Daily oral Lactobacillus to reduce overactive bladder symptoms

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

Not applicable Interventional Medical University of Vienna · NCT06546189

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

PhaseNot applicable
Study typeInterventional
Enrollment100 (estimated)
Ages18 Years and up
SexFemale
SponsorMedical University of Vienna Academic / other
Locations1 site (Vienna)
Trial IDNCT06546189 on ClinicalTrials.gov

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.

Who should consider this trial

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

Not a fit: People under 18 and those with neurogenic overactive bladder are excluded and are unlikely to benefit from this intervention.

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 performed: 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.

Eligibility criteria

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 this trial is running

Vienna

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Overactive Bladder Syndrome
Last reviewed 2026-06-15 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.