Potentially inappropriate anticholinergic medication use in older adults with dementia.

ABSTRACT

OBJECTIVE: To examine the prevalence and predictors of potentially inappropriate anticholinergic medication use in older adults with dementia. DESIGN: A cross-sectional study. SETTING: United States, 2009-2010. PARTICIPANTS: Medical Expenditure Panel Survey household component participants aged 65 years or older identified as having dementia and using potentially inappropriate anticholinergic medication. MAIN OUTCOME MEASURES: Prevalence and predictors of potentially inappropriate anticholinergic medication use as per the updated 2012 American Geriatrics Society Beers criteria. RESULTS: A total of 3.78 million older adult patients (95% confidence interval [CI] 3.17 million to 4.38 million) were identified as having dementia, for an overall prevalence of 4.81%. Of those patients, an estimated 1.02 million (95% CI 0.70 million to 1.30 million) were reported to use potentially inappropriate anticholinergic medications, for an overall prevalence of 26.95% (95% CI 20.10% to 33.79%). The most frequently prescribed drugs were oxybutynin, solifenacin, paroxetine, tolterodine, promethazine, and cyclobenzaprine. Multivariable logistic analysis revealed that those patients with the need characteristics of self-reported anxiety, mood disorders, and "fair/poor" general health status had increased odds of potentially inappropriate anticholinergic use, while patients with the predisposing characteristic of being aged 75-84 years had decreased odds of potentially inappropriate anticholinergic use. CONCLUSION: More than one in four older adults with dementia were found to use potentially inappropriate anticholinergics. Given the adverse cognitive effects of these medications, there is a strong need to monitor and optimize their use in older adult patients with dementia.