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Showing 25–48 of 24 matching trials from the live ClinicalTrials.gov search.
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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 30, 2026 · Synced Sep 28, 2026, 2:41 PM 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 28, 2026, 2:41 PM EDT
Recruiting Phase 2 Interventional

Daily Doxycycline for Early Syphillis

NCT06683638
View directory record Official record
Conditions
Syphilis
Interventions
Doxycycline 200mg daily for 14 days
Drug
Lead sponsor
University of Washington
Other
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2026
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jun 24, 2025 · Synced Sep 28, 2026, 2:41 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 8, 2019 · Synced Sep 28, 2026, 2:41 PM EDT
Completed Phase 4 Interventional

Use of a Novel Diet (UC DIET) for Treatment of Mild to Moderate Active Pediatric Ulcerative Colitis

NCT02345733
View directory record Official record
Conditions
Ulcerative Colitis (UC)
Interventions
Ulcerative Colitis Diet, Antibiotic cocktail
Other · Drug
Lead sponsor
Prof. Arie Levine
Government
Eligibility
8 Years to 19 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2021
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated May 31, 2022 · Synced Sep 28, 2026, 2:41 PM EDT
Terminated Phase 1 Interventional Accepts healthy volunteers

Ph1 Study of Valortim and Doxycycline in Humans

NCT00964834
View directory record Official record
Conditions
Anthrax
Interventions
Doxycycline and Valortim, Placebo Antibiotic and Valortim, Placebo Antibiotic and Placebo Valortim
Drug
Lead sponsor
PharmAthene, Inc.
Industry
Eligibility
18 Years to 65 Years
Enrollment
24 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009
U.S. locations
1
States / cities
Overland Park, Kansas
Source: ClinicalTrials.gov public record
Updated Aug 9, 2010 · Synced Sep 28, 2026, 2:41 PM EDT
Withdrawn Phase 4 Interventional

Doxycycline Outcomes in Lupus Erythematosus

NCT01014260
View directory record Official record
Conditions
Cardiovascular Disease
Interventions
Placebo, Doxycycline
Drug
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
1
States / cities
Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 29, 2012 · Synced Sep 28, 2026, 2:41 PM 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 12, 2017 · Synced Sep 28, 2026, 2:41 PM EDT
Terminated Phase 2 Interventional Results available

A Phase II Study of Doxycycline in Relapsed NHL

NCT02086591
View directory record Official record
Conditions
Adult Diffuse Large B-Cell Lymphoma, Mantle Cell Lymphoma Recurrent, Lymphoma, Follicular, Marginal Zone B-Cell Lymphoma, Malignant Lymphoma - Lymphoplasmacytic, Waldenstrom Macroglobulinemia, Small Lymphocytic Lymphoma, Chronic Lymphocytic Leukemia (CLL), T-Cell Lymphoma
Interventions
Doxycycline
Drug
Lead sponsor
University of Rochester
Other
Eligibility
18 Years and older
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2015
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Dec 21, 2016 · Synced Sep 28, 2026, 2:41 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

The Use of Oracea and Epiduo Forte in Severe Acne Patients

NCT03457636
View directory record Official record
Conditions
Acne
Interventions
Doxycycline Anhydrous 40 MG, Adapalene/Benzoyl Peroxide Gel 0.3-2.5%
Drug
Lead sponsor
Derm Research, PLLC
Other
Eligibility
12 Years and older
Enrollment
22 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2018 – 2019
U.S. locations
1
States / cities
Louisville, Kentucky
Source: ClinicalTrials.gov public record
Updated Apr 2, 2019 · Synced Sep 28, 2026, 2:41 PM 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 28, 2026 · Synced Sep 28, 2026, 2:41 PM EDT
Terminated Not applicable Interventional Results available

Evaluating the Use of ProKera Plus® in the Management of Bacterial Corneal Ulcers

NCT04850313
View directory record Official record
Conditions
Bacterial Corneal Ulcer
Interventions
ProProKera Plus®
Device
Lead sponsor
University of Arkansas
Other
Eligibility
18 Years and older
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2022
U.S. locations
1
States / cities
Little Rock, Arkansas
Source: ClinicalTrials.gov public record
Updated Jul 6, 2023 · Synced Sep 28, 2026, 2:41 PM 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 23, 2024 · Synced Sep 28, 2026, 2:41 PM EDT
Terminated Phase 4 Interventional Results available

Comparing Oral Versus Parenteral Antimicrobial Therapy

NCT05977868
View directory record Official record
Conditions
Endovascular Infection, Bone and Joint Infection, Skin and Soft Tissue Infection, Pulmonary Infection, Gastrointestinal Infection, Genitourinary Infection
Interventions
Amoxicillin, amoxicillin-clavulanate, cefadroxil, cefpodoxime, cefalexin, ciprofloxacin, delafloxacin, doxycycline, levofloxacin, linezolid, Ampicillin, ampicillin-sulbactam, cefazolin, cefepime, ceftaroline, ceftazidime, ceftazidime-avibactam, dalbavancin, daptomycin, ertapenem
Drug
Lead sponsor
West Virginia University
Other
Eligibility
18 Years and older
Enrollment
94 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2025
U.S. locations
1
States / cities
Morgantown, West Virginia
Source: ClinicalTrials.gov public record
Updated Aug 25, 2025 · Synced Sep 28, 2026, 2:41 PM EDT
Active, not recruiting Phase 4 Interventional Accepts healthy volunteers

Comparative Effectiveness Study of Spironolactone Versus Doxycycline for Acne

NCT04582383
View directory record Official record
Conditions
Acne
Interventions
Spironolactone, Doxycycline Hyclate
Drug
Lead sponsor
University of Pennsylvania
Other
Eligibility
16 Years to 40 Years · Female only
Enrollment
350 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2022 – 2027
U.S. locations
18
States / cities
Fort Smith, Arkansas • San Francisco, California • Sherman Oaks, California + 13 more
Source: ClinicalTrials.gov public record
Updated Aug 24, 2026 · Synced Sep 28, 2026, 2:41 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 23, 2005 · Synced Sep 28, 2026, 2:41 PM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

Velocity 2: An Anthrax Vaccine and Antibiotics Clinical Study

NCT04067011
View directory record Official record
Conditions
Anthrax
Interventions
Ciprofloxacin 500Mg Tablet, Doxycycline 100Mg Tablet, AV7909
Drug · Biological
Lead sponsor
Emergent BioSolutions
Industry
Eligibility
18 Years to 45 Years
Enrollment
210 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2020
U.S. locations
4
States / cities
DeLand, Florida • Kansas City, Missouri • Omaha, Nebraska + 1 more
Source: ClinicalTrials.gov public record
Updated Sep 7, 2025 · Synced Sep 28, 2026, 2:41 PM 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 28, 2026, 2:41 PM EDT
Completed Phase 2 Interventional Results available

Doxycycline to Upgrade Organ Response in Light Chain (AL) Amyloidosis Trial

NCT02207556
View directory record Official record
Conditions
Primary Systemic Amyloidosis
Interventions
Doxycycline
Drug
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
18 Years and older
Enrollment
32 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2020
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Jul 8, 2021 · Synced Sep 28, 2026, 2:41 PM 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 28, 2026, 2:41 PM EDT
Completed Phase 2 Interventional Results available

Topical NanoDox® for Atopic Dermatitis

NCT02910011
View directory record Official record
Conditions
Dermatitis, Atopic
Interventions
Nanodox 1% (doxycycline monohydrate hydrogel)
Drug
Lead sponsor
University of Florida
Other
Eligibility
18 Years to 65 Years
Enrollment
23 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
2
States / cities
Gainesville, Florida
Source: ClinicalTrials.gov public record
Updated Mar 25, 2020 · Synced Sep 28, 2026, 2:41 PM 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 28, 2026, 2:41 PM EDT
Completed Phase 2 Interventional

Study to Evaluate the Safety and Efficacy of Minocycline Ointment in Subjects With Inflamed Meibomian Gland Dysfunction

NCT03888378
View directory record Official record
Conditions
Meibomian Gland Dysfunction, MGD-Meibomian Gland Dysfunction
Interventions
0.3% Topical Minocycline Ointment, 1% Topical Minocycline Ointment, Topical Vehicle Ointment
Drug · Other
Lead sponsor
Hovione Scientia Limited
Industry
Eligibility
18 Years and older
Enrollment
270 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
20
States / cities
Azusa, California • Huntington Beach, California • Inglewood, California + 16 more
Source: ClinicalTrials.gov public record
Updated Mar 4, 2021 · Synced Sep 28, 2026, 2:41 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 18, 2017 · Synced Sep 28, 2026, 2:41 PM EDT