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Ibezapolstat

Phase 2

Clostridium Difficile Infection | Small molecule | Infectious Disease |Acurx Pharmaceuticals, Inc.|Last Updated: Apr 7, 2026

Success Probability

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Market & Valuation

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Trial Design

RandomizedDouble-BlindACTIVE_CONTROLLED
Total Trials1
Total Enrollment53

FDA Designations

FAST_TRACKQIDP

Clinical trial landscape

Ibezapolstat · 2 trials · 2 indications

Phase 2 2
NCT07513285ACX-362E [Ibezapolstat] for Oral Treatment of Recurrent Clostridioides Difficile InfectionClostridium Difficile Infection Recurrence
NOT YET_RECRUITING20 Analytics
NCT04247542ACX-362E [Ibezapolstat] for Oral Treatment of Clostridioides Difficile InfectionClostridium Difficile Infection
COMPLETED53 Analytics
PHASE2NOT YET_RECRUITING
ACX-362E [Ibezapolstat] for Oral Treatment of Recurrent Clostridioides Difficile Infection
Clostridium Difficile Infection RecurrenceUnlock trial analytics
PHASE2COMPLETED
ACX-362E [Ibezapolstat] for Oral Treatment of Clostridioides Difficile Infection
Clostridium Difficile InfectionUnlock trial analytics

Study Endpoints

Primary Endpoints

Evaluate the rate of CDI Clinical Cure (CC)
Day 16
Evaluate the rate of Sustained Clinical Cure (SCC)
Day 42
Evaluate the rate of CDI recurrence (rCDI)
Day 70
Segment 2A: Clinical Cure (CC) of Clostridioides Difficile Infection (CDI) Per Protocol (PP)/Modified Intent-to-Treat (mITT) Population
12 days

Percentage of patients with CC at the test of cure (TOC) visit on day 12. CC was defined as survival and the resolution of diarrhea in the 24-hour period immediately before end of treatment (EOT--day 10) that was maintained for 48 hours post EOT without a requirement for additional CDI treatment. Diarrhea was defined as 3 or more unformed bowel movements (UBMs) in a 24-hour period; fewer than 3 UBMs was considered as resolution of diarrhea. A UBM was defined as a Type 5, 6, or 7 bowel movement on the Bristol Stool Chart.

Segment 2B Per Protocol (PP) Population: Clinical Cure (CC) of Clostridioides Difficile Infection (CDI)
12 days

Percentage of patients with CC at the test of cure (TOC) visit on day 12. CC was defined as survival and the resolution of diarrhea in the 24-hour period immediately before end of treatment (EOT--day 10) that was maintained for 48 hours post EOT without a requirement for additional CDI treatment. Diarrhea was defined as 3 or more unformed bowel movements (UBMs) in a 24-hour period; fewer than 3 UBMs was considered as resolution of diarrhea. A UBM was defined as a Type 5, 6, or 7 bowel movement on the Bristol Stool Chart.

Segment 2B Intent-to-Treat (ITT) Population: Clinical Cure (CC) of Clostridioides Difficile Infection (CDI)
12 days

Percentage of patients with CC at the test of cure (TOC) visit on day 12. CC was defined as survival and the resolution of diarrhea in the 24-hour period immediately before end of treatment (EOT--day 10) that was maintained for 48 hours post EOT without a requirement for additional CDI treatment. Diarrhea was defined as 3 or more unformed bowel movements (UBMs) in a 24-hour period; fewer than 3 UBMs was considered as resolution of diarrhea. A UBM was defined as a Type 5, 6, or 7 bowel movement on the Bristol Stool Chart.

Secondary Endpoints

Assess the rate of CDI recurrence (rCDI)
Day 42
Assess the effects of ibezapolstat on quantitative changes to the fecal microbiome
Day 1 to Week 24
Assess time to resolution of diarrhea during the treatment period
Day 16
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeTREATMENT

Treatment Arms

ArmTypeDescription
IbezapolstatEXPERIMENTALActive investigational antibacterial agent
VancomycinACTIVE_COMPARATORStandard of care: Vancomycin 125 mg po Q6H x 10 days

Interventions

NameTypeDescription
IbezapolstatDRUGIbezapolstat 450 mg po Q12H x14 days
VancomycinDRUGActive comparator
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Eligibility Criteria

Age Range18 Years to 90 Years
SexALL
Healthy VolunteersNo

Inclusion Criteria: * Confirmed diagnosis of CDI as defined by 1) the presence of diarrhea, defined as passage of ≥ 3 UBMs within 24 hours before study Day 1, AND 2) a stool test result positive for the presence of C. difficile free toxins * Three or more CDI episodes in the past 12 months, includi...

Countries:United States
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Recent Changes (Last 90 Days)

LOWMay 26, 2026NCT07513285primaryCompletionDate: changed
LOWMay 24, 2026NCT07513285studyFirstPostDate: changed

Frequently asked questions about Ibezapolstat

What is Ibezapolstat used for?

Ibezapolstat is an investigational small molecule being developed for the treatment of Clostridium difficile infection and the prevention of Clostridium difficile infection recurrence. It is currently in Phase 2 clinical development for both indications.

How does Ibezapolstat work?

Ibezapolstat is a small molecule that belongs to the -stat class of enzyme inhibitors. It targets a bacterial enzyme, though the specific enzyme is not disclosed in the available information. Its mechanism is being studied for treating Clostridium difficile infection.

Who is developing Ibezapolstat?

Ibezapolstat is being developed by Acurx Pharmaceuticals, Inc., a biopharmaceutical company traded on NASDAQ under the ticker symbol ACXP. The company is conducting clinical trials to evaluate the drug for Clostridium difficile infection and its recurrence.

What phase is Ibezapolstat in?

Ibezapolstat is in Phase 2 clinical development. It has received Fast Track designation and Qualified Infectious Disease Product (QIDP) designation from the FDA. The drug is investigational and has not been approved by regulatory authorities.

What clinical trials is Ibezapolstat in?

Ibezapolstat has one completed Phase 2 trial, NCT04247542, which enrolled 53 participants with Clostridium difficile infection in the United States. A second Phase 2 trial, NCT07513285, is planned for recurrent Clostridium difficile infection with an estimated enrollment of 20 participants.

Is Ibezapolstat the same as ACX-362E?

Yes, Ibezapolstat is also known as ACX-362E. Clinical trial records refer to the drug as ACX-362E [Ibezapolstat], confirming that both names refer to the same investigational compound.