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Clinical Pharmacokinetics
Published in: Clinical Pharmacokinetics 7/2006

01-07-2006 | Original Research Article

Equivalent Pharmacokinetics of the Active Metabolite of Ciclesonide With and Without Use of the AeroChamber Plus™ Spacer for Inhalation

Authors: Dr Anton Drollmann, Ruediger Nave, Volker W. Steinijans, Eugen Baumgärtner, Thomas D. Bethke

Published in: Clinical Pharmacokinetics | Issue 7/2006

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Abstract

Background

Ciclesonide is an inhaled corticosteroid that provides safe and effective control of persistent asthma. Ciclesonide is administered as an aerosol solution in a metered-dose inhaler, using hydrofluoroalkane-134a as a propellant. It is activated in the lung to form its only active metabolite, desisobutyryl-ciclesonide (des-CIC). A spacer may be used in combination with the hydrofluoroalkane metered-dose inhaler (HFA-MDI) to maintain inhaled corticosteroid delivery to the lung in patients with poor inhalation technique.

Objective

To determine if the pharmacokinetics of des-CIC and ciclesonide are altered when a spacer is used for ciclesonide inhalation.

Methods

A randomised, open-label, 2-period crossover, single-center pharma-cokinetic study was conducted in 30 patients with asthma (forced expiratory volume in 1 second ≥70% predicted). A single dose of ciclesonide (320μg exactuator; equivalent to 400μg ex-valve) was administered via the HFA-MDI with and without an AeroChamber Plus™ spacer (Trudell Medical International, London, ON, Canada). Serum concentrations of ciclesonide and des-CIC were measured before inhalation and at various intervals until 14 hours after treatment using high-performance liquid chromatography with tandem mass spectrometric detection.

Results

The pharmacokinetic properties of the active metabolite, des-CIC, were equivalent after inhalation of ciclesonide with and without the AeroChamber Plus™ spacer. Point estimates and 90% confidence intervals (CIs) for the ratio of des-CIC pharmacokinetic properties in the presence or absence of a spacer were within the conventional bioequivalence range of 0.80–1.25 (area under the serum concentration time curve from time zero to infinity 0.96 [0.85, 1.07]; peak serum concentration 1.05 [0.94, 1.18]; elimination half-life 1.04 [0.92, 1.18]). Furthermore, there was no relevant difference in the point estimate and 90% CI of the difference of the time to reach peak serum concentration of des-CIC with or without a spacer.

Conclusion

The AeroChamber Plus™ spacer did not influence the pharmacokinetics of the pharmacologically active des-CIC. Thus, systemic exposure to the active metabolite is similar when ciclesonide is inhaled with or without a spacer. Furthermore, these results are indicative of comparable lung deposition of ciclesonide in both the presence and absence of a spacer.
Footnotes
1
The use of trade names is for product identification purposes only and does not imply endorsement.
 
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Metadata
Title
Equivalent Pharmacokinetics of the Active Metabolite of Ciclesonide With and Without Use of the AeroChamber Plus™ Spacer for Inhalation
Authors
Dr Anton Drollmann
Ruediger Nave
Volker W. Steinijans
Eugen Baumgärtner
Thomas D. Bethke
Publication date
01-07-2006
Publisher
Springer International Publishing
Published in
Clinical Pharmacokinetics / Issue 7/2006
Print ISSN: 0312-5963
Electronic ISSN: 1179-1926
DOI
https://doi.org/10.2165/00003088-200645070-00007

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