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Once a day theophylline; serum concentrations.

V Nerminathan, S A McKenzie

Archives of Disease in Childhood

|August 1, 1984

Summary

This study evaluated a new once-daily theophylline preparation in children with asthma. While peak levels coincided with likely nocturnal wheezing, daily concentration fluctuations were greater than existing treatments.

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Area of Science:

Pharmacology
Pediatric Pulmonology
Clinical Pharmacy

Background:

Asthma management in children often involves theophylline.
Optimizing theophylline dosing is crucial for efficacy and safety.
Novel drug delivery systems aim to improve patient adherence and therapeutic outcomes.

Purpose of the Study:

To assess the 24-hour serum concentration profiles of a new once-daily theophylline preparation in pediatric asthma patients.
To determine the pharmacokinetic characteristics of this novel formulation.
To correlate peak serum concentrations with symptom patterns, specifically nocturnal wheezing.

Main Methods:

A cohort of 15 children with asthma participated in the study.
Serum theophylline concentrations were measured over a 24-hour period.
Pharmacokinetic parameters were analyzed for the new once-daily preparation.

Main Results:

Peak serum theophylline concentrations were observed during the night, coinciding with the typical period of nocturnal wheezing.
The new preparation exhibited greater fluctuations in serum concentrations throughout the day compared to existing theophylline formulations.
The clinical significance of these observed fluctuations requires further investigation.

Conclusions:

The new once-daily theophylline preparation achieves peak concentrations during a critical period for asthma symptom control in children.
The increased daily fluctuation warrants further study to ascertain its clinical impact and safety profile.
This formulation may offer an alternative for once-daily dosing, pending further evaluation of its variability.

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