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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 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...
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 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...
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 9, 2026

A New Technique for Quantitative Analysis of Hair Loss in Mice Using Grayscale Analysis
06:41

A New Technique for Quantitative Analysis of Hair Loss in Mice Using Grayscale Analysis

Published on: March 9, 2015

Pharmacologic interventions in aging hair.

Ralph M Trüeb1

  • 1Department of Dermatology, University Hospital of Zurich, Zurich, Switzerland. ralph.trueeb@usz.ch

Clinical Interventions in Aging
|November 30, 2007
PubMed
Summary

Hair aging involves shaft weathering, reduced melanocyte function, and decreased production. Current treatments for hair loss include minoxidil and finasteride, while research explores new anti-aging compounds.

Area of Science:

  • Dermatology and Cosmetology
  • Hair Biology
  • Aging Research

Background:

  • Hair appearance significantly impacts self-perception and the desire for youthful looks.
  • The hair care and pharmaceutical industries are developing products and drugs for hair maintenance.
  • Hair aging involves hair shaft weathering, decreased melanocyte function, and reduced hair production.

Purpose of the Study:

  • To review the factors contributing to hair aging.
  • To discuss current and emerging treatments for age-related hair changes.
  • To explore the role of oxidative stress and potential anti-aging interventions.

Main Methods:

  • Review of scientific literature on hair aging mechanisms.
  • Analysis of intrinsic (genetic, epigenetic) and extrinsic (UV radiation, pollution) aging factors.

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Collecting Hair Samples for Hair Cortisol Analysis in African Americans

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  • Examination of current pharmacologic treatments and novel therapeutic strategies.

    • Main Results:

    • Androgenetic alopecia and familial premature graying are key examples of intrinsic hair aging.
    • Topical minoxidil and oral finasteride are established treatments for androgenetic alopecia.
    • Oxidative stress is implicated in hair aging, with antioxidants and photoprotectors as potential topical interventions.

    Conclusions:

    • Hair aging is multifactorial, influenced by genetics, environment, and oxidative stress.
    • While hair colorants address graying, research is ongoing for advanced treatments like liposome targeting for hair follicles.
    • A comprehensive approach combining established therapies and novel agents is crucial for managing hair aging.