NEW YORK--(BUSINESS WIRE)--Pfizer Inc. (NYSE: PFE) announced today that a Phase 4 study assessing the efficacy and safety of Toviaz® (fesoterodine fumarate) in patients with overactive bladder (OAB) met its primary endpoint. Toviaz reduced urge urinary incontinence (UUI) in patients with OAB who had a suboptimal response (less than 50 percent reduction in UUI) to Detrol LA (tolterodine tartrate extended release), a commonly-prescribed treatment for the condition. UUI is the involuntary leakage of any amount of urine, associated with or immediately preceded by a sense of urgency.