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Showing 1–13 of 13 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Tetracycline 500 Mg Clear all
Completed Phase 3 Interventional

Control of Periodontal Infections

NCT01098448
View directory record Official record
Conditions
Periodontitis
Interventions
scaling and root planing, local tetracycline, systemic metronidazole and amoxicillin, surgery, local antibiotics and systemic metronidazole and amoxicillin, local tetracycline and periodontal surgery, periodontal surgery and systemic metronidazole and amoxicillin, surgery, local tetracycline, systemic metronidazole and amoxicillin
Other · Drug
Lead sponsor
The Forsyth Institute
Other
Eligibility
20 Years and older
Enrollment
187 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
1999 – 2004
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 1, 2010 · Synced Sep 26, 2026, 5:56 PM EDT
Enrolling by invitation Phase 4 Interventional

Antibiotic Prophylaxis in High-Risk Arthroplasty Patients

NCT04297592
View directory record Official record
Conditions
Infections Joint Prosthetic, Overweight or Obesity, MSSA Colonization, MRSA, Chronic Kidney Diseases, Diabetes, Autoimmune Diseases, Inflammatory Disease, Tobacco Use
Interventions
Cephalexin, Doxycycline, Cefadroxil
Drug
Lead sponsor
Mayo Clinic
Other
Eligibility
18 Years to 99 Years
Enrollment
4,618 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2028
U.S. locations
2
States / cities
Iowa City, Iowa • Rochester, Minnesota
Source: ClinicalTrials.gov public record
Updated Jul 5, 2026 · Synced Sep 26, 2026, 5:56 PM EDT
Completed Phase 2 Interventional Results available

Effect of Three Periodontal Therapies in Current Smokers and Non-Smokers

NCT00066066
View directory record Official record
Conditions
Periodontitis, Periodontal Diseases
Interventions
Scaling and root planing, Metronidazole, Amoxicillin, Doxycycline
Procedure · Drug
Lead sponsor
The Forsyth Institute
Other
Eligibility
20 Years and older
Enrollment
146 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2003 – 2009
U.S. locations
1
States / cities
Cambridge, Massachusetts
Source: ClinicalTrials.gov public record
Updated Apr 21, 2013 · Synced Sep 26, 2026, 5:56 PM 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 26, 2026, 5:56 PM 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 26, 2026, 5:56 PM EDT
Terminated Phase 4 Interventional Results available

Indwelling Pleural Catheter With Either Doxycycline or Saline at Day 7 for Pleurodesis

NCT02623959
View directory record Official record
Conditions
Advanced Cancers, Malignant Pleural Effusions
Interventions
Questionnaires, Fentanyl Patch, Fentanyl (IV), Saline, Doxycycline, Phone Calls
Behavioral · Drug · Other
Lead sponsor
M.D. Anderson Cancer Center
Other
Eligibility
18 Years and older
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2017
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Aug 6, 2019 · Synced Sep 26, 2026, 5:56 PM 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 26, 2026, 5:56 PM 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 26, 2026, 5:56 PM EDT
Completed Phase 2 Interventional

Tetracycline Treatment Tolerability Trial

NCT05219929
View directory record Official record
Conditions
Post-Treatment Lyme Disease
Interventions
Tetracycline 500 Mg, Placebo
Drug · Other
Lead sponsor
Johns Hopkins University
Other
Eligibility
18 Years to 80 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2026
U.S. locations
1
States / cities
Lutherville, Maryland
Source: ClinicalTrials.gov public record
Updated Jun 10, 2026 · Synced Sep 26, 2026, 5:56 PM EDT
Recruiting Phase 2 Interventional Accepts healthy volunteers

Effects of Treatments on Atopic Dermatitis

NCT01631617
View directory record Official record
Conditions
Eczema, Dermatitis, Skin Diseases, Genetic, Dermatitis, Atopic, Skin Diseases
Interventions
Trimethoprim/sulfamethoxazole (TMP/SMZ), Cephalexin, Doxycycline, Sodium hypochlorite, Placebo capsules, Placebo Sodium hypochlorite
Drug · Other
Lead sponsor
National Institute of Arthritis and Musculoskeletal and Skin Diseases (NIAMS)
NIH
Eligibility
2 Years to 50 Years
Enrollment
130 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2027
U.S. locations
1
States / cities
Bethesda, Maryland
Source: ClinicalTrials.gov public record
Updated Sep 15, 2026 · Synced Sep 26, 2026, 5:56 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

A Randomized Controlled Trial of Three Antibiotic Regimens for First Trimester Abortions

NCT02756403
View directory record Official record
Conditions
First Trimester Abortion
Interventions
Azithromycin, Doxycycline, Metronidazole, Placebo
Drug
Lead sponsor
Medstar Health Research Institute
Other
Eligibility
18 Years and older · Female only
Enrollment
181 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2016 – 2017
U.S. locations
2
States / cities
Washington D.C., District of Columbia • Silver Spring, Maryland
Source: ClinicalTrials.gov public record
Updated Feb 10, 2022 · Synced Sep 26, 2026, 5:56 PM EDT
Completed Phase 4 Interventional Results available

Bone Histomorphometry in Postmenopausal Men and Women With Osteoarthritis Undergoing Total Hip Replacement

NCT02576652
View directory record Official record
Conditions
Osteoporosis
Interventions
Tetracycline, Demeclocycline, Total Hip Replacement
Other · Procedure
Lead sponsor
Amgen
Industry
Eligibility
50 Years to 100 Years
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2017
U.S. locations
2
States / cities
West Haverstraw, New York
Source: ClinicalTrials.gov public record
Updated Apr 25, 2019 · Synced Sep 26, 2026, 5:56 PM 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 26, 2026, 5:56 PM EDT