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Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Excretion

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Excretion

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...

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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...

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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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Related Experiment Video

Updated: Jun 11, 2026

Preparation of Acute Hippocampal Slices from Rats and Transgenic Mice for the Study of Synaptic Alterations during Aging and Amyloid Pathology

Preparation of Acute Hippocampal Slices from Rats and Transgenic Mice for the Study of Synaptic Alterations during Aging and Amyloid Pathology

Published on: March 23, 2011

Electrolytes in the aging.

Lynn E Schlanger¹, James L Bailey, Jeff M Sands

¹Emory University, Atlanta, GA 30322, USA.

Advances in Chronic Kidney Disease

|July 9, 2010

Summary

This summary is machine-generated.

As people age, kidney function declines, increasing risks for electrolyte imbalances like hypernatremia and hyponatremia. Awareness of these age-related kidney changes is crucial for preventing adverse outcomes in the elderly population.

Related Experiment Videos

Last Updated: Jun 11, 2026

Preparation of Acute Hippocampal Slices from Rats and Transgenic Mice for the Study of Synaptic Alterations during Aging and Amyloid Pathology

Preparation of Acute Hippocampal Slices from Rats and Transgenic Mice for the Study of Synaptic Alterations during Aging and Amyloid Pathology

Published on: March 23, 2011

Area of Science:

Gerontology
Nephrology
Internal Medicine

Background:

The U.S. elderly population is rapidly expanding, projected to double by 2050.
Aging is associated with degenerative changes in organs, including the kidneys.
Kidney function declines after age 40, marked by increased glomerulosclerosis and reduced filtration rates.

Purpose of the Study:

To highlight age-related kidney changes and their impact on electrolyte balance in the elderly.
To underscore the prevalence and risks of hypernatremia and hyponatremia in older adults.
To emphasize the importance of recognizing potential electrolyte abnormalities in this demographic.

Main Methods:

Review of physiological changes in the aging kidney.
Analysis of common electrolyte disturbances in the elderly.
Discussion of factors jeopardizing water and electrolyte balance.

Main Results:

Aging kidneys exhibit reduced ability to concentrate or dilute urine and excrete electrolytes.
Hypernatremia and hyponatremia are common electrolyte abnormalities in the elderly, linked to high mortality.
Normal water and electrolyte balance in the elderly can be compromised by illness, cognitive decline, and medications.

Conclusions:

Age-related kidney alterations predispose the elderly to significant electrolyte imbalances.
Prompt recognition and management of hypernatremia and hyponatremia are vital for reducing mortality in older adults.
Vigilance regarding factors affecting fluid and electrolyte homeostasis is essential for preventing adverse health outcomes in the aging population.