Study to Evaluate the Safety and Efficacy of DR-3001 Versus Placebo in Women With Overactive Bladder

This is a multi-center, randomized, placebo-controlled study to compare two doses of DR-3001 to placebo for a 12-week treatment period. The overall duration of patient participation will be for approximately 19 weeks. Patients will be required to keep a daily diary record of study medication use and incontinence episodes