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[Individually-adjusted dosages of aminophylline in children with bronchial asthma]
E Paditz1, T Gramatté, W Leupold
1Klinik für Kinderheilkunde, Medizinischen Hochschule Carl Gustav Carus, Dresden.
Insights
Achieving optimal theophylline serum concentrations in children with rapid theophylline metabolism requires frequent dosage adjustments. This study demonstrates that pharmacokinetic analysis using just 2-3 blood samples can determine optimal individual theophylline dosages.
Area of Science:
- Pharmacokinetics
- Pediatric Pharmacology
- Clinical Chemistry
Context:
- Theophylline is a bronchodilator used for managing asthma.
- Children with rapid theophylline metabolism often require complex dosage adjustments to achieve therapeutic serum concentrations.
- Current methods for optimizing theophylline dosage can be time-consuming and require frequent monitoring.
Purpose:
- To investigate pharmacokinetic methods for efficiently determining optimal individual theophylline dosages in pediatric asthma patients.
- To reduce the need for extensive dosage corrections and repeated serum concentration monitoring.
- To validate the use of mathematical pharmacokinetic formulas for individual dose optimization.
Summary:
- This study involved 12 pediatric patients (6-18 years) with bronchial asthma who received Aminophyllin.
- Blood samples were collected up to 6 hours post-administration under steady-state conditions.
- Statistical analysis revealed that the biological half-life of theophylline can be accurately determined from just 2-3 blood samples, enabling dosage optimization via simple pharmacokinetic formulas.
Impact:
- Provides a more efficient method for achieving therapeutic theophylline serum concentrations in pediatric patients.
- Reduces the clinical burden associated with empirical dosage adjustments and repeated blood tests.
- Facilitates personalized medicine approaches in pediatric asthma management.
Abstract:
Theophylline concentrations in serum between 10 to 20 micrograms/ml cannot be obtained with usual dosage of theophylline in children with individual very short elimination half time of theophylline. Multiple corrections of dosage and repeated controls of theophylline concentrations in serum are necessary for empirical adjustment of individual optimal dosage. Pharmacokinetic investigations were made to shorten this management. 12 patients with bronchial asthma, 6 to 18 years of age, received 1.5 to 3 tablets of Aminophyllin under conditions of steady state. Blood samples were taken up to 6 hours after oral application. As a result of statistical analysis we found that the biological half time of theophylline could be determined from 2 to 3 blood samples. Estimation of optimal individual dosage is possible by simple mathematical pharmacokinetic formulas.