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Related Concept Videos

Drug Dosing: Geriatric Patients01:15

Drug Dosing: Geriatric Patients

392
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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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 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...
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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

849
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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Common GI Drug Interactions in the Elderly.

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Elderly patients with gastrointestinal conditions require careful medication review due to polypharmacy risks. Understanding drug-drug interactions is crucial for safe prescribing and preventing adverse drug reactions in this population.

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Area of Science:

  • Geriatric Medicine
  • Pharmacology
  • Gastroenterology

Background:

  • Polypharmacy is prevalent in elderly patients with chronic conditions, increasing morbidity.
  • Gastrointestinal (GI) disorders are common in the elderly, often managed with multiple medications.
  • Safe prescribing necessitates a thorough understanding of drug-drug interactions (DDIs).

Purpose of the Study:

  • To raise awareness of critical DDIs involving commonly prescribed GI medications in the elderly.
  • To emphasize individualized treatment strategies considering pharmacokinetics and DDIs.
  • To highlight the importance of regular reevaluation of medication indications and duration in the elderly.

Main Methods:

  • Review of common gastrointestinal conditions in the elderly.
  • Identification of frequently used medications for these conditions.
  • Analysis of known drug-drug interactions relevant to geriatric patients.

Main Results:

  • Specific GI conditions discussed include GERD, peptic ulcer disease, gastroparesis, diarrhea, constipation, IBS, IBD, and chronic liver disease.
  • Commonly prescribed medications for these conditions present significant DDI risks.
  • Individualized treatment, low-dose initiation, and careful titration are essential.

Conclusions:

  • Awareness of DDIs is paramount for safe medication management in elderly patients with GI issues.
  • Tailoring pharmacotherapy to individual pharmacokinetic profiles and known DDIs is vital.
  • Preventing polypharmacy and adverse drug reactions requires vigilant monitoring and reevaluation of treatment in the elderly.