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[Pharmacokinetics of antimicrobial agents in the elderly]
Abstract:
The elderly can be easily infected by certain organisms due to underlying diseases and complications. The pharmacokinetics of cefotiam, ceftriaxone, ceftizoxime, cefpodoxime proxetil, carumonam, clarithromycin, amikacin, ofloxacin and lomefloxacin in the elderly should be considered when choosing antibiotics for elderly patient with regard to infected site, causative organisms, pharmacokinetics and side effects. Pharmacokinetics in the elderly reflect potential renal dysfunction, so that t1/2 was elongated and AUC increased with age. Intravenous administration in the elderly, especially in the subjects with low body weight, the administered dose and intervals must be considered. With oral administration there was no constant tendency of the intestinal absorption.
Insights
Elderly patients require careful antibiotic selection due to altered pharmacokinetics. Age-related changes, like renal dysfunction, impact drug efficacy and safety, necessitating dose adjustments for intravenous and oral antibiotics.
Area of Science:
- Geriatric Medicine
- Infectious Diseases
- Clinical Pharmacology
Background:
- Elderly individuals are susceptible to infections due to comorbidities.
- Age-related physiological changes affect drug metabolism and excretion.
Purpose of the Study:
- To review the pharmacokinetics of various antibiotics in the elderly.
- To guide antibiotic selection and dosing in geriatric patients.
Main Methods:
- Literature review of pharmacokinetic data for selected antibiotics.
- Analysis of age-related changes in drug absorption, distribution, metabolism, and excretion.
Main Results:
- Antibiotic half-life (t1/2) is often prolonged, and area under the curve (AUC) increased with age.
- Renal dysfunction in the elderly significantly impacts pharmacokinetic parameters.
- Intravenous dosing requires consideration of body weight and administration intervals.
- Oral absorption showed no consistent pattern in the elderly.
Conclusions:
- Pharmacokinetic considerations are crucial for effective and safe antibiotic therapy in the elderly.
- Individualized dosing strategies are necessary, accounting for age, renal function, and route of administration.
- Further research into oral antibiotic absorption in geriatric populations is warranted.