Differential Prescribing of Antimuscarinic Agents in Older Adults with Cognitive Impairment

Drugs & Aging
Scott Martin VouriMargaret A Olsen

Abstract

Oral oxybutynin has been associated with the development of cognitive impairment. The objective of this study was to describe the use of oral oxybutynin versus other antimuscarinics (e.g., tolterodine, darifenacin, solifenacin, trospium, fesoterodine, transdermal oxybutynin) in older adults with documented cognitive impairment. This is a population-based retrospective analysis of antimuscarinic new users aged ≥ 66 years from January 2008 to December 2011 (n = 42,886) using a 5% random sample of Medicare claims linked with Part D data. Cognitive impairment was defined as a diagnosis of mild cognitive impairment, dementia, use of antidementia medication, and memory loss/drug-induced cognitive conditions in the year prior to the initial antimuscarinic claim. We used multivariable generalized linear models to assess indicators of cognitive impairment associated with initiation of oral oxybutynin versus other antimuscarinics after adjusting for comorbid conditions. In total, 33% received oral oxybutynin as initial therapy. Cognitive impairment was documented in 10,259 (23.9%) patients prior to antimuscarinic therapy. Patients with cognitive impairment were 5% more likely to initiate another antimuscarinic versus oral oxybutynin (rel...Continue Reading

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Citations

Aug 28, 2020·Pharmacoepidemiology and Drug Safety·Douglas BartholdJulie Zissimopoulos
Apr 24, 2021·Current Medical Research and Opinion·Nandita KachruRajender R Aparasu

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