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[Pediatric pharmacology of azlocilin (author's transl)]
Insights
Azlocillin pharmacokinetics vary by age, with longer serum half-lives in newborns. Clinical use showed better outcomes for urinary tract infections than respiratory infections due to bacterial persistence.
Area of Science:
- Pharmacology
- Microbiology
- Pediatrics
Context:
- Acylureido-penicillin pharmacokinetics, specifically azlocillin, exhibit age-dependent variability.
- Significant differences in serum half-life were observed between newborns (2.56 hours) and school children (0.94 hours).
Purpose:
- To investigate the pharmacokinetics of azlocillin across different pediatric age groups.
- To evaluate the clinical efficacy and tolerance of azlocillin in treating bacterial infections in children.
Summary:
- Pharmacokinetic studies revealed prolonged azlocillin serum half-life in newborns compared to older children.
- Clinical application in 29 patients with Pseudomonas aeruginosa and Proteus mirabilis infections demonstrated varied efficacy.
- Urinary tract infections responded better to azlocillin than respiratory tract infections, possibly due to bacterial persistence in bronchial secretions.
Impact:
- Provides crucial pharmacokinetic data for age-specific azlocillin dosing in pediatric populations.
- Highlights potential challenges in treating respiratory infections due to bacterial persistence despite effective drug levels.
- Suggests azlocillin is well-tolerated in pediatric patients.
Abstract:
Pharmacokinetic investigations of acylureido-penicillins azlocillin in newborns, infants and school shildren showed age dependend results. The differences were especially evident in a prolongation of the serum half-life to 2,56 hours in newborns compared to 0.94 hours in school children. On the basis of our pharmacokinetic results and of the dosages resulting from the data the antibiotic was used clinically in twenty eight patients with Pseudomonas aeruginosa infections and one patient with a Proteus mirabilis infection. The results were much better in infections of the urinary tract than in infections of the respiratory tract. This might be due to an observe bacterial presistence in spite of highly effective levels of azlocillin in bronchial secretion. The tolerance to the antibiotic was good.