Oxybutynin is an antimuscarinic drug that is used in treating OAB (Overactive Bladder). Oxybutynin is a tertiary amine that has spasmolytic, anesthetic and anticholinergic properties. It is administered whenever symptoms of urinary frequency present themselves, and these symptoms vary from urinary frequency or urinary urgency. The drug acts by reducing the bladder's activity. As a result, it helps in easing of symptoms and urine release.