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Ibezapolstat

Phase 2

Clostridium Difficile Infection | Small molecule | Infectious Disease |Acurx Pharmaceuticals, Inc.|Last Updated: Aug 12, 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_TRACKQIDPRMATORPHAN_DRUG

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
RECRUITING20 Analytics
NCT04247542ACX-362E [Ibezapolstat] for Oral Treatment of Clostridioides Difficile InfectionClostridium Difficile Infection
COMPLETED53 Analytics
PHASE2RECRUITING
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
Study Sites15

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)

LOWAug 12, 2026NCT07513285Status: NOT_YET_RECRUITING → RECRUITING
LOWAug 12, 2026NCT07513285Status: NOT_YET_RECRUITING → RECRUITING

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 Clostridium Difficile Infection Recurrence. It is currently in Phase 2 clinical development and has not been approved by the FDA.

What does Ibezapolstat target?

Ibezapolstat targets a class of enzymes known as '-stat' enzymes. This mechanism is being studied for its potential to treat Clostridium Difficile Infection and its recurrence.

Who makes Ibezapolstat?

Ibezapolstat is being developed by Acurx Pharmaceuticals, Inc., a biopharmaceutical company traded on the NASDAQ under the ticker symbol ACXP.

What phase is Ibezapolstat in?

Ibezapolstat is in Phase 2 clinical development. It is an investigational drug and has not been approved by the FDA. It has received Fast Track, QIDP, RMAT, and Orphan Drug designations.

What clinical trials is Ibezapolstat in?

Ibezapolstat is being studied in two Phase 2 trials. NCT04247542, a completed trial with 53 participants, evaluated oral treatment for Clostridium Difficile Infection. NCT07513285, currently recruiting with a target enrollment of 20, is studying oral treatment for recurrent Clostridium Difficile Infection.

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]' in studies for both initial and recurrent Clostridium Difficile Infection.