Evaluating the Effect of the Probiotic on Recurrent Urinary Tract Infection in Adult Women

A Double-blinded, Randomized, Placebo-controlled, Parallel-group Study Evaluating the Effect of the Probiotic on Recurrent Urinary Tract Infection (UTI) in Adult Women Recently Treated for UTI.

Urinary tract infections (UTIs) are the most common bacterial infections in women, with about 50% of women experiencing at least one UTI in their lifetime.

The main pharmacological treatments of cystitis usually involve the use of antibiotics, in particular quinolones (such as ciprofloxacin and levofloxacin), fosfomycin, second-generation and third-generation cephalosporins, and b-lactam antibiotics associated with b-lactamase inhibitors.

Study Overview

• Status: Completed
• Conditions: Recurrent Urinary Tract Infection in Adult Women
• Intervention / Treatment: Dietary supplement: Probiotic

Detailed Description

This is a double-blinded, randomized, placebo-controlled, parallel-group study evaluating the effect of the probiotic on recurrent urinary tract infection (UTI) in adult women recently treated for UTI.

Primary objective The primary objective is to evaluate the effect of oral supplementation with probiotic on the frequency of UTI during six months from start of intervention in adult women with recurrent UTI.

• Study Type: Interventional
• Enrollment (Actual): 140
• Phase: Not Applicable

Contacts and Locations

Study Locations

• Sweden
  • Uppsala, Sweden, 752 37
    • Clinical Trial Consultants AB

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 50 years (Adult)
• Accepts Healthy Volunteers: Yes

Description

Inclusion Criteria:

1. Willing and able to give informed consent for participation in the study.
2. Woman aged 18-50 years old at screening.
3. BMI ≥18 at screening.
4. Currently on antibiotic treatment for UTI, at the time of screening. Antibiotic treatment must stop within three days prior to first IP dose.
5. Recurrent UTI defined as at least two UTIs during the last six months or at least three UTIs during the last 12 months, according to information given by the subject.
6. Able and willing to comply with the restrictions defined for the the study period (see Section 10.6).
7. Access to Bank ID and ability to use the e-health platform (i.e. Internet access).
8. Ability to understand and comply with the requirements of the study, as judged by the Investigator.

Exclusion Criteria:

1. Postmenopausal (defined as 12 months of amenorrhoea).
2. Pregnant or breastfeeding.
3. Planning to become pregnant during the study.
4. Irregular menstruations combined with perimenopausal symptoms.
5. Known hypersensitivity or allergy to any of the components of the test product, or to the comparator (placebo).
6. Use of spermicide contraceptives including spermicidal condom within three days prior to first IP dose.
7. History of complicated cystitis, urgency incontinence, recent pyelonephritis, urological and/or gynaecologist abnormalities, immunocompromised, as judged by the Investigator.

8. Unstable bowel disorder such as diarrhoea, Crohn's disease, ulcerative colitis.

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Study Plan

How is the study designed?

Design Details

• Primary Purpose: Prevention
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Double

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Placebo Comparator: Placebo	Dietary supplement: Probiotic; Probiotic
Active Comparator: Active; L reuteri	Dietary supplement: Probiotic; Probiotic

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
To Evaluate the Effect of Oral Supplementation With Lactobacillus Reuteri on the Frequency of Confirmed UTI in Adult Women With Recurrent UTI.	Mean number (Standard Deviation) of confirmed UTIs in adult women with recurrent UTI, during six months from start of intervention, as compared to placebo.	6 months

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
To Evaluate the Effect of Oral Supplementation With Lactobacillus Reuteri on the -Frequency of Confirmed UTI -Time to First Relapse of UTI. -Relapse Rate -Assess the Tolerability	Mean number of confirmed UTIs during the three months intervention period, as compared to placebo. Mean number of confirmed UTIs during the three months follow-up period, as compared to placebo. Mean time from start of intervention to first relapse of UTI, as compared to placebo. Proportion of subjects (%) who experienced at least one confirmed UTI during three months from start of intervention, as compared to placebo. Proportion of subjects (%) who experienced at least one confirmed UTI during six months from start of intervention, as compared to placebo. Occurrence and frequency of Adverse Events (AEs).	6 month

Collaborators and Investigators

• Sponsor: BioGaia AB
• Investigators: Principal Investigator: Erik Rein-Hedin, MD, CTC Clinical Trial Consultants AB

Study record dates

Study Major Dates

• Study Start (Actual): December 13, 2017
• Primary Completion (Actual): July 12, 2019
• Study Completion (Actual): July 12, 2019

Study Registration Dates

• First Submitted: December 4, 2017
• First Submitted That Met QC Criteria: December 4, 2017
• First Posted (Actual): December 8, 2017

Study Record Updates

• Last Update Posted (Estimated): September 15, 2025
• Last Update Submitted That Met QC Criteria: August 26, 2025
• Last Verified: August 1, 2025

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Pathologic Processes; Urologic Diseases; Disease Attributes; Infections; Communicable Diseases; Recurrence; Urinary Tract Infections; Dietary Supplements; Food; Diet, Food, and Nutrition; Physiological Phenomena; Food and Beverages; Probiotics
• Other Study ID Numbers: CSUB0144

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No