Allergan receives FDA approval for Botox to treat overactive bladder

Published on January 18, 2013 at 11:22 PM · No Comments

The U.S. Food and Drug Administration today expanded the approved use of Botox (onabotulinumtoxinA) to treat adults with overactive bladder who cannot use or do not adequately respond to a class of medications known as anticholinergics.

Overactive bladder is a condition in which the bladder squeezes too often or squeezes without warning. Symptoms include leaking urine (urinary incontinence), feeling the sudden and urgent need to urinate, and frequent urination.

When Botox is injected into the bladder muscle, it causes the bladder to relax, increasing the bladder's storage capacity and reducing episodes of urinary incontinence. Injecting the bladder with Botox is performed using cystoscopy, a procedure that allows a doctor to visualize the interior of the bladder while Botox is being injected.

"Clinical studies have demonstrated Botox's ability to significantly reduce the frequency of urinary incontinence," said Hylton V. Joffe, M.D., director of the Division of Reproductive and Urologic Products in FDA's Center for Drug Evaluation and Research. "Today's approval provides an important additional treatment option for patients with overactive bladder, a condition that affects an estimated 33 million men and women in the United States."

Botox's safety and effectiveness for this new indication were established in two clinical trials of 1,105 patients with symptoms of overactive bladder. Patients were randomly assigned to receive injections of 100 units of Botox (20 injections of 5 units each) or placebo.

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