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Drug Dosing: Geriatric Patients

Drug Dosing: Geriatric Patients

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...

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Metabolism

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Metabolism

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...

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Distribution

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Distribution

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

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Absorption

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...

Pharmacodynamics in Geriatric Patients: Effects of Age

Pharmacodynamics in Geriatric Patients: Effects of Age

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...

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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Polypharmacy in the elderly: maximizing benefit, minimizing harm.

Noel H Ballentine¹

¹Division of General Internal Medicine, Department of Medicine, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA. nballentine@psu.edu

Critical Care Nursing Quarterly

|March 5, 2008

Summary

This summary is machine-generated.

Optimizing medication for seniors is crucial. This review addresses the risks of overprescribing and offers strategies for safe, effective pharmacologic treatment in the elderly population.

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Area of Science:

Geriatrics
Pharmacology
Patient Safety

Background:

Polypharmacy and inappropriate prescribing are significant challenges in elderly care.
These issues contribute to increased healthcare costs, adverse drug events, and patient management errors.

Purpose of the Study:

To define appropriate prescribing practices for the elderly.
To outline the risks associated with overprescribing medications.
To present strategies for achieving optimal prescribing patterns in older adults.

Main Methods:

Systematic review of current understanding of appropriate prescribing.
Discussion of potential hazards of overprescribing.
Outline of practical strategies for optimal prescribing.

Main Results:

Inappropriate prescribing and polypharmacy in the elderly lead to adverse outcomes.
A systematic approach to drug monitoring is vital for appropriate prescribing.
Regular review of medication lists and outcomes is essential.

Conclusions:

Minimizing polypharmacy and maximizing patient safety are key goals.
Optimal prescribing requires consistent attention to medication indications and outcomes.
This review provides practical guidance for caregivers across various healthcare settings.