interventions
Tetracycline: Doxycycline analog
Drug
Lead sponsor
University of Texas Southwestern Medical Center
Other
Eligibility
18 Years to 88 Years
Healthy volunteers
Accepts healthy volunteers
Timeline
2005 – 2007
U.S. locations
1
States / cities
Dallas, Texas
Source: ClinicalTrials.gov public record
Updated Dec 13, 2018 · Synced Oct 6, 2026, 2:42 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 6, 2026, 2:42 AM EDT
Completed Phase 4 Interventional

Hydroxychloroquine and Zinc With Either Azithromycin or Doxycycline for Treatment of COVID-19 in Outpatient Setting

NCT04370782
View directory record Official record
Conditions
COVID-19
Interventions
Hydroxychloroquine, Azithromycin, Zinc Sulfate, Doxycycline
Drug
Lead sponsor
St. Francis Hospital, New York
Other
Eligibility
30 Years and older
Enrollment
18 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020
U.S. locations
1
States / cities
Roslyn, New York
Source: ClinicalTrials.gov public record
Updated Dec 9, 2020 · Synced Oct 6, 2026, 2:42 AM EDT
Completed Phase 1 Interventional

Trial of Combination Therapy to Treat COVID-19 Infection

NCT04482686
View directory record Official record
Conditions
COVID, Covid-19, Corona Virus Infection, Coronavirus Infection, Coronavirus-19, SARS-CoV2, SARS-CoV Infection
Interventions
Ivermectin, Doxycycline Hcl, Zinc, Vitamin D3, Vitamin C
Drug · Dietary Supplement
Lead sponsor
ProgenaBiome
Other
Eligibility
18 Years and older
Enrollment
31 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2022
U.S. locations
1
States / cities
Ventura, California
Source: ClinicalTrials.gov public record
Updated Sep 24, 2024 · Synced Oct 6, 2026, 2:42 AM 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 6, 2026, 2:42 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 30, 2026 · Synced Oct 6, 2026, 2:42 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 5, 2026 · Synced Oct 6, 2026, 2:42 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 16, 2020 · Synced Oct 6, 2026, 2:42 AM EDT
Completed Phase 4 Interventional Results available

Parrying the Pitfalls of PrEP: Project PEACH

NCT05072093
View directory record Official record
Conditions
HIV, STI
Interventions
PrEP discontinuation intervention, Offering of on-demand oral PrEP, Offering of STI PEP, Injectable PrEP
Behavioral · Drug
Lead sponsor
Emory University
Other
Eligibility
18 Years to 45 Years · Male only
Enrollment
240 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2025
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Apr 1, 2026 · Synced Oct 6, 2026, 2:42 AM EDT
Active, not recruiting Phase 2 Interventional Results available

Doxycycline Treatment to Prevent Progressive Coronary Artery Dilation in Children With Kawasaki Disease

NCT01917721
View directory record Official record
Conditions
Kawasaki Disease, Coronary Aneurysm
Interventions
Doxycycline, Placebo
Drug
Lead sponsor
Hawaii Pacific Health
Other
Eligibility
1 Month to 21 Years
Enrollment
26 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2026
U.S. locations
1
States / cities
Honolulu, Hawaii
Source: ClinicalTrials.gov public record
Updated Jun 3, 2026 · Synced Oct 6, 2026, 2:42 AM EDT