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Journal Article
Review
Pharmacokinetic and pharmacodynamic alterations in older people with dementia.
INTRODUCTION: The number of people with dementia internationally is increasing. Older adults with dementia are prescribed multiple medications, both to treat dementia symptoms and to manage their other medical conditions. Dementia is correlated with increasing age and frailty; this provides insight into how the efficacy and toxicity of medications may be altered in people with dementia. Areas covered: This review discusses the current evidence of the alterations in pharmacokinetics that can occur with aging, frailty and in people with dementia. The evidence is presented via the four primary pharmacokinetic processes (absorption, distribution, metabolism and elimination). Additionally, distribution into the brain, sex considerations and potential pharmacodynamic alterations in older people with dementia are discussed. Expert opinion: While the evidence is limited, people with dementia appear to be at a higher risk of toxicity of some medications due to altered pharmacokinetic processes and pharmacodynamics. There are a number of limitations to the research and there are still significant gaps in knowledge in this field. Proactive, ongoing review of the appropriateness of choice of medication, dose and whether or not a medication is required at all is necessary for achieving quality use of medications in people living with dementia.
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