Clinical trial Recruiting at 1 site Early Phase 1 Interventional Ages 18 and up

UDCA added to standard therapy to prevent C. diff recurrence

Official title: PREVENTION OF RECURRENCE OF CLOSTRIDIOIDES DIFFICILE COLITIS WITH URSODEOXYCHOLIC ACID (UCDA) AS A SUPPLEMENT TO STANDARD THERAPY

Run by Medical College of Wisconsin · NCT06884748 · Data updated 2026-11-12

This study tests whether taking ursodeoxycholic acid alongside standard antibiotics can reduce recurrence of C. difficile colitis in adults at risk.

Quick facts

PhaseEarly Phase 1
Study typeInterventional
Ages18 Years and up
SexAll
Enrollment30 (estimated)
SponsorMedical College of Wisconsin
Academic / other
Drugs / interventionsBezlutoxumab, Bezlotoxumab
Locations1 site (Milwaukee, Wisconsin)
StatusRecruiting
StartedJune 30, 2026
Main results expectedMay 1, 2028
Study endsMay 1, 2028
Registry record updatedNovember 2, 2026
Trial IDNCT06884748 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults (18+) with C. diff toxin-positive colitis and at least one risk factor for recurrence who are starting standard antibiotic therapy.

Probably not a fit

Patients without risk factors for recurrence or those who experience adverse reactions to UDCA may not benefit.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This early-phase trial examines UDCA as a supplement to usual antibiotic treatment for C. difficile colitis. Adults with toxin-positive disease and recurrence risk factors receive standard antibiotics (vancomycin, fidaxomicin, or metronidazole) plus UDCA 500 mg three times daily for up to eight weeks. The goal is to see if UDCA lowers recurrence rates, reduces need for repeated antibiotics, and remains safe and tolerable. The study focuses on whether modifying bile acids can influence recurrence dynamics in this infection. Primary outcomes include recurrence prevention and safety signals related to UDCA co-administration.

Why it matters

Potential benefit: If successful, UDCA could reduce the chance of C. diff returning after initial treatment, potentially lowering relapse-related illness and antibiotic use.

How similar studies have gone: Other approaches to prevent C. diff recurrence have shown mixed results; this specific UDCA adjunct trial is relatively novel.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Eligible patients: C. diff. toxin +ve patients \> 18 years with one or more risk factors for recurrence \[6,7\] requiring standard treatment with Flagyl, Vancomycin or fidaxomicin.

Exclusion Criteria:

* Life expectancy \< 6 months; fulminant colitis; ileus; decompensated liver disease; pregnancy and lactating females; Inability to give informed consent.

Where it's running

  • Daniel Stein
    Milwaukee, Wisconsin, United States
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.