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Drug Dosing: Geriatric Patients

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Elderly individuals encompass a diverse population with varying degrees of age-related physiological changes. Defining the elderly presents challenges, as the geriatric population is often arbitrarily categorized as individuals older than 65. However, many individuals in this group lead active and healthy lives, with an increasing number surpassing 85 years and falling into the older elderly category. Physiological changes associated with aging impact performance capacity and homeostatic...

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Age-related pharmacokinetic changes are extensively documented, but understanding age-related pharmacodynamic alterations is relatively limited. This knowledge gap can be partly attributed to the complexity of developing appropriate measures of drug responses compared to bioanalytical methods for determining drug concentrations.Most information regarding age-related differences in human pharmacodynamics originates from cross-sectional studies. However, these studies assume that observed mean...

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In geriatric patients, renal physiology undergoes significant changes, including diminished renal blood flow and a lower glomerular filtration rate (GFR), leading to alterations in medication clearance. Drugs such as aminoglycoside antibiotics, lithium, and digoxin, which rely on glomerular filtration for removal from the body, particularly impact pharmacokinetics. These drugs tend to have slower clearance rates in older adults, necessitating careful dosage considerations.Evaluation of renal...

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Distribution

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Drug distribution in the human body is influenced by several factors, including plasma protein concentration, body composition, blood flow, tissue-protein concentration, and tissue fluid pH. Among these, changes in plasma protein concentration and body composition due to aging significantly affect how drugs are distributed within the body. Specifically, aging is associated with a decrease in albumin levels by about 10% and an increase in α1-acid glycoprotein levels. These alterations are not...

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Absorption

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As individuals age, their body's physiology evolves, affecting drug pharmacokinetics. The most apparent changes occur in the gastrointestinal tract, where an increase in gastric pH, a delay in gastric emptying, and a reduction in gastrointestinal motility are observed. Remarkably, these changes do not substantially modify the absorption of orally administered drugs, particularly those absorbed via passive diffusion.Transdermal drug delivery emerges as a highly viable method for older adults due...

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Metabolism

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Geriatric patients show significant variation in how their bodies process medications, which can change how effective and safe treatments are. The liver is the primary organ where drug metabolism occurs, involving two main types of chemical reactions: phase I and II. Phase I metabolism is driven by the cytochrome P450 enzyme system, which includes key types such as CYP3A, CYP2D6, and CYP2C9. Research indicates that while aging doesn't notably alter the levels or activity of these enzymes, it...

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Related Experiment Video

Updated: Jun 28, 2026

Highlighting and Reducing the Impact of Negative Aging Stereotypes During Older Adults' Cognitive Testing

Highlighting and Reducing the Impact of Negative Aging Stereotypes During Older Adults' Cognitive Testing

Published on: January 24, 2020

Test accommodations for the geriatric patient.

Bruce Caplan¹, Judith Shechter

¹Independent Practice, Wynnewood, PA, USA. brcaplan@aol.com

Neurorehabilitation

|October 30, 2008

Summary

This summary is machine-generated.

Nonstandard testing strategies can improve neuropsychological assessments for older adults with physical or sensorimotor limitations. Flexible approaches help measure cognitive skills often missed in standard evaluations.

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Area of Science:

Neuropsychology
Gerontology
Clinical Assessment

Background:

Assessing elderly individuals with physical or sensorimotor limitations presents unique challenges.
Standard neuropsychological tests may not accurately reflect cognitive abilities in this population.
Accurate assessment is crucial for understanding functional capacity in aging.

Purpose of the Study:

To explore the utility of nonstandard testing strategies for neuropsychological evaluation in older adults.
To review professional literature supporting flexible assessment approaches.
To highlight techniques for measuring cognitive skills in individuals with sensory or motor impairments.

Main Methods:

Review of professional documents and literature on neuropsychological testing.
Discussion of selected "flexible" or nonstandard testing techniques.
Focus on adapting assessments for individuals with physical or sensorimotor limitations.

Main Results:

Nonstandard testing strategies can yield more accurate neuropsychological data in elderly individuals with limitations.
Flexible approaches enable the assessment of cognitive functions like naming and executive functions in visually impaired persons.
These methods are vital for evaluating daily life capacity and competence.

Conclusions:

Judicious use of nonstandard testing strategies enhances the accuracy of neuropsychological assessments in older adults with physical or sensorimotor impairments.
Flexible testing methods are essential for a comprehensive understanding of cognitive functioning and daily life competence.
This approach is critical for clinical decision-making regarding capacity and competence in aging individuals.