5. Patients may be included if they were never exposed to anticholinergic agents specified for the treatment of OAB. Patients may also be included if they have previously been treated with FDA-approved anticholinergic agents for the treatment of OAB such as oxybutynin chloride (generic oxybutynin chloride, Ditropan XL®, Ditropan®, or OxytrolTM), tolterodine tartrate (Detrol® or Detrol LA®), or trospium chloride (Sanctura®, Sanctura XR®) and are no longer receiving such treatment for at least 14 days.