Clinical trial Recruiting at 1 site Interventional Ages 18 and up Women only

Daily oral Lactobacillus to reduce overactive bladder symptoms

Official title: Oral Lactobacillus Supplementation as Treatment for Overactive Bladder Syndrome: A Randomised Controlled Trial

Run by Medical University of Vienna · NCT06546189 · Data updated 2026-11-12

This trial will see if taking an oral Lactobacillus supplement twice daily for six months reduces urgency, frequency, or leakage in adult women with overactive bladder.

Quick facts

Study typeInterventional
Ages18 Years and up
SexWomen only
Enrollment100 (estimated)
SponsorMedical University of Vienna
Academic / other
Locations1 site (Vienna)
StatusRecruiting
StartedApril 1, 2025
Main results expectedMarch 31, 2027
Study endsOctober 1, 2027
Registry record updatedSeptember 29, 2025
Trial IDNCT06546189 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adult women diagnosed with overactive bladder syndrome or mixed urinary incontinence dominated by overactive bladder symptoms are the intended participants.

Probably not a fit

People under 18 and those with neurogenic overactive bladder are excluded and are unlikely to benefit from this intervention.

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

What this trial studies

This is a randomized, placebo-controlled study randomizing participants to receive OMNi BiOTiC® 41167 or matched placebo twice daily for six months. Investigators will collect vaginal and urethral swabs and urine via a single-use catheter at baseline and follow-up visits to monitor changes in the urogenital microbiome. Symptom changes will be tracked with validated overactive bladder questionnaires and voiding diaries. The protocol seeks to link any symptom improvement to shifts in microbial communities associated with Lactobacillus supplementation.

Why it matters

Potential benefit: If successful, this could provide a low-risk, non-antibiotic option to reduce urgency, frequency, and incontinence for women with overactive bladder.

How similar studies have gone: Previous small studies of vaginal or oral Lactobacillus for urinary or urogenital symptoms have shown mixed but sometimes promising results, so this approach is not entirely untested.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* diagnosis of overactive bladder syndrome or mixed urinary incontinence with predominance of overactive bladder symptoms

Exclusion Criteria:

* under age 18
* neurogenic overactive bladder

Where it's running

  • Medical University of Vienna
    Vienna, Austria
    Recruiting

Study contacts

Similar studies

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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.