About this trial
This randomized, double-blind, placebo-controlled trial evaluates whether oral zinc plus phytase supplementation modifies clinical response to intradetrusor botulinum toxin injection in patients with overactive bladder. Participants will receive either zinc plus phytase supplementation or matching placebo for five days prior to intradetrusor botulinum toxin injection. Participants will be followed for six months after treatment to assess need for repeat botulinum toxin injection, urinary symptoms, and patient-reported outcomes related to overactive bladder.
Eligibility criteria
Qualifiers
Non-pregnant adult female at least 21 years old, with no plans to become pregnant during the course of the trial) and if of child-bearing potential, with a negative pregnancy test, and if sexually active, must be using medically acceptable contraception.
≥ 6 urgency urinary incontinence episodes on a 3-day baseline bladder diary, with these urge incontinence episodes representing greater than 50% of the total incontinent episodes recorded.
Willing and able to complete all study related items and interviews.
Refractory urgency urinary incontinence: defined as persistent symptoms despite at least one or more conservative treatments (e.g. supervised behavioral therapy, supervised physical therapy)
Disqualifiers
Neurologic diseases such as multiple sclerosis, Parkinson Disease, CVA within 6 months prior to enrollment, myasthenia gravis, Charcot-Marie-Tooth disease, clinically significant peripheral neuropathy, and complete spinal cord injury.
Untreated urinary tract infection (UTI).
Any prior use of either study therapy for treatment of urinary urge incontinence (Botox A® or Interstim®).
PVR >150 ml on 2 occasions within 6 months prior to enrollment (If the PVR value was obtained by ultrasound and was ≥150 ml, the PVR will be confirmed by catheterization which will be the gold standard).
Trial design
Treatments tested in this trial
- Zinc Citrate Oral Capsule
- Placebo