[6][7] Common side effects include headache, dry mouth, constipation, and dizziness.

[9][10] Detrusor overactivity (DO, contraction of the muscular bladder wall) is the most common form of urinary incontinence (UI) in older adults.

[medical citation needed] It is characterized by uninhibited bladder contractions causing an uncontrollable urge to void.

[medical citation needed] Abnormal bladder contractions that coincide with the urge to void can be measured by urodynamic studies.

[medical citation needed] It is marketed by Pfizer in Canada and the United States under the brand name Detrol.