A study to evaluate the long term benefit of a Study Drug compared to placebo in patients with Overactive bladder symptoms.

Patients must be over 18 years and have symptoms of frequent urination and also frequent episodes of urgency associated with urinary incontinence. Patient will receive bladder evaluation by a board certified urologist who specializes in the area of pelvic bladder diseases. Patient will be required to maintain a diary of their bladder function during the course of the study which will run 12 weeks as well as screening time of 3-4 weeks.