Most people probably know Botox for its ability to stave off wrinkles in the face, but the FDA recently approved the injectable cosmetic as a viable treatment for urinary incontinence, otherwise known as an overactive bladder, according to HealthDay.

"Clinical studies have demonstrated Botox's ability to significantly reduce the frequency of urinary incontinence," Dr. Hylton Jofee of the FDA's Center for Drug Evaluation and research said in a statement. "Today's approval provides an important additional treatment option for patients with an overactive bladder, a condition that affects an estimated 33 million men and women in the United States.

Researcher found that injecting Botox into the bladder muscles can often make the bladder itself relax. This gives the organ the ability to store more fluid, making episodes of incontinence less frequent, the news source reports.

The FDA runs rigorous testing on all drugs before giving them the green light, even if they've already been approved for other purposes. In this case, the FDA cited two clinical trials that lasted over three months. More than 1,100 people who had overactive bladders were either given Botox injections or placebos. At the conclusion of the studies, individuals who had received Botox had fewer daily urinations compared to those given the placebo.

While Botox as a treatment for urinary incontinence is relatively new, the injectable cosmetic is a tried and true method for reducing the signs of aging, which is part of what has made it so popular. According to the American Society for Aesthetic Plastic Surgery (ASAPS), Botox was at the top of the list of the most common nonsurgical procedures in 2011, with a total of 2,619,739 procedures performed.