The purpose of the study is to assess the impact of treatment with tolterodine ER versus placebo on Urgency Urinary Incontinence in sexually active women with OAB symptoms.

Inclusion Criteria:

• Female outpatients 18 years or older.
• Overactive bladder symptoms (subject-reported) for greater than or equal to 3 months.
• Currently sexually active with a male partner.

Exclusion Criteria:

• Diagnosed or suspected interstitial cystitis, uninvestigated hematuria, urogenital cancer, and interstitial or external radiation to the pelvis or external genitalia or clinically significant bladder outlet obstruction.
• Symptoms of incontinence being predominately stress urinary incontinence as determined by the investigator.
• Treated with antimuscarinic/ anticholinergic medication, for any reason including OAB, within the last 3 months or are expected to start therapy during the study treatment period.
• Any drug for urgency urinary incontinence (UUI) initiated within the past 3 months prior to Visit 1, with the exception of estrogen (topical or systemic) as long as treatment is not initiated within 4 weeks prior to Visit 1 (screening)