The purpose of our study is to evaluate the efficacy and safety of different volumes of bladder-numbing medication for pain relief at the time of office bladder Botox injections. This is a randomized prospective, double-blind superiority trial comparing 200 ml 2% lidocaine versus 30 ml 2% lidocaine for office Botox injections.
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Visual Analog Scale (VAS)
Timeframe: on day of enrollment and procedure