COMPARATIVE STUDY
JOURNAL ARTICLE
MULTICENTER STUDY
RANDOMIZED CONTROLLED TRIAL

Efficacy, safety, and tolerability of extended-release once-daily tolterodine treatment for overactive bladder in older versus younger patients

Norman R Zinner, Anders Mattiasson, Stuart L Stanton
Journal of the American Geriatrics Society 2002, 50 (5): 799-807
12028164

OBJECTIVES: To evaluate the efficacy, safety, and tolerability of a new, once-daily extended-release (ER) formulation of tolterodine in treating overactive bladder in older (> or =65) and younger (<65) patients.

DESIGN: A 12-week double-blind, placebo-controlled clinical trial.

SETTING: An international study conducted at 167 medical centers.

PARTICIPANTS: One thousand fifteen patients (43.1% aged > or =65) with urge incontinence and urinary frequency.

INTERVENTION: Patients were randomized to treatment with tolterodine ER 4 mg once daily (qd) (n = 507) or placebo (n = 508) for 12 weeks.

MEASUREMENTS: Efficacy, measured with micturition charts (incontinence episodes, micturitions, volume voided per micturition) and subjective patient assessments, safety, and tolerability endpoints were evaluated, relative to placebo, according to two age cohorts: younger than 65 and 65 and older.

RESULTS: Mean age in the older and younger patient cohorts was 74 (range 65-93) and 51 (range 20-64), respectively. Compared with placebo, significant improvements in micturition chart variables with tolterodine ER showed no age-related differences. Irrespective of age, significantly more tolterodine ER recipients than placebo recipients reported an improvement in urgency symptoms. After 12 weeks of treatment with tolterodine ER, a fivefold increase in the percentage of patients able to finish tasks before voiding in response to urgency was noted in both age groups (<65: from 6.5-32.8%, > or =65: from 5.1-26.2%). Tolterodine ER recipients, irrespective of age, also had significant improvements in their bladder condition than did placebo recipients. Overall, a greater percentage of patients, irrespective of age, perceived any benefit with tolterodine ER than with placebo (P <.001). Dry mouth (of any severity) was the most common adverse event in both the tolterodine ER and placebo treatment arms, irrespective of age (<65: ER 22.7%, placebo 8.1%; > or =65: ER 24.3%, placebo 7.2%). Few patients (<2%) experienced severe dry mouth. No central nervous system, visual, cardiac (per electrocardiogram), or laboratory safety concerns were noted. Withdrawal rates due to adverse events on tolterodine ER 4 mg qd were comparable in the two age cohorts (<65: 5.5%; > or =65: 5.1%; P =.87).

CONCLUSIONS: The new, once-daily ER formulation of tolterodine is efficacious, safe, and well tolerated in the treatment of patients with symptoms of overactive bladder, irrespective of age.

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