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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...

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 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...

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 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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Updated: May 31, 2026

Oral Health Assessment by Lay Personnel for Older Adults

Oral Health Assessment by Lay Personnel for Older Adults

Published on: February 2, 2020

Prescribing for older adults.

Manpreet K Boparai¹, Beatriz Korc-Grodzicki

¹Memorial Sloan-Kettering Cancer Center, New York, NY, USA.

The Mount Sinai Journal of Medicine, New York

|July 13, 2011

Summary

Managing medications for older adults is complex due to physiological changes and multiple health issues. Optimizing pharmacotherapy requires careful consideration of drug interactions, patient factors, and adherence to minimize risks and improve outcomes.

Area of Science:

Geriatrics
Clinical Pharmacology
Health Services Research

Background:

Pharmacotherapy in the elderly is complicated by age-related physiological changes, comorbidities, polypharmacy, and multiple healthcare providers.
Altered pharmacokinetics and pharmacodynamics in older adults, alongside cognitive and functional challenges, impact drug efficacy and safety.
Older adults with chronic conditions benefit from guidelines but face increased toxicity risks from complex drug regimens and potential adverse drug reactions.

Purpose of the Study:

To highlight the complexities of pharmacotherapy in the elderly population.
To emphasize the importance of minimizing adverse drug reactions and drug interactions in older patients.
To underscore the need for a holistic approach to prescribing for elderly individuals.

Main Methods:

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Oral Health Assessment by Lay Personnel for Older Adults

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Review of age-related physiological changes affecting drug handling and response.
Analysis of factors contributing to medication errors and non-adherence in older adults.
Identification of potentially inappropriate medications (PIMs) as a key cause of adverse drug reactions.

Main Results:

Potentially inappropriate medications are a significant cause of adverse drug reactions in the elderly, independent of the number of drugs used.
Adverse drug reactions can often be predicted based on drug pharmacology and may be avoidable.
Elderly medication adherence is influenced by medical, personal, economic factors, cognitive status, and physician relationship.

Conclusions:

Appropriate prescribing for the elderly necessitates considering pharmacological properties alongside clinical, social, cultural, and economic factors.
Patient education and detection of non-adherence are crucial for effective treatment and improved medication adherence.
Prescribing decisions must incorporate life expectancy and patient-centered goals of care for optimal geriatric pharmacotherapy.