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Drug Dosing: Geriatric Patients01:15

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

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...
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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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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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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...
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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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[Geriatrics].

Linda Quiaios1, Jean Dumur1, Kristof Major1

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Adequate sleep and regular physical activity can lower mortality and dementia risk. High-dose vitamin D supplements are ineffective for preventing falls and fractures in older adults.

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Area of Science:

  • Gerontology
  • Preventive Medicine
  • Public Health

Background:

  • Sufficient sleep is linked to reduced mortality and dementia risk.
  • Physical activity is crucial for preventing falls and fractures in older adults.
  • Current evidence questions the efficacy and safety of high-dose vitamin D supplementation for fall prevention.

Purpose of the Study:

  • To summarize recent evidence on key health interventions for older adults.
  • To evaluate the role of sleep, physical activity, vitamin D, medication management, and hearing screening.
  • To inform clinical practice and public health recommendations.

Main Methods:

  • Review of recent studies and clinical evidence.
  • Analysis of data on mortality, dementia, falls, fractures, and medication use.
  • Synthesis of findings related to vitamin D supplementation and hearing impairment screening.

Main Results:

  • Regular physical exercise, including at-home activities, is effective in preventing falls and fractures.
  • High-dose vitamin D supplementation is not recommended and may be harmful.
  • Challenges exist in prescribing and deprescribing medications in frail older patients.
  • Statins for primary cardiovascular prevention should be considered only for individuals with a life expectancy over 2.5 years.
  • Screening for hearing impairment remains a topic of ongoing research and debate.

Conclusions:

  • Promoting adequate sleep and regular physical activity are vital for healthy aging.
  • Vitamin D supplementation and routine screening for asymptomatic adults are not advised for fall prevention.
  • Careful consideration of medication management, including deprescribing, is essential for frail older individuals.
  • Further research is needed to clarify the benefits of hearing impairment screening.