Fellowship-Trained Urogynecologist
Urogynecology & Reconstructive Pelvic Surgery
Green Bay, Wisconsin
✓ Medically reviewed March 2026
Does Botox Help Overactive Bladder?
Yes — Botox is one of the most effective treatments for OAB that hasn’t responded adequately to behavioral therapy and medications. Botulinum toxin (Botox) is injected directly into the bladder muscle, where it reduces the involuntary contractions that cause urgency, frequency, and urge incontinence. It’s FDA-approved for OAB and has been used for this purpose for over a decade.
How It Works
OnabotulinumtoxinA (Botox) temporarily blocks the nerve signals that cause the bladder muscle to contract involuntarily. By relaxing the overactive muscle, it:
- Reduces urgency episodes
- Decreases bathroom frequency
- Reduces or eliminates urge incontinence
- Increases the amount your bladder can hold comfortably
Botox is a game-changer for patients who haven’t gotten enough relief from medications. It works directly where the problem is — in the bladder muscle itself. I’ve seen patients go from 15 urgency episodes a day to 2-3.
The Procedure
The injection is performed in the office and takes about 10-15 minutes:
- The bladder is numbed with a local anesthetic instilled through a small catheter
- A cystoscope (a small camera placed into the bladder) is used to see inside the bladder
- Botox is injected into about 20 spots in the bladder wall using a tiny needle
- The cystoscope is removed and you can go home
Most women describe the discomfort as mild — less than they expected. You can resume normal activities immediately.
Results and Duration
- Onset: Most women notice improvement within 1-2 weeks
- Peak effect: Reached by 4-6 weeks
- Duration: Effects typically last 6-9 months
- Repeat treatments: When symptoms return, Botox can be re-injected
- Success rate: In the largest trial of Botox for OAB, 83% of patients achieved a greater than 50% reduction in urgency incontinence episodes at one month
Considerations
The main potential side effect is temporary difficulty emptying the bladder, which occurs in about 5-10% of patients. This typically resolves on its own as the Botox gradually wears off. Your doctor will check your bladder emptying after the procedure.
I discuss all the pros and cons before recommending Botox. For the right patient, it offers dramatic improvement with minimal disruption to daily life. The brief office procedure is well worth it for the months of relief that follow.
References
- Amundsen CL, Richter HE, Menefee SA, et al. OnabotulinumtoxinA vs sacral neuromodulation on refractory urgency urinary incontinence in women: a randomized clinical trial. JAMA. 2016;316(13):1366-1374. PMID: 27701661
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