 Group A subjects will be started on fesoterodine 4 mg once a day in the morning after the two-week washout period. They will have the option to escalate to 8 mg 2 tablets of 4 mg each after 4 weeks on fesoterodine. Patients will have the option to go back to one tablet i.e., 4 mg at any time in the study. At 10 weeks 2 weeks washout and 8 weeks of study tablets, subjects are assessed in the clinic Visit 1. 