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Showing 1–24 of 40 matching trials from the live ClinicalTrials.gov search.
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Filters: Intervention: Oral Vancomycin placebo Clear all
Terminated Phase 2 Interventional Results available

Interventional Bioremediation of Microbiota in Metabolic Syndrome

NCT02730962
View directory record Official record
Conditions
Pre-Diabetes
Interventions
Vancomycin, Placebo, Neomycin, Clindamycin, Fecal Microbiota Transplantation
Drug · Other · Procedure
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 70 Years
Enrollment
12 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Feb 21, 2023 · Synced Sep 17, 2026, 3:43 AM EDT
Completed Phase 2 Interventional Results available

The Effect of an Antibiotic on the Production of Uremic Toxins by the Gut Microbiome

NCT03452189
View directory record Official record
Conditions
End Stage Renal Disease
Interventions
Vancomycin, Placebo
Drug · Other
Lead sponsor
NYU Langone Health
Other
Eligibility
18 Years to 80 Years
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2018
U.S. locations
1
States / cities
New York, New York
Source: ClinicalTrials.gov public record
Updated Mar 25, 2021 · Synced Sep 17, 2026, 3:43 AM EDT
Completed Phase 4 Interventional Results available

TOX NEG Trial: Clostridium Difficile Diagnosis and Treatment

NCT03388268
View directory record Official record
Conditions
Clostridium Difficile Infection, Diarrhea
Interventions
Oral Vancomycin, Placebo, Toxin enzyme immunoassay, Nuceleic acid amplification test
Drug · Device
Lead sponsor
Washington University School of Medicine
Other
Eligibility
18 Years and older
Enrollment
15 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2021
U.S. locations
1
States / cities
St Louis, Missouri
Source: ClinicalTrials.gov public record
Updated Jul 25, 2021 · Synced Sep 17, 2026, 3:43 AM EDT
Completed Phase 1 Interventional

Vancomycin for the Treatment of NAAT(+)/Toxin(-) C. Difficile

NCT03827447
View directory record Official record
Conditions
Clostridium Difficile Infection
Interventions
Vancomycin Oral Capsule, Placebo Oral Capsule
Drug
Lead sponsor
Medical College of Wisconsin
Other
Eligibility
18 Years and older
Enrollment
7 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2021
U.S. locations
1
States / cities
Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated Oct 19, 2021 · Synced Sep 17, 2026, 3:43 AM EDT
Completed Phase 2 Interventional

Efficacy, Safety and Tolerability of Cadazolid in Subjects With Clostridium Difficile Associated Diarrhea (CDAD)

NCT01222702
View directory record Official record
Conditions
Clostridium Difficile Infection
Interventions
Cadazolid, Vancomycin, Placebo-matching cadazolid, Placebo-matching vancomycin
Drug
Lead sponsor
Actelion
Industry
Eligibility
18 Years and older
Enrollment
84 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2011 – 2012
U.S. locations
11
States / cities
Newark, Delaware • Jacksonville, Florida • Orlando, Florida + 8 more
Source: ClinicalTrials.gov public record
Updated Jun 13, 2017 · Synced Sep 17, 2026, 3:43 AM EDT
Completed Phase 4 Interventional Results available

Screening to Prophylax Against Clostridium Difficile Infection -

NCT02996487
View directory record Official record
Conditions
Clostridium Difficile Infection
Interventions
Vancomycin, Placebo
Drug · Other
Lead sponsor
Corewell Health East
Other
Eligibility
18 Years and older
Enrollment
1,294 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2023
U.S. locations
3
States / cities
Dearborn, Michigan • Royal Oak, Michigan • Troy, Michigan
Source: ClinicalTrials.gov public record
Updated Aug 12, 2024 · Synced Sep 17, 2026, 3:43 AM EDT
Completed Phase 2 Interventional Results available

Efficacy of Oral Vancomycin Prophylaxis for Prevention of Recurrent Clostridium Difficile Infection

NCT03462459
View directory record Official record
Conditions
Recurrent Clostridium Difficile Infection, Clostridium Difficile Infection, CDI, C.Difficile Diarrhea, C. Diff Colitis, C.Difficile Colitis
Interventions
Vancomycin, Placebo
Drug
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years and older
Enrollment
79 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2023
U.S. locations
2
States / cities
Madison, Wisconsin • Milwaukee, Wisconsin
Source: ClinicalTrials.gov public record
Updated May 24, 2025 · Synced Sep 17, 2026, 3:43 AM EDT
Terminated Phase 2 Interventional Results available

Fecal Microbiota Transplantation for C. Difficile Infection in Solid Organ Transplant Recipients

NCT03617445
View directory record Official record
Conditions
Clostridium Difficile Infection Recurrence
Interventions
FMT oral capsule, Oral Vancomycin, FMT oral placebo, Oral Vancomycin placebo
Drug
Lead sponsor
University of Wisconsin, Madison
Other
Eligibility
18 Years and older
Enrollment
3 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2022 – 2023
U.S. locations
5
States / cities
Chicago, Illinois • Indianapolis, Indiana • Rochester, Minnesota + 2 more
Source: ClinicalTrials.gov public record
Updated Jan 8, 2025 · Synced Sep 17, 2026, 3:43 AM EDT
Completed Phase 2 Interventional Results available

Study of CB-183,315 in Participants With Clostridium Difficile Infection

NCT01085591
View directory record Official record
Conditions
Clostridium Difficile Infection, Diarrhea
Interventions
CB-183,315, Placebo, Vancomycin
Drug
Lead sponsor
Cubist Pharmaceuticals LLC, a subsidiary of Merck & Co., Inc. (Rahway, New Jersey USA)
Industry
Eligibility
18 Years and older
Enrollment
210 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2010 – 2011
U.S. locations
22
States / cities
Washington D.C., District of Columbia • Saint Cloud, Florida • Decatur, Georgia + 17 more
Source: ClinicalTrials.gov public record
Updated Sep 10, 2018 · Synced Sep 17, 2026, 3:43 AM EDT
Terminated Phase 4 Interventional

Oral Vancomycin for Preventing Clostridium Difficile Recurrence

NCT03200093
View directory record Official record
Conditions
Clostridium Difficile Infection
Interventions
Oral Vancomycin, Placebo
Drug
Lead sponsor
Rochester General Hospital
Other
Eligibility
18 Years and older
Enrollment
65 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2017 – 2021
U.S. locations
1
States / cities
Rochester, New York
Source: ClinicalTrials.gov public record
Updated Apr 25, 2021 · Synced Sep 17, 2026, 3:43 AM EDT
Recruiting Phase 2 Interventional

Evaluating the Safety and Efficacy of Oral Encapsulated Microbiota Transplantation Therapy in Peanut Allergic Patients

NCT05695261
View directory record Official record
Conditions
Allergy, Peanut, Peanut Allergy, Peanut Hypersensitivity, Peanut-Induced Anaphylaxis, Food Allergy, Food Allergy Peanut
Interventions
Microbial Transplantation Therapy, Antibiotic, Placebo (in place of MTT), Placebo (in place of antibiotics), Oral Immunotherapy (OIT)
Biological · Drug · Other
Lead sponsor
Rima Rachid
Other
Eligibility
12 Years to 17 Years
Enrollment
37 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2023 – 2027
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Aug 23, 2025 · Synced Sep 17, 2026, 3:43 AM EDT
Recruiting Phase 2 Interventional

Evaluation of Microbiota Transplant Therapy in Patients With Alopecia Areata

NCT06747611
View directory record Official record
Conditions
Alopecia Areata, Alopecia Totalis, Alopecia Universalis
Interventions
Vancomycin, Neomycin and MTT capsules, Placebo capsules
Drug
Lead sponsor
University of Minnesota
Other
Eligibility
18 Years to 75 Years
Enrollment
40 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2025 – 2028
U.S. locations
1
States / cities
Minneapolis, Minnesota
Source: ClinicalTrials.gov public record
Updated Jun 25, 2026 · Synced Sep 17, 2026, 3:43 AM EDT
Recruiting Phase 1Phase 2 Interventional

VE416 for Treatment of Food Allergy

NCT03936998
View directory record Official record
Conditions
Peanut Allergy
Interventions
Vancomycin plus VE416 before PNOIT, Vancomycin plus VE416 with PNOIT, Placebo plus VE416 with PNOIT, Placebo plus placebo with PNOIT
Combination Product
Lead sponsor
Massachusetts General Hospital
Other
Eligibility
12 Years to 55 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2024
U.S. locations
1
States / cities
Boston, Massachusetts
Source: ClinicalTrials.gov public record
Updated Oct 17, 2023 · Synced Sep 17, 2026, 3:43 AM EDT
Not listed Phase 2 Interventional

Microbiota Transfer Therapy for Children and Adults With Both Pitt Hopkins Syndrome and Gastrointestinal Disorders

NCT06321796
View directory record Official record
Conditions
Pitt Hopkins Syndrome
Interventions
MTP-101P, Vancomycin, Magnesium Citrate, Antacid, Placebo MTP-101P, Placebo Vancomycin
Combination Product
Lead sponsor
Gut-Brain-Axis Therapeutics Inc.
Other
Eligibility
5 Years to 55 Years
Enrollment
20 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2025
U.S. locations
1
States / cities
Tempe, Arizona
Source: ClinicalTrials.gov public record
Updated Mar 19, 2024 · Synced Sep 17, 2026, 3:43 AM EDT
Completed Phase 3 Interventional Results available

Bezlotoxumab (MK-6072) Versus Placebo in Children With Clostridium Difficile Infection (CDI) (MK-6072-001)

NCT03182907
View directory record Official record
Conditions
Clostridium Difficile Infection
Interventions
Bezlotoxumab, Placebo, Antibacterial drug treatment (ABD)
Biological · Drug
Lead sponsor
Merck Sharp & Dohme LLC
Industry
Eligibility
1 Year to 17 Years
Enrollment
148 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2018 – 2022
U.S. locations
21
States / cities
Los Angeles, California • San Francisco, California • Aurora, Colorado + 18 more
Source: ClinicalTrials.gov public record
Updated Jul 26, 2023 · Synced Sep 17, 2026, 3:43 AM EDT
Recruiting Phase 2Phase 3 Interventional

Enteral Vancomycin as Primary Prophylaxis Against Clostridioides Difficile Infection in Critically Ill Patients

NCT07221370
View directory record Official record
Conditions
Clostridium Difficile Infection, Vancomycin Resistant Enterococci Infection
Interventions
Vancomycin 125mg, Placebo
Drug
Lead sponsor
Riverside University Health System Medical Center
Other
Eligibility
18 Years and older
Enrollment
176 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Moreno Valley, California
Source: ClinicalTrials.gov public record
Updated Nov 9, 2025 · Synced Sep 17, 2026, 3:43 AM EDT
Completed Phase 1 Interventional Results available

Melanoma Checkpoint and Gut Microbiome Alteration With Microbiome Intervention

NCT03817125
View directory record Official record
Conditions
Metastatic Melanoma
Interventions
Placebo for antibiotic, Vancomycin pretreatment, Nivolumab, Matching Placebo for SER-401, SER-401
Drug
Lead sponsor
Parker Institute for Cancer Immunotherapy
Other
Eligibility
18 Years and older
Enrollment
14 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
7
States / cities
Los Angeles, California • Boston, Massachusetts • New Brunswick, New Jersey + 3 more
Source: ClinicalTrials.gov public record
Updated Jun 5, 2024 · Synced Sep 17, 2026, 3:43 AM EDT
Completed Phase 2 Interventional Results available

VE303 for Treatment of Hepatic Encephalopathy (HE)

NCT04899115
View directory record Official record
Conditions
Cirrhosis, Hepatic Encephalopathy
Interventions
Placebo, VE303, oral vancomycin
Drug
Lead sponsor
Patricia Bloom
Other
Eligibility
18 Years to 75 Years
Enrollment
19 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2021 – 2023
U.S. locations
1
States / cities
Ann Arbor, Michigan
Source: ClinicalTrials.gov public record
Updated Feb 6, 2025 · Synced Sep 17, 2026, 3:43 AM EDT
Completed Phase 2 Interventional Results available

Fundamental Modification of the Gut Microbiota in the Treatment of Refractory Crohn's Disease

NCT02765256
View directory record Official record
Conditions
Crohn's Disease
Interventions
Fluconazole, Vancomycin, Neomycin, Ciprofloxacin, Polyethylene Glycol 3350, Promethazine, Fluconazole placebo
Drug
Lead sponsor
University of Pennsylvania
Other
Eligibility
18 Years to 75 Years
Enrollment
8 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2016 – 2018
U.S. locations
1
States / cities
Philadelphia, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Feb 5, 2024 · Synced Sep 17, 2026, 3:43 AM EDT
Completed Phase 2 Interventional Results available

MTT for Children With Both Pitt Hopkins Syndrome and Gastrointestinal Disorders

NCT04132427
View directory record Official record
Conditions
Pitt Hopkins Syndrome
Interventions
vancomycin, magnesium citrate, microbiota, placebo vancomycin, real magnesium citrate, placebo microbiota
Combination Product
Lead sponsor
Arizona State University
Other
Eligibility
7 Years to 17 Years
Enrollment
6 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2019 – 2022
U.S. locations
1
States / cities
Tempe, Arizona
Source: ClinicalTrials.gov public record
Updated Aug 25, 2024 · Synced Sep 17, 2026, 3:43 AM EDT
Completed Phase 2 Interventional Accepts healthy volunteers Results available

A Trial of Encapsulated Fecal Microbiota for Vancomycin Resistant Enterococcus Decolonization

NCT03063437
View directory record Official record
Conditions
Antibiotic Resistant Strain
Interventions
Encapsulated fecal microbiota preparation, Encapsulated placebo
Biological
Lead sponsor
Microbiome Health Research Institute
Other
Eligibility
18 Years and older
Enrollment
9 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2017 – 2019
U.S. locations
2
States / cities
Indianapolis, Indiana • Madison, Wisconsin
Source: ClinicalTrials.gov public record
Updated Apr 12, 2020 · Synced Sep 17, 2026, 3:43 AM EDT
Terminated Phase 2Phase 3 Interventional Results available

Vancomycin for Primary Sclerosing Cholangitis

NCT03710122
View directory record Official record
Conditions
Primary Sclerosing Cholangitis
Interventions
Vancomycin, Placebo
Drug · Other
Lead sponsor
Elizabeth Carey
Other
Eligibility
18 Years to 76 Years
Enrollment
102 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2020 – 2025
U.S. locations
4
States / cities
Phoenix, Arizona • Tempe, Arizona • Jacksonville, Florida + 1 more
Source: ClinicalTrials.gov public record
Updated Apr 21, 2026 · Synced Sep 17, 2026, 3:43 AM EDT
Suspended Phase 1Phase 2 Interventional Accepts healthy volunteers

Safety and Efficacy of Oral Administration of the Phage Cocktail, VRELysin™, In Healthy and VRE-Colonized Subjects

NCT05715619
View directory record Official record
Conditions
Vancomycin-Resistant Enterococcal Colonization
Interventions
VRELysin™, Placebo
Biological · Other
Lead sponsor
Intralytix, Inc.
Industry
Eligibility
18 Years to 50 Years
Enrollment
80 participants
Healthy volunteers
Accepts healthy volunteers
Timeline
2023 – 2026
U.S. locations
1
States / cities
Pittsburgh, Pennsylvania
Source: ClinicalTrials.gov public record
Updated Apr 13, 2026 · Synced Sep 17, 2026, 3:43 AM EDT
Active, not recruiting Phase 2 Interventional

Microbiota Transplant Therapy for Children With Both Autism Spectrum Disorder and Gastrointestinal Disorders

NCT06503978
View directory record Official record
Conditions
Autism Spectrum Disorder, Gastro-Intestinal Disorder, Constipation, Diarrhea
Interventions
MTP-101P, Vancomycin, Miralax, Antacid, Placebo MTP-101P, Placebo Vancomycin
Combination Product
Lead sponsor
Gut-Brain-Axis Therapeutics Inc.
Other
Eligibility
4 Years to 18 Years
Enrollment
60 participants
Healthy volunteers
Healthy volunteers not accepted
Timeline
2024 – 2026
U.S. locations
1
States / cities
Tempe, Arizona
Source: ClinicalTrials.gov public record
Updated Sep 24, 2024 · Synced Sep 17, 2026, 3:43 AM EDT