Journal
PARKINSONISM & RELATED DISORDERS
Volume 21, Issue 5, Pages 514-520Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.parkreldis.2015.02.025
Keywords
Parkinson's disease; Overactive bladder; Urinary incontinence; Solifenacin succinate; Non-motor symptoms
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Funding
- Astellas Pharma US, Inc.
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Objective: To evaluate the efficacy of solifenacin succinate in Parkinson's disease (PD) patients suffering from overactive bladder (OAB). Background: Urinary dysfunction is a commonly encountered non-motor feature in PD that significantly impacts patient quality of life. Design/methods: This was a double-blind, randomized, placebo-controlled, 3-site study with an open label extension phase to determine the efficacy of solifenacin succinate in idiopathic PD patients with OAB. Patients were randomized to receive solifenacin succinate 5-10 mg daily or placebo for 12 weeks followed by an 8-week open label extension. The primary outcome measure was the change in the mean number of micturitions per 24 h period. Secondary outcome measures included the change in the mean number of urinary incontinence episodes and the mean number of nocturia episodes. Results: Twenty-three patients were randomized in the study. There was no significant improvement in the primary outcome measure in the double-blind phase, but there was an improvement in the number of micturitions per 24 h period in the solifenacin succinate group compared to placebo at a mean dose of 6 mg/day (p = 0.01). In the open label phase, the mean number of urinary incontinence episodes per 24 h period decreased (p = 0.03), as did the number of nocturia episodes per 24 h period (p = 0.01). Adverse events included constipation and xerostomia, which resolved after treatment was discontinued. Conclusions: In this pilot trial, solifenacin succinate treatment led to an improvement in urinary incontinence, despite persistence in other OAB symptoms. (C) 2015 Elsevier Ltd. All rights reserved.
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