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Related Concept Videos

Pharmacodynamics in Geriatric Patients: Effects of Age01:27

Pharmacodynamics in Geriatric Patients: Effects of Age

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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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Drug Dosing: Geriatric Patients01:15

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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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Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Metabolism01:18

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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Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Distribution01:00

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...
117
Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Absorption01:22

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Absorption

142
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...
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Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Excretion01:18

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Excretion

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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...
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Pharmacological Interactions in the Elderly.

Emilia Błeszyńska1, Łukasz Wierucki2, Tomasz Zdrojewski2

  • 1Department of Occupational, Metabolic and Internal Diseases, Medical University of Gdańsk, 81-519 Gdynia, Poland.

Medicina (Kaunas, Lithuania)
|July 2, 2020
PubMed
Summary

Elderly patients face complex medication challenges due to age, illness, and multiple prescriptions, increasing drug interaction risks. Understanding these interactions is vital for improving patient safety and pharmacotherapy quality in older adults.

Keywords:
agingdrug interactionsgeriatricsmedication errors/prevention and controlmultimorbiditypolypharmacy

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Area of Science:

  • Geriatric Medicine
  • Clinical Pharmacology
  • Patient Safety

Background:

  • Pharmacological therapy in the elderly is complex due to advanced age, multiple comorbidities, and polypharmacy.
  • These factors increase the risk of drug interactions and adverse drug events in older adults.
  • Patient safety is a critical concern in healthcare, with drug interactions representing a significant, avoidable medical error.

Purpose of the Study:

  • To review methods and tools for preventing drug interactions in geriatric pharmacotherapy.
  • To highlight the importance of understanding drug interaction mechanisms and consequences in the elderly.
  • To emphasize the need for a collaborative approach to enhance pharmacotherapy quality in older populations.

Main Methods:

  • Review of existing literature on drug interactions in the elderly.
  • Analysis of pharmacovigilance methods and tools.
  • Examination of the scale of drug interactions in the geriatric population globally.

Main Results:

  • An estimated 1 in 6 elderly patients may experience a significant drug interaction.
  • Knowledge of drug interaction causes and effects is crucial for effective pharmacotherapy planning.
  • Various preventive measures and tools exist for pharmacovigilance.

Conclusions:

  • Drug interactions pose a substantial risk to elderly patients, necessitating specialized attention.
  • Effective pharmacotherapy in geriatrics requires a deep understanding of drug interactions and proactive prevention strategies.
  • A concerted effort by the medical community is essential to improve medication safety and therapeutic outcomes for older adults.