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Related Concept Videos

Drug Dosing: Geriatric Patients01:15

Drug Dosing: Geriatric Patients

395
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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Clinical Significance of Antibiotic Resistance01:25

Clinical Significance of Antibiotic Resistance

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Methicillin-resistant Staphylococcus aureus (MRSA) presents a critical public health threat, arising from its capacity to resist β-lactam antibiotics due to acquisition of the mecA gene within the staphylococcal cassette chromosome mec (SCCmec). This gene encodes penicillin-binding protein 2a (PBP2a), which impairs binding efficacy of methicillin and other β-lactams. MRSA has evolved into distinct clonal lineages impacting humans and animals alike, reinforcing its significance within...
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Pharmacodynamics in Geriatric Patients: Effects of Age01:27

Pharmacodynamics in Geriatric Patients: Effects of Age

367
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...
367
Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Absorption01:22

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Absorption

861
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...
861
Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Metabolism01:18

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Metabolism

400
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...
400
Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Distribution01:00

Pharmacokinetics in Geriatric Patients: Effect of Age on Drug Distribution

382
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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[Elderly patients suffer more from side effects and resistant microorganisms].

Jenny Dahl Knudsen1, Niels Frimodt-Møller

  • 1Klinisk Mikrobiologisk Afdeling, Hvidovre Hospital, Kettegaard Alle 30, 2650 Hvidovre. inge.jenny.dahl.knudsen@regionh.dk

Ugeskrift for Laeger
|March 18, 2014
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Summary

Antibiotic therapy in older adults presents unique challenges due to organ function decline and drug interactions. Careful microbiological sampling before treatment is essential, as adverse effects increase with age.

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Area of Science:

  • Geriatric Medicine
  • Infectious Diseases
  • Pharmacology

Context:

  • Elderly patients often have reduced renal and organ function, increasing risks associated with antibiotic use.
  • Prior hospitalizations, previous antibiotic exposure, and institutional living heighten the risk of colonization with antibiotic-resistant microorganisms in older adults.
  • The aging process can increase the susceptibility to adverse drug events, including those from antibiotics.

Purpose:

  • To highlight the specific challenges and considerations for antibiotic treatment in the elderly population.
  • To emphasize the importance of microbiological diagnostics prior to initiating antibiotic therapy in geriatric patients.
  • To inform healthcare providers about age-related factors influencing antibiotic efficacy and safety.

Summary:

  • Antibiotic treatment for elderly individuals requires careful consideration of physiological changes and potential drug interactions.
  • Pre-treatment microbiological sampling is critical to guide appropriate antibiotic selection and manage potential resistance.
  • While adverse effects are more common in older adults, the fundamental efficacy and optimal duration of antibiotic therapy are generally not age-dependent.

Impact:

  • Improved patient outcomes through optimized antibiotic selection and administration in elderly patients.
  • Reduced incidence of adverse drug reactions and antibiotic resistance in geriatric populations.
  • Enhanced clinical decision-making for healthcare professionals managing infections in older adults.