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Related Concept Videos

Pharmacodynamics in Geriatric Patients: Effects of Age01:27

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 Metabolism01:18

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...
Drug Dosing: Geriatric Patients01:15

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 Absorption01:22

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 Distribution01:00

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 Excretion01:18

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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Related Experiment Video

Updated: Jul 12, 2026

Highlighting and Reducing the Impact of Negative Aging Stereotypes During Older Adults' Cognitive Testing
06:58

Highlighting and Reducing the Impact of Negative Aging Stereotypes During Older Adults' Cognitive Testing

Published on: January 24, 2020

Depression in old age (75+), the PIKO study.

Petronella J van't Veer-Tazelaar1, Harm W J van Marwijk, Aaltje P D Jansen

  • 1Department of General Practice, VU University Medical Centre, Amsterdam, The Netherlands. pj.vantveer@vumc.nl

Journal of Affective Disorders
|August 28, 2007
PubMed
Summary

Depressive symptoms are common in adults aged 75 and older, affecting 31.1% of the population. Risk factors like functional disability and loneliness, not age itself, contribute to this prevalence.

Related Experiment Videos

Last Updated: Jul 12, 2026

Highlighting and Reducing the Impact of Negative Aging Stereotypes During Older Adults' Cognitive Testing
06:58

Highlighting and Reducing the Impact of Negative Aging Stereotypes During Older Adults' Cognitive Testing

Published on: January 24, 2020

Area of Science:

  • Geriatric Medicine
  • Psychiatry
  • Epidemiology

Background:

  • Elderly individuals (75+) are underrepresented in depression studies.
  • Geriatric depression prevalence and risk factors require further investigation.
  • The influence of age and gender on geriatric depression remains unclear.

Purpose of the Study:

  • To assess the prevalence of depressive symptomatology in adults aged 75 years and older.
  • To identify risk indicators associated with depressive symptoms in this demographic.
  • To investigate the role of age and gender in geriatric depression.

Main Methods:

  • Community-based study of 2850 participants aged 75+.
  • Assessed depressive symptoms using the Centre for Epidemiologic Studies Depression scale (CES-D).
  • Employed logistic regression to determine risk indicators (Odds Ratios with 95% confidence intervals).

Main Results:

  • Prevalence of depressive symptoms was 31.1%, higher than in younger elderly samples.
  • An initial bivariate analysis showed a slight increase in depressive symptoms with age (OR 1.05).
  • After controlling for confounding factors, the effects of age and gender on depressive symptoms were no longer significant.

Conclusions:

  • Depressive symptoms are highly prevalent in the elderly population and appear to increase with age.
  • The age-related increase in depression is linked to associated risk factors, not aging itself.
  • Functional disability, loneliness, and fear of falling are key modifiable risk factors for geriatric depression.