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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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Neural Regulation01:37

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Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.
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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

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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 Absorption01:22

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

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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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Related Experiment Video

Updated: Dec 29, 2025

Targeting Alpha Synuclein Aggregates in Cutaneous Peripheral Nerve Fibers by Free-floating Immunofluorescence Assay
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[Polyneuropathy in older individuals].

W N Löscher1, B Iglseder2

  • 1Universitätsklinik für Neurologie, Medizinische Universität Innsbruck, Anichstr. 35, 6020, Innsbruck, Österreich. wolfgang.loescher@i-med.ac.at.

Der Internist
|February 8, 2020
PubMed
Summary
This summary is machine-generated.

Peripheral neuropathies are distinct from aging changes, affecting up to 7% of the elderly. Early diagnosis and management are crucial for mobility and fall prevention in older adults.

Keywords:
AgingDiabetic neuropathiesMonoclonal gammopathy of undetermined significancePeripheral nervous systemPolyneuropathy, axonal, idiopathic, chronic

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Area of Science:

  • Neurology
  • Geriatrics
  • Peripheral Nervous System Disorders

Background:

  • Aging causes peripheral nervous system changes like decreased reflexes and proprioception.
  • Polyneuropathies are distinct diseases, not solely age-related, with varied etiologies.
  • Prevalence increases with age, particularly for diabetes, malignancy, and monoclonal gammopathy-related neuropathies.

Purpose of the Study:

  • To differentiate age-associated nervous system changes from polyneuropathies.
  • To highlight the increased prevalence and specific etiologies of polyneuropathies in the elderly.
  • To emphasize the importance of functional assessment and systematic diagnosis in older patients.

Main Methods:

  • Systematic diagnostic approach including history, clinical examination, neurophysiology, and laboratory tests.
  • Distinguishing polyneuropathies from normal aging processes.
  • Assessing functional abilities to guide management.

Main Results:

  • Polyneuropathy incidence is ~118/100,000, with prevalence up to 7% in the elderly.
  • Common etiologies in older adults include metabolic disorders, inflammatory conditions, systemic diseases, and vasculitis.
  • Cryptogenic neuropathies increase with age, complicating diagnosis.

Conclusions:

  • Polyneuropathies significantly impair mobility and increase fall risk in the elderly.
  • Identifying the underlying cause through a systematic approach is essential.
  • Treatment involves addressing the underlying condition, managing neuropathic pain, and utilizing physiotherapy and rehabilitation.