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Showing 1–24 of 130 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Trimethoprim/Sulfamethoxazole (TMP/SMX) Clear all
Recruiting Phase 4 Interventional

Prophylactic Oral Antibiotics on Sinonasal Outcomes Following Endoscopic Transsphenoidal Surgery for Pituitary Lesions

NCT03014687
View directory record Official record
Conditions
Antibiotics, Pituitary Adenoma
Interventions
Placebo, Oral Antibiotics cefdinir or trimethoprim/sulfamethoxazole
Drug
Lead sponsor
St. Joseph's Hospital and Medical Center, Phoenix
Other
Eligibility
18 Years to 84 Years
Enrollment
116 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2019
U.S. locations
1
States / cities
Phoenix, Arizona
Source: ClinicalTrials.gov public record
Updated Aug 14, 2018 · Synced Sep 28, 2026, 9:04 PM EDT
Completed No phase listed Observational

A Study of Fluoroquinolones Exposure and Collagen-Related Serious Adverse Events

NCT03479736
View directory record Official record
Conditions
Retinal Detachment, Achilles Tendon, Aneurysm, Dissecting
Interventions
Oral Fluoroquinolones (FQ), Other Antibiotics, Febrile Illness Not Treated with Antibiotics Will be Analyzed as an Exposure
Drug · Other
Lead sponsor
Janssen Research & Development, LLC
Industry
Eligibility
Not listed
Enrollment
117,911 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
Titusville, New Jersey
Source: ClinicalTrials.gov public record
Updated Jun 24, 2025 · Synced Sep 28, 2026, 9:04 PM EDT
Completed Phase 2Phase 3 Interventional Results available

Strategies Using Off-Patent Antibiotics for Methicillin Resistant S. Aureus "STOP MRSA"

NCT00729937
View directory record Official record
Conditions
Staphylococcal Infection
Interventions
Cephalexin, Clindamycin, Placebo, Trimethoprim-sulfamethoxazole
Drug · Other
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
13 Years and older
Enrollment
2,265 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2009 – 2013
U.S. locations
5
States / cities
Phoenix, Arizona • Sylmar, California • Baltimore, Maryland + 2 more
Source: ClinicalTrials.gov public record
Updated Feb 17, 2015 · Synced Sep 28, 2026, 9:04 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 27, 2026 · Synced Sep 28, 2026, 9:04 PM EDT
Completed Phase 1 Interventional

Effect of Fluconazole, Clarithromycin, and Rifabutin on the Pharmacokinetics of Sulfamethoxazole-Trimethoprim and Dapsone and Their Hydroxylamine Metabolites

NCT00000826
View directory record Official record
Conditions
Bacterial Infections, Mycoses, HIV Infections
Interventions
Clarithromycin, Rifabutin, Sulfamethoxazole-Trimethoprim, Dapsone, Fluconazole
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 65 Years
Enrollment
48 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Ends 1999
U.S. locations
2
States / cities
San Francisco, California • Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Oct 28, 2021 · Synced Sep 28, 2026, 9:04 PM EDT
Completed Phase 4 Interventional Accepts healthy volunteers Results available

Antibiotic Prophylaxis for Transrectal Prostate Biopsy

NCT01659866
View directory record Official record
Conditions
Infection
Interventions
Ciprofloxacin, trimethoprim-sulfamethoxazole, cefuroxime, ceftriaxone, gentamicin, amikacin, aztreonam, imipenem
Drug
Lead sponsor
Northwestern University
Other
Eligibility
30 Years to 90 Years · Male only
Enrollment
563 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2012 – 2016
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Jun 24, 2019 · Synced Sep 28, 2026, 9:04 PM EDT
Completed Phase 4 Interventional

Prophylactic Antibiotics for Urinary Tract Infections After Robot-Assisted Radical Cystectomy

NCT04502095
View directory record Official record
Conditions
Bladder Carcinoma, Refractory Bladder Carcinoma, Urinary Tract Infection
Interventions
Clindamycin, Diary, Ertapenem, Levofloxacin, Nitrofurantoin, Trimethoprim-Sulfamethoxazole
Drug · Other
Lead sponsor
Roswell Park Cancer Institute
Other
Eligibility
18 Years and older
Enrollment
89 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2025
U.S. locations
1
States / cities
Buffalo, New York
Source: ClinicalTrials.gov public record
Updated Aug 2, 2025 · Synced Sep 28, 2026, 9:04 PM EDT
Completed Phase 3 Interventional

A Study of Three Drugs Plus Zidovudine in the Prevention of Infections in HIV-Infected Patients

NCT00000991
View directory record Official record
Conditions
Pneumonia, Pneumocystis Carinii, HIV Infections
Interventions
Pentamidine isethionate, Sulfamethoxazole-Trimethoprim, Dapsone, Zidovudine
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
13 Years and older
Enrollment
600 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Ends 1994
U.S. locations
20
States / cities
Los Angeles, California • Oakland, California • San Diego, California + 15 more
Source: ClinicalTrials.gov public record
Updated Nov 3, 2021 · Synced Sep 28, 2026, 9:04 PM EDT
Completed Not applicable Interventional

Evaluation of the Interaction Between Low Dose Sulfamethoxazole-Trimethoprim and Zidovudine

NCT00000732
View directory record Official record
Conditions
HIV Infections
Interventions
Sulfamethoxazole-Trimethoprim, Zidovudine
Drug
Lead sponsor
National Institute of Allergy and Infectious Diseases (NIAID)
NIH
Eligibility
18 Years to 50 Years
Enrollment
10 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
Ends 1990
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Nov 2, 2021 · Synced Sep 28, 2026, 9:04 PM EDT
Not yet recruiting Phase 4 Interventional

Effect of S. Aureus Skin Decolonization on Disease Severity in Atopic Dermatitis Patients

NCT06397781
View directory record Official record
Conditions
Atopic Dermatitis
Interventions
Skin Cleanser Combination No.1
Drug
Lead sponsor
Boston Children's Hospital
Other
Eligibility
6 Years and older
Enrollment
100 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2031 – 2039
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Mar 9, 2026 · Synced Sep 28, 2026, 9:04 PM EDT
Completed Phase 4 Interventional Results available

Utility of Trimethoprim-sulfamethoxazole Use in Skin Abscess Management

NCT00679302
View directory record Official record
Conditions
Skin Diseases, Infectious
Interventions
Trimethoprim-sulfamethoxazole, Placebo group
Drug
Lead sponsor
St. Louis University
Other
Eligibility
3 Months to 18 Years
Enrollment
161 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2006 – 2008
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated May 3, 2018 · Synced Sep 28, 2026, 9:04 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Trial of Antibiotic Treatment for Skin Abscess in Patients at Risk for Methicillin-Resistant Staphylococcus Aureus (MRSA) Infection

NCT00829686
View directory record Official record
Conditions
Abscess
Interventions
Septra
Drug
Lead sponsor
59th Medical Wing
Federal
Eligibility
18 Years to 55 Years
Enrollment
31 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2008
U.S. locations
1
States / cities
Lackland Air Force Base, Texas
Source: ClinicalTrials.gov public record
Updated Jun 8, 2017 · Synced Sep 28, 2026, 9:04 PM EDT
Active, not recruiting Not applicable Interventional

Prophylactic Antibiotics or Placebo After Hypospadias Repair

NCT02096159
View directory record Official record
Conditions
Hypospadias
Interventions
trimethoprim-sulfamethoxazole, placebo
Drug · Other
Lead sponsor
Ann & Robert H Lurie Children's Hospital of Chicago
Other
Eligibility
Up to 5 Years · Male only
Enrollment
93 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2014 – 2025
U.S. locations
1
States / cities
Chicago, Illinois
Source: ClinicalTrials.gov public record
Updated Nov 13, 2024 · Synced Sep 28, 2026, 9:04 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers

Antibiotic Use in Distal Hypospadias Repair

NCT03275519
View directory record Official record
Conditions
Hypospadias
Interventions
Randomization to not receive prophylactic antibiotics after surgery., Randomization to receive prophylactic antibiotics after surgery
Other
Lead sponsor
Arkansas Children's Hospital Research Institute
Other
Eligibility
3 Months to 6 Years · Male only
Enrollment
48 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2015 – 2017
U.S. locations
1
States / cities
Little Rock, Arkansas
Source: ClinicalTrials.gov public record
Updated Sep 6, 2017 · Synced Sep 28, 2026, 9:04 PM EDT
Recruiting Phase 1 Interventional

A Study of the Safety and Tolerability of ASP7317 in Senior Adults Who Are Losing Their Clear, Sharp Central Vision Due to Geographic Atrophy Secondary to Dry Age-related Macular Degeneration

NCT03178149
View directory record Official record
Conditions
Age-Related Macular Degeneration
Interventions
ASP7317, tacrolimus, trimethoprim-sulfamethoxazole, Acyclovir, Nystatin
Drug
Lead sponsor
Astellas Institute for Regenerative Medicine
Industry
Eligibility
50 Years and older
Enrollment
42 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2027
U.S. locations
20
States / cities
Phoenix, Arizona • Los Angeles, California • Palo Alto, California + 16 more
Source: ClinicalTrials.gov public record
Updated Sep 2, 2026 · Synced Sep 28, 2026, 9:04 PM EDT
Completed Not applicable Interventional Accepts healthy volunteers Results available

Single Dose Monurol for Treatment of Acute Cystitis

NCT00976963
View directory record Official record
Conditions
Urinary Tract Infection
Interventions
TMP/SMX, Fosfomycin
Drug
Lead sponsor
University of Washington
Other
Eligibility
18 Years to 45 Years · Female only
Enrollment
300 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2009 – 2016
U.S. locations
1
States / cities
Seattle, Washington
Source: ClinicalTrials.gov public record
Updated Jun 4, 2023 · Synced Sep 28, 2026, 9:04 PM EDT
Recruiting Phase 4 Interventional

Prophylactic Antibiotics for Outpatient Urethral Bulking

NCT07501065
View directory record Official record
Conditions
Urinary Tract Infections, Stress Urinary Incontinence, Urinary Incontinence
Interventions
Bactrim (800/160 mg), Keflex (500 mg), Cipro (250 mg), or Macrobid (100mg)
Drug
Lead sponsor
University of Miami
Other
Eligibility
18 Years and older · Female only
Enrollment
150 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2026 – 2028
U.S. locations
2
States / cities
Miami, Florida
Source: ClinicalTrials.gov public record
Updated Aug 19, 2026 · Synced Sep 28, 2026, 9:04 PM EDT
Not listed Phase 4 Interventional

Struvite Stones Antibiotic Study

NCT02375295
View directory record Official record
Conditions
Kidney Stones
Interventions
ciprofloxacin, cotrimoxazole-trimethoprim, macrodantin
Drug
Lead sponsor
University of British Columbia
Other
Eligibility
19 Years and older
Enrollment
28 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2015 – 2023
U.S. locations
11
States / cities
Scottsdale, Arizona • San Diego, California • Baltimore, Maryland + 8 more
Source: ClinicalTrials.gov public record
Updated May 16, 2022 · Synced Sep 28, 2026, 9:04 PM EDT
Not listed Phase 2 Interventional Accepts healthy volunteers

New Mexico Honey Wound Treatment Research Study

NCT01748318
View directory record Official record
Conditions
Community-acquired Methicillin-resistant Staphylococcus Aureus Infection
Interventions
New Mexico Honey, Bactrim DS
Drug
Lead sponsor
R. Stephen Rankin, M.D.
Individual
Eligibility
16 Years to 75 Years
Enrollment
60 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2013 – 2018
U.S. locations
1
States / cities
Farmington, New Mexico
Source: ClinicalTrials.gov public record
Updated May 9, 2016 · Synced Sep 28, 2026, 9:04 PM EDT
Completed Phase 3 Interventional Results available

Randomized Intervention for Children With Vesicoureteral Reflux (RIVUR)

NCT00405704
View directory record Official record
Conditions
Vesicoureteral Reflux, Urinary Tract Infections
Interventions
Trimethoprim-Sulfamethoxazole, Placebo
Drug
Lead sponsor
National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK)
NIH
Eligibility
2 Months to 71 Months
Enrollment
607 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2007 – 2014
U.S. locations
19
States / cities
Birmingham, Alabama • Wilmington, Delaware • Washington D.C., District of Columbia + 16 more
Source: ClinicalTrials.gov public record
Updated Apr 20, 2020 · Synced Sep 28, 2026, 9:04 PM EDT
Recruiting Phase 4 Interventional

Methenamine Hippurate Following Intradetrusor OnabotulinumtoxinA Injection

NCT06953271
View directory record Official record
Conditions
Overactive Bladder (OAB), Urinary Tract Infection (Diagnosis)
Interventions
Methenamine Hippurate, Typically prescribed oral antibiotic prophylaxis
Drug
Lead sponsor
Women and Infants Hospital of Rhode Island
Other
Eligibility
18 Years and older · Female only
Enrollment
164 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2027
U.S. locations
1
States / cities
Providence, Rhode Island
Source: ClinicalTrials.gov public record
Updated Aug 18, 2026 · Synced Sep 28, 2026, 9:04 PM EDT
Completed Phase 1 Interventional Accepts healthy volunteers Results available

Sulfamethoxazole Drug Interaction Study With MMX® Mesalazine/Mesalamine

NCT01469637
View directory record Official record
Conditions
Healthy
Interventions
sulfamethoxazole + MMX placebo, Sulfamethoxazole + MMX Mesalazine/mesalamine
Drug
Lead sponsor
Shire
Industry
Eligibility
18 Years to 55 Years
Enrollment
44 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2011
U.S. locations
1
States / cities
Lenexa, Kansas
Source: ClinicalTrials.gov public record
Updated Jul 12, 2021 · Synced Sep 28, 2026, 9:04 PM EDT
Terminated Phase 1Phase 2 Interventional Results available

Treatment of Pneumocystis in COPD (the TOPIC Study)

NCT05418777
View directory record Official record
Conditions
COPD Exacerbation Acute
Interventions
Trimethoprim Sulfamethoxazole, Placebo
Drug
Lead sponsor
Corewell Health East
Other
Eligibility
40 Years to 89 Years
Enrollment
1 participant
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022
U.S. locations
1
States / cities
Royal Oak, Michigan
Source: ClinicalTrials.gov public record
Updated Nov 28, 2023 · Synced Sep 28, 2026, 9:04 PM EDT
Withdrawn Not applicable Interventional

P-Co-Li (Pulmonary Covid-19 Study)

NCT04782700
View directory record Official record
Conditions
Covid19, Lung Inflammation, Hypoxemic Respiratory Failure
Interventions
Steroid Taper (Prednisone)
Other
Lead sponsor
Northwell Health
Other
Eligibility
18 Years and older
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021
U.S. locations
1
States / cities
Manhasset, New York
Source: ClinicalTrials.gov public record
Updated Feb 15, 2022 · Synced Sep 28, 2026, 9:04 PM EDT