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Showing 1–24 of 54 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Doxycycline 100 mg Clear all
Completed Phase 1 Interventional Accepts healthy volunteers

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

NCT00648180
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
36 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 16, 2026, 2:18 AM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Doxy-Post-exposure Prophylaxis

NCT05853120
View directory record Official record
Conditions
Sexually Transmitted Diseases
Interventions
Doxycycline
Drug
Lead sponsor
Emory University
Other
Eligibility
18 Years to 59 Years
Enrollment
45 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2024
U.S. locations
1
States / cities
Atlanta, Georgia
Source: ClinicalTrials.gov public record
Updated Sep 10, 2025 · Synced Sep 16, 2026, 2:18 AM EDT
Completed Phase 2 Interventional Results available

Safety and Effect of Doxycycline in Patients With Amyloidosis

NCT01677286
View directory record Official record
Conditions
Amyloidosis
Interventions
Doxycycline 100 mg po bid x 12 months
Drug
Lead sponsor
Boston University
Other
Eligibility
18 Years and older
Enrollment
25 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2015
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Jul 31, 2017 · Synced Sep 16, 2026, 2:18 AM EDT
Completed Phase 2 Interventional

Skin Rash Study Before Chemotherapy in Colorectal & Head and Neck Cancer Patients

NCT01874860
View directory record Official record
Conditions
Colorectal Cancer, Head and Neck Cancer
Interventions
Doxycycline, Hydrocortisone 1% cream, Sunscreen, Moisturizer, Clindamycin, Medrol-dose pack (Steroid)
Drug · Other
Lead sponsor
University of Louisville
Other
Eligibility
18 Years and older
Enrollment
24 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2018
U.S. locations
1
States / cities
Louisville, Kentucky
Source: ClinicalTrials.gov public record
Updated Nov 30, 2022 · Synced Sep 16, 2026, 2:18 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 16, 2026, 2:18 AM EDT
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 30, 2026 · Synced Sep 16, 2026, 2:18 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 16, 2026, 2:18 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 20, 2022 · Synced Sep 16, 2026, 2:18 AM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Role of Oral and Intestinal Microbiota in Rheumatoid Arthritis (RA)

NCT01198509
View directory record Official record
Conditions
Rheumatoid Arthritis, Psoriatic Arthritis, Periodontal Disease
Interventions
doxycycline, vancomycin
Drug
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 70 Years
Enrollment
178 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2010 – 2013
U.S. locations
2
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Jan 12, 2015 · Synced Sep 16, 2026, 2:18 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 25, 2021 · Synced Sep 16, 2026, 2:18 AM EDT
Completed Phase 2Phase 3 Interventional

The Fleming [FMTVDM] Directed CoVid-19 Treatment Protocol

NCT04349410
View directory record Official record
Conditions
CoVid 19 Positive
Interventions
Hydroxychloroquine, Azithromycin, Hydroxychloroquine, Doxycycline, Hydroxychloroquine, Clindamycin, Hydroxychloroquine, Clindamycin, Primaquine - low dose., Hydroxychloroquine, Clindamycin, Primaquine - high dose., Remdesivir, Tocilizumab, Methylprednisolone, Interferon-Alpha2B, Losartan, Convalescent Serum
Drug
Lead sponsor
The Camelot Foundation
Other
Eligibility
Not listed
Enrollment
1,800 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020
U.S. locations
1
States / cities
Los Angeles, California
Source: ClinicalTrials.gov public record
Updated Nov 11, 2020 · Synced Sep 16, 2026, 2:18 AM EDT
Completed Phase 1Phase 2 Interventional Results available

Doxycycline and TUDCA in Patients With Transthyretin Amyloid Cardiomyopathy

NCT01855360
View directory record Official record
Conditions
Amyloidosis; Heart (Manifestation), Senile Cardiac Amyloidosis
Interventions
Tauroursodeoxycholic Acid and Doxycycline
Drug
Lead sponsor
Brigham and Women's Hospital
Other
Eligibility
18 Years to 90 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2013 – 2015
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Dec 3, 2020 · Synced Sep 16, 2026, 2:18 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 16, 2026, 2:18 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 19, 2008 · Synced Sep 16, 2026, 2:18 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 5, 2017 · Synced Sep 16, 2026, 2:18 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 16, 2026, 2:18 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 16, 2026, 2:18 AM EDT
Completed Phase 3 Interventional Results available

Adapalene-BPO Gel Associated With Doxycycline Hyclate 100 mg in the Treatment of Severe Acne Vulgaris

NCT00688064
View directory record Official record
Conditions
Severe Acne Vulgaris
Interventions
Adapalene BPO Gel associated with Doxycyline Hyclate, Vehicle Gel associated with Doxycycline Hyclate
Drug
Lead sponsor
Galderma R&D
Industry
Eligibility
12 Years to 35 Years
Enrollment
459 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2008 – 2009
U.S. locations
28
States / cities
Oceanside, California • San Diego, California • Denver, Colorado + 25 more
Source: ClinicalTrials.gov public record
Updated Feb 17, 2021 · Synced Sep 16, 2026, 2:18 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 16, 2026, 2:18 AM EDT
Completed Not applicable Interventional

Endourology Disease Group Excellence (EDGE) Consortium: Antibiotics (Abx) for Percutaneous Nephrolithotomy (PCNL) Part 2

NCT02829060
View directory record Official record
Conditions
Nephrolithiasis, Urinary Tract Infection (UTI), Sepsis
Interventions
Nitrofurantoin 100 MG, 7d, Gentamicin, 5mg/kg, Ampicillin 2g, Nitrofurantoin 100 mg, 48 hrs, Gentamicin, 80 mg, 7d, Gentamicin, 80 mg, 48hr
Drug
Lead sponsor
University of California, San Diego
Other
Eligibility
Not listed
Enrollment
330 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2025
U.S. locations
1
States / cities
San Diego, California
Source: ClinicalTrials.gov public record
Updated Mar 5, 2025 · Synced Sep 16, 2026, 2:18 AM EDT
Completed Phase 2 Interventional Results available

Efficacy of Doxycycline on Metakaryote Cell Death in Patients With Resectable Pancreatic Cancer

NCT02775695
View directory record Official record
Conditions
Resectable Pancreatic Cancer
Interventions
Doxycycline
Drug
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
18 Years and older
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2022
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jul 2, 2023 · Synced Sep 16, 2026, 2:18 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 16, 2026, 2:18 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 16, 2026, 2:18 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 9, 2018 · Synced Sep 16, 2026, 2:18 AM EDT