Journal Article
Research Support, Non-U.S. Gov't
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Recent developments in the management of overactive bladder: focus on the efficacy and tolerability of once daily solifenacin succinate 5 mg.

BACKGROUND: Overactive bladder (OAB) is a highly prevalent symptom complex that may be extremely distressing to the patient, and can be associated with co-morbidities and reduced quality of life (QoL). One of the major pathophysiological causes of OAB is overactivity of the detrusor muscle, mediated via muscarinic receptors in the bladder. Urgency is the defining symptom of OAB, yet a significant proportion of patients also suffer from incontinence, which is the most distressing symptom to the patient. As such, restoration of continence should be a primary treatment goal. However, effective treatments should also impact on the other key symptoms of OAB, such as micturition frequency and urgency. Non-pharmacologic interventions to treat OAB can be effective but require patients to be highly motivated. In terms of pharmacologic therapy, treatment with an antimuscarinic agent is the mainstay of current therapy. Solifenacin succinate is a once-daily oral antimuscarinic for the treatment of OAB. The recommended dose is 5mg once daily and can be increased to 10 mg once daily if 5 mg is well tolerated.

OBJECTIVES: This paper reviews clinical experience with solifenacin 5 mg in patients with OAB as this is the recommended dose according to FDA product labeling.

FINDINGS: In Phase 3 studies, based on data captured in 3-day micturition diaries, greater than half of patients who were incontinent at baseline no longer reported experiencing incontinence episodes after 12 weeks of double-blind treatment with solifenacin 5 mg. Furthermore, compared with placebo, solifenacin treatment resulted in statistically significant reductions in incontinence episodes, micturition frequency and urgency episodes, with significant increases in volume voided (based on an analysis of key symptom outcomes in two pooled Phase 3 studies presented here). The most common treatment-related adverse events were expected anticholinergic side effects (dry mouth, constipation, and blurred vision), and these were generally mild to moderate. Discontinuation rates due to adverse events in the treatment and placebo groups were comparable.

CONCLUSION: Solifenacin 5 mg was found to be efficacious and had an acceptable tolerability profile in patients with OAB in these trials and this treatment may provide QoL benefits to patients.

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