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Showing 1–24 of 62 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: placebo (for azithromycin) Clear all
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 29, 2026, 5:18 PM EDT
Completed Not applicable Interventional Results available

Macrolide Azithromycin to Prevent Rapid Worsening of Symptoms Associated With Chronic Obstructive Pulmonary Disease

NCT00325897
View directory record Official record
Conditions
Pulmonary Disease, Chronic Obstructive
Interventions
Macrolide Antibiotic (Azithromycin), Placebo
Drug
Lead sponsor
University of Minnesota
Other
Eligibility
40 Years and older
Enrollment
1,142 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2010
U.S. locations
10
States / cities
Birmingham, Alabama • San Francisco, California • Torrance, California + 7 more
Source: ClinicalTrials.gov public record
Updated Nov 17, 2019 · Synced Sep 29, 2026, 5:18 PM EDT
Completed Phase 2 Interventional

The Effects of Azithromycin Ophthalmic Solution, 1% Versus Placebo in Subjects With Blepharitis During a Two-Week Treatment Period

NCT00892970
View directory record Official record
Conditions
Blepharitis
Interventions
Azithromycin ophthalmic solution, 1%, Placebo
Drug
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Eligibility
18 Years and older
Enrollment
313 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2010
U.S. locations
33
States / cities
Little Rock, Arkansas • Artesia, California • Azusa, California + 29 more
Source: ClinicalTrials.gov public record
Updated Sep 25, 2011 · Synced Sep 29, 2026, 5:18 PM EDT
Completed Phase 2 Interventional

A Study of Quintuple Therapy to Treat COVID-19 Infection

NCT04334512
View directory record Official record
Conditions
COVID-19, Corona Virus Infection, Coronavirus-19, Sars-CoV2
Interventions
Hydroxychloroquine, Azithromycin, Vitamin C, Vitamin D, Zinc
Drug · Dietary Supplement
Lead sponsor
ProgenaBiome
Other
Eligibility
18 Years and older
Enrollment
118 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2024
U.S. locations
1
States / cities
Ventura, California
Source: ClinicalTrials.gov public record
Updated Feb 28, 2024 · Synced Sep 29, 2026, 5:18 PM EDT
Terminated Not applicable Interventional

Treatment of Chronic Cryptosporidiosis in AIDS Patients

NCT00001128
View directory record Official record
Conditions
Cryptosporidiosis, HIV Infections
Interventions
Interleukin-12, Paromomycin sulfate, Azithromycin
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years and older
Enrollment
16 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Ends 2005
U.S. locations
1
States / cities
Houston, Texas
Source: ClinicalTrials.gov public record
Updated Dec 13, 2016 · Synced Sep 29, 2026, 5:18 PM EDT
Terminated Phase 2 Interventional Accepts healthy volunteers Results available

Azithromycin Treatment for the Airway Microbiome in Asthma

NCT03736629
View directory record Official record
Conditions
Asthma Chronic
Interventions
Azithromycin, Placebo
Drug
Lead sponsor
University of Chicago
Other
Eligibility
18 Years to 55 Years
Enrollment
17 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2019 – 2022
U.S. locations
2
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 22, 2023 · Synced Sep 29, 2026, 5:18 PM EDT
Suspended Phase 3 Interventional

VA Remote and Equitable Access to COVID-19 Healthcare Delivery (VA-REACH TRIAL)

NCT04363203
View directory record Official record
Conditions
SARS-CoV-2, COVID-19
Interventions
Hydroxychloroquine, Azithromycin, Placebo oral tablet
Drug
Lead sponsor
Salomeh Keyhani MD
Federal
Eligibility
216 Months and older
Enrollment
300 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2021
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Jun 21, 2020 · Synced Sep 29, 2026, 5:18 PM EDT
Completed Phase 3 Interventional Results available

OPTIMIZing Treatment for Early Pseudomonas Aeruginosa Infection in Cystic Fibrosis

NCT02054156
View directory record Official record
Conditions
Cystic Fibrosis
Interventions
azithromycin, placebo, Tobramycin solution for inhalation
Drug
Lead sponsor
Bonnie Ramsey
Other
Eligibility
6 Months to 18 Years
Enrollment
221 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2018
U.S. locations
45
States / cities
Anchorage, Alaska • Tucson, Arizona • Little Rock, Arkansas + 40 more
Source: ClinicalTrials.gov public record
Updated Sep 30, 2019 · Synced Sep 29, 2026, 5:18 PM EDT
Completed Phase 3 Interventional

Study to Evaluate ALIS (Amikacin Liposome Inhalation Suspension) in Participants With Nontuberculous Mycobacterial Lung Infection Caused by Mycobacterium Avium Complex

NCT04677569
View directory record Official record
Conditions
Mycobacterium Infections, Nontuberculous
Interventions
ALIS, Azithromycin, Ethambutol, ELC (matching placebo for ALIS)
Drug
Lead sponsor
Insmed Incorporated
Industry
Eligibility
18 Years and older
Enrollment
425 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2026
U.S. locations
90
States / cities
Birmingham, Alabama • Fresno, California • Los Angeles, California + 71 more
Source: ClinicalTrials.gov public record
Updated Feb 2, 2026 · Synced Sep 29, 2026, 5:18 PM EDT
Terminated Not applicable Interventional Results available

Placebo-Controlled Trial of Antibiotic Therapy in Adults With Suspect Lower Respiratory Tract Infection (LRTI) and a Procalcitonin Level

NCT03341273
View directory record Official record
Conditions
Lower Respiratory Tract Infection
Interventions
Azithromycin, Placebo, VIDAS B.R.A.H.M.S Procalcitonin Test (PCT)
Drug · Other · Device
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 99 Years
Enrollment
514 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2020
U.S. locations
5
States / cities
Atlanta, Georgia • Decatur, Georgia • Durham, North Carolina + 1 more
Source: ClinicalTrials.gov public record
Updated Jun 27, 2023 · Synced Sep 29, 2026, 5:18 PM EDT
Completed Phase 2 Interventional Results available

Antibiotic Treatment Trial for the PANDAS/PANS Phenotype

NCT01617083
View directory record Official record
Conditions
PANS, PANDAS, Obsessive Compulsive Disorder (OCD)
Interventions
Azithromycin, Placebo
Drug
Lead sponsor
University of South Florida
Other
Eligibility
4 Years to 14 Years
Enrollment
47 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2012 – 2014
U.S. locations
1
States / cities
St. Petersburg, Florida
Source: ClinicalTrials.gov public record
Updated Apr 9, 2018 · Synced Sep 29, 2026, 5:18 PM EDT
Terminated Phase 4 Interventional

KEYS: Study Comparing Clinical Health Outcomes of Telithromycin Versus Azithromycin in Outpatients With Community-acquired Lower Respiratory Tract Infections

NCT00132951
View directory record Official record
Conditions
Respiratory Tract Infections, Chronic Bronchitis, Pneumonia
Interventions
Telithromycin, Azithromycin
Drug
Lead sponsor
Sanofi
Industry
Eligibility
18 Years to 35 Years
Enrollment
2,051 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2004 – 2006
U.S. locations
1
States / cities
Bridgewater, New Jersey
Source: ClinicalTrials.gov public record
Updated Aug 26, 2009 · Synced Sep 29, 2026, 5:18 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers

Mortality Reduction After Oral Azithromycin: Morbidity Study

NCT02048007
View directory record Official record
Conditions
Childhood Mortality
Interventions
Azithromycin, Placebo
Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
1 Month and older
Enrollment
72,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2014 – 2020
U.S. locations
2
States / cities
San Francisco, California • Baltimore, Maryland
Source: ClinicalTrials.gov public record
Updated Mar 16, 2021 · Synced Sep 29, 2026, 5:18 PM EDT
Terminated Phase 4 Interventional

Childhood Asthma Research and Education (CARE) Network Trial - Montelukast or Azithromycin for Reduction of Inhaled Corticosteroids in Childhood Asthma (MARS)

NCT00471809
View directory record Official record
Conditions
Asthma
Interventions
Budesonide + Salmeterol + Azithromycin, Budesonide + Salmeterol + Montelukast, Budesonide + Salmeterol + Placebo
Drug
Lead sponsor
National Heart, Lung, and Blood Institute (NHLBI)
NIH
Eligibility
6 Years to 17 Years
Enrollment
210 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2007
U.S. locations
6
States / cities
Tucson, Arizona • Los Angeles, California • San Diego, California + 3 more
Source: ClinicalTrials.gov public record
Updated Jul 28, 2016 · Synced Sep 29, 2026, 5:18 PM EDT
Completed No phase listed Observational Results available

Effect of Macrolide Antibiotics on Airway Inflammation in People With Chronic Obstructive Pulmonary Disease (COPD)

NCT00549445
View directory record Official record
Conditions
Pulmonary Disease, Chronic Obstructive
Interventions
Azithromycin, Placebo
Drug
Lead sponsor
University of Alabama at Birmingham
Other
Eligibility
40 Years and older
Enrollment
53 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2012
U.S. locations
1
States / cities
Birmingham, Alabama
Source: ClinicalTrials.gov public record
Updated Sep 28, 2017 · Synced Sep 29, 2026, 5:18 PM EDT
Withdrawn Phase 3 Interventional

Azithromycin Plus Hydroxychloroquine for COVID-19 Infection

NCT05026801
View directory record Official record
Conditions
Respiratory Tract Infection Viral
Interventions
Azithromycin plus hydroxychloroquine
Drug
Lead sponsor
Iterum Therapeutics, International Limited
Industry
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
1
States / cities
Waterbury, Connecticut
Source: ClinicalTrials.gov public record
Updated Oct 27, 2021 · Synced Sep 29, 2026, 5:18 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Antibiotic Resistance and Microbiome in Children Aged 6-59 Months in Nouna, Burkina Faso

NCT03187834
View directory record Official record
Conditions
Child Development
Interventions
Azithromycin, Amoxicillin, Cotrimoxazole, Placebo
Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
6 Months to 59 Months
Enrollment
252 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Mar 1, 2023 · Synced Sep 29, 2026, 5:18 PM EDT
Completed Phase 2 Interventional

The Effects of Azithromycin Ophthalmic Solution, 1% Versus Placebo in Subjects With Blepharitis During a Four-Week Treatment Period (P08638)

NCT00894530
View directory record Official record
Conditions
Blepharitis
Interventions
Azithromycin ophthalmic solution, 1%, Placebo
Drug
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Eligibility
18 Years and older
Enrollment
314 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009
U.S. locations
26
States / cities
Scottsdale, Arizona • Fayetteville, Arkansas • Artesia, California + 21 more
Source: ClinicalTrials.gov public record
Updated Nov 20, 2013 · Synced Sep 29, 2026, 5:18 PM EDT
Not yet recruiting Phase 4 Interventional

Azithromycin for Cerclage Prophylaxis

NCT07608562
View directory record Official record
Conditions
Cervical Insufficiency
Interventions
Azithromycin Prophylaxis, Azithromycin Placebo, Cefazolin, Progesterone
Drug
Lead sponsor
Wake Forest University Health Sciences
Other
Eligibility
18 Years and older · Female only
Enrollment
80 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
2
States / cities
Oak Lawn, Illinois • Park Ridge, Illinois
Source: ClinicalTrials.gov public record
Updated Aug 26, 2026 · Synced Sep 29, 2026, 5:18 PM EDT
Withdrawn Phase 2 Interventional Accepts healthy volunteers

Study to Determine the Effect of Azasite on Corneal Surface Irregularity

NCT01797107
View directory record Official record
Conditions
Meibomian Gland Dysfunction
Interventions
Azasite
Drug
Lead sponsor
Philadelphia Eye Associates
Other
Eligibility
18 Years and older
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2014
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Sep 27, 2016 · Synced Sep 29, 2026, 5:18 PM EDT
Recruiting Phase 3 Interventional Accepts healthy volunteers

Azithromycin Prophylaxis for PRElabor CEsarean DElivery Trial

NCT06605118
View directory record Official record
Conditions
Obstetrical Complications, Labor and Delivery Complication, Cesarean Delivery
Interventions
Azithromycin Injection, Placebo, Standard of Care Preoperative antibiotics
Drug
Lead sponsor
The George Washington University Biostatistics Center
Other
Eligibility
Female only
Enrollment
8,000 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2024 – 2027
U.S. locations
14
States / cities
Birmingham, Alabama • San Francisco, California • Chicago, Illinois + 10 more
Source: ClinicalTrials.gov public record
Updated Apr 8, 2026 · Synced Sep 29, 2026, 5:18 PM EDT
Completed Not applicable Interventional

A Study to Evaluate the Effects of Azithromycin on MAC Disease Prevention in HIV-Positive Patients

NCT00000947
View directory record Official record
Conditions
Mycobacterium Avium-intracellulare Infection, HIV Infections
Interventions
Azithromycin
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
13 Years and older
Enrollment
850 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Ends 2000
U.S. locations
19
States / cities
San Francisco, California • Denver, Colorado • Washington D.C., District of Columbia + 11 more
Source: ClinicalTrials.gov public record
Updated Nov 2, 2021 · Synced Sep 29, 2026, 5:18 PM EDT
Terminated Phase 4 Interventional Results available

Azithromycin for Meibomian Gland Disease

NCT03953118
View directory record Official record
Conditions
Dry Eye, Neuropathic Eye Pain, Ocular Microbiome, Depression, Anxiety
Interventions
Azithromycin Oral Product, Placebo Oral
Drug
Lead sponsor
University of California, San Francisco
Other
Eligibility
18 Years and older
Enrollment
2 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
San Francisco, California
Source: ClinicalTrials.gov public record
Updated Aug 5, 2025 · Synced Sep 29, 2026, 5:18 PM EDT
Withdrawn Phase 1Phase 2 Interventional

Macrolide Therapy to Improve Forced Expiratory Volume in 1 Second in Adults With Sickle Cell Disease

NCT02960503
View directory record Official record
Conditions
Sickle Cell Disease
Interventions
Azithromycin, Placebo
Drug · Other
Lead sponsor
Vanderbilt University
Other
Eligibility
18 Years to 50 Years
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Nashville, Tennessee
Source: ClinicalTrials.gov public record
Updated Oct 1, 2018 · Synced Sep 29, 2026, 5:18 PM EDT