Clinical trial Recruiting at 1 site Phase 4 Interventional Ages 20 to 90 Women only

Comparing Botox injections to combined medication for overactive bladder

Official title: Evaluation of the Efficacy and Urodynamic Outcomes Between Intradetrusor onabotulinumtoxinA Injection and Combination Pharmacotherapy in Patients With Detrusor Overactivity

Run by Mackay Memorial Hospital · NCT05968885 · Data updated 2026-11-12

This study is testing whether Botox injections or a mix of two medications can help people with overactive bladder who haven't found relief from other treatments.

Quick facts

PhasePhase 4
Study typeInterventional
Ages20 Years to 90 Years
SexWomen only
Enrollment300 (estimated)
SponsorMackay Memorial Hospital
Academic / other
Locations1 site (Taipei)
StatusRecruiting
StartedOctober 1, 2021
Main results expectedJune 30, 2026
Study endsDecember 31, 2026
Registry record updatedMay 9, 2025
Trial IDNCT05968885 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are patients with detrusor overactivity who have not found relief from monotherapy with anti-muscarinics or β3-adrenoceptor agonists.

Probably not a fit

Patients with postvoid urine retention prior to treatment may not benefit from this study.

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

What this trial studies

This study investigates the effectiveness of botulinum toxin type A bladder injections compared to a combination of Mirabegron and Solifenacin in patients with detrusor overactivity who have not responded to single-drug treatments. Participants will be divided into two groups, receiving either the Botox injection or the combined pharmacotherapy. The study will assess both subjective symptoms related to incontinence and objective measures such as urinary urgency and bladder capacity. Evaluations will be conducted using standardized questionnaires and urodynamic assessments.

Why it matters

Potential benefit: If successful, this study could provide a more effective treatment option for patients suffering from refractory overactive bladder.

How similar studies have gone: Other studies have shown promising results with botulinum toxin for overactive bladder, indicating that this approach has been tested and may be effective.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Patients with detrusor overactivity which defined as a urodynamic observation characterized by involuntary detrusor contractions during the filling phase. Those who were refractory to monotherapy with either anti-muscarinics or β3-adrenoceptor agonists were enrolled for prospective study

Exclusion Criteria:

* Postvoid urine retention before treatment

Where it's running

  • Mackay Memorial Hospital
    Taipei, Taiwan
    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.