Injection of Intra-Vesical Botulinum Toxin for Treatment of Urge Urinary Incontinence (UUI) is a medical procedure used to manage a type of incontinence where there is a strong, sudden urge to urinate, often leading to involuntary leakage of urine. This procedure involves injecting botulinum toxin (commonly known by the brand name Botox) into the bladder to help reduce the overactivity of the bladder muscles that cause these urges.