Efficacy and Safety of Mirabegron Versus Oxybutynin After Posterior Urethral Valve Ablation

June 26, 2026 updated by: Mohamed Ahmed Hassan, South Valley University

Efficacy and Safety of Mirabegron Versus Oxybutynin After Posterior Urethral Valve Ablation: A Comparative Prospective Randomized Study

Posterior urethral valve is the main cause of bladder outlet obstruction in male infants and the most common cause of obstructive uropathy leading to chronic renal failure and end-stage renal disease in children.The incidence of posterior urethral valve is approximately 1:7,000-8,000 live births.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

Posterior urethral valve is the main cause of bladder outlet obstruction in male infants and the most common cause of obstructive uropathy leading to chronic renal failure and end-stage renal disease in children.The incidence of posterior urethral valve is approximately 1:7,000-8,000 live births.

Anatomically, it is a membrane starting at the verumontanum and attached distally in the posterior urethra in the male child, resulting in valve like obstruction to the urine outflow leading to harmful effects on the urinary bladder and the upper urinary tracts.

Initial management of children with posterior urethral valves is immediate bladder drainage followed by endoscopic posterior urethral valve ablation. However, despite the early relief of bladder outlet obstruction, remaining pathological changes in the urinary bladder can lead to significant bladder dysfunction which leads to impaired upper tract drainage; valve bladder syndrome.

Oxybutynin is primarily indicated for the treatment of overactive bladder syndrome. It is still the most widely prescribed drug for overactive bladder in the world. It has been demonstrated to be safe for administration in the paediatric neurogenic bladder population.

Mirabegron, a beta-3 adrenergic agonist has been used for the treatment of overactive bladder symptoms as an alternative to anticholinergics with minimal side effects. Few studies stated safety of mirabegron in pediatric population with overactive bladder.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
52

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Egypt
    • South Valley
      • Qina, South Valley, Egypt
        • Qina University hospital, South Valley University Hospital

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Child

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

- All children older than 3 years old who have undergone posterior urethral valve ablation

Exclusion Criteria:

  • Children younger than 3 years old.
  • Children with residual valve.
  • Children who had undergone urinary diversion (vesicostomy or ureterostomy).
  • Children with other conditions that can potentially affect upper or lower urinary tract function (spina bifida, anorectal malformation,prune belly syndrome).

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Active Comparator: Group A (Mirabegron Tablets):
About 26 children suffering from Valve Bladder Syndrome after posterior urethral valve ablation and will be maintained on Mirabegron tablets (0.5-1 mg/kg/daily) orally.
Drug: Mirabegron
To assess the efficacy and the safety of Mirabegron and Oxybutynin drugs after posterior urethral valve ablation regarding: the Effect on upper and lower urinary tract and Febrile UTI recurrence.
Other Names:
  • Oxybutynin
Active Comparator: Group B (Oxybutynin Tablets):
About 26 children suffering from Valve Bladder Syndrome after posterior urethral valve ablation and will be maintained on Oxybutynin Syrup (0.2 mg/kg 3 times per day) orally.
Drug: Mirabegron
To assess the efficacy and the safety of Mirabegron and Oxybutynin drugs after posterior urethral valve ablation regarding: the Effect on upper and lower urinary tract and Febrile UTI recurrence.
Other Names:
  • Oxybutynin

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Efficacy of Mirabegron and Oxybutynin on upper and lower urinary tract
Time Frame: 6 Months
Assessment the drugs used on the upper and lower urinary tract after posterior urethral valve ablation in children by using shape,wall, reflux and diverticuli (SWRD) score from 0 to 7 where as 0 is better improvement but 7 is worsen improvement .
6 Months
Safety of Mirabegron usage after posterior urethral valve ablation by measuring arterial blood pressure
Time Frame: 6 Months
Assessment of the safety of Mirabegron drug in children after posterior urethral valve ablation by measuring arterial blood pressure by Mercury Sphygmomanometer (mmHg )
6 Months
Safety of Mirabegron usage after posterior urethral valve ablation by measuring heart rate
Time Frame: 6 Months
Assessment of the safety of Mirabegron drug in children after posterior urethral valve ablation by measuring heart rate by pulse oximeter (beat per minute).
6 Months

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Urinary tract infection Recurrency
Time Frame: 6 Months
Assessment of Efficacy of Mirabegron and Oxybutynin on reduction of the rate of Urinary tract infection by assessment of presence of significant pyuria in urine analysis.
6 Months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
South Valley University

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Chair: Ahmad Abolyosr Mohamed, Professor, Professor of Urology, Faculty of medicine,South Valley University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
January 1, 2025

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
December 15, 2025

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
December 30, 2025

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
June 7, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
June 19, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
June 25, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
June 29, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
June 26, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
January 1, 2025

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • Mirabegron versus Oxybutynin

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

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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