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Evaluation of theophylline clearance in children with bronchial asthma

M Yamazaki1, O Fukutomi, N Kondo

  • 1Department of Pediatrics, Gifu University School of Medicine, Japan.

Journal of Investigational Allergology & Clinical Immunology
|January 1, 1995
PubMed

Insights

Theophylline clearance in children with asthma changes with age, peaking around 10 years. Dosage adjustments based on serum levels are crucial for effective treatment in pediatric patients.

Area of Science:

  • Pharmacology
  • Pediatrics
  • Respiratory Medicine

Background:

  • Theophylline is a bronchodilator used for chronic bronchial asthma.
  • Understanding theophylline pharmacokinetics in children is essential for safe and effective dosing.

Purpose of the Study:

  • To investigate the age-dependent changes in total body clearance of theophylline in pediatric asthma patients.
  • To evaluate the impact of age on theophylline pharmacokinetics and identify optimal dosing strategies.

Main Methods:

  • Studied 95 children (6 months to 15 years) with chronic bronchial asthma on sustained-release theophylline.
  • Determined individual total body clearance using a Bayesian forecasting computer model.
  • Analyzed clearance changes across different age groups.

Main Results:

  • Theophylline clearance increased with age up to 10 years.
  • Clearance significantly decreased in children over 10 years old.
  • Highest interpatient variability in clearance was observed between 2-4 years of age.

Conclusions:

  • Pronounced age-dependent differences in theophylline clearance necessitate individualized dosage regimens.
  • Frequent serum concentration monitoring and clinical response assessment are vital for optimizing theophylline therapy in children.
  • Individualized oral dosing ensures therapeutic theophylline levels in pediatric asthma patients.

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