Brand name: Detrol, (Spanish name, Detrusito) Generic name: Tolterodine tartrate Why is Detrol prescribed? Detrol combats symptoms of overactive bladder, including frequent urination, urgency (increased need to urinate), and urge incontinence (inability to control urination). The drug works by blocking the nerve impulses that prompt the bladder to contract. Detrol may also be used for purposes other than those listed in this medication guide. Please consult your physician before taking any medication.