Abstract | BACKGROUND: METHODS: Plasma concentrations of beclomethasone 17-monopropionate (17-BMP),a major metabolite of BDP, following an inhaled dose of HFA-BDP (200 microg as four inhalations from 50 microg/actuation) in five Japanese children with bronchial asthma were quantified and analyzed by a non-compartmental analysis to obtain pharmacokinetic parameters. RESULTS: The area under the concentration-time curve from time zero to the last quantifiable time (AUC(0-t)) was 1659 +/- 850 pg x h/mL (arithmetic mean +/- standard deviation (SD)), the maximum concentration observed (C(max)) was 825 +/- 453 pg/mL and the apparent elimination half-life (t(1/2)) was 2.1 +/- 0.7 hours. The time to reach Cmax Tmax was 0.5 hours in all patients. No special relationship was observed between these parameters and age or body weight. These parameters were compared with the previously reported parameters of American children with bronchial asthma. The Japanese/American ratio of the geometric means of each parameter was 1.36 for AUC(0-t), 1.04 for Cmax and 1.4 for t(1/2). The median of Tmax was 0.5 hours in American patients as well as Japanese patients. CONCLUSIONS: The pharmacokinetics of HFA-BDP in Japanese children with bronchial asthma are reported for the first time and a similarity to those in American children is suggested.
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Authors | Takahide Teramoto, Toshiyuki Fukao, Yoshiko Tomita, Yoshiaki Terauchi, Kaori Hosoi, Eiko Matsui, Minako Aoki, Naomi Kondo, Haruki Mikawa |
Journal | Allergology international : official journal of the Japanese Society of Allergology
(Allergol Int)
Vol. 55
Issue 3
Pg. 317-20
(Sep 2006)
ISSN: 1323-8930 [Print] England |
PMID | 17075274
(Publication Type: Comparative Study, Journal Article)
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Chemical References |
- Aerosol Propellants
- Anti-Asthmatic Agents
- Hydrocarbons, Fluorinated
- Beclomethasone
- apaflurane
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Topics |
- Adolescent
- Aerosol Propellants
- Anti-Asthmatic Agents
(pharmacokinetics)
- Asthma
(drug therapy)
- Beclomethasone
(pharmacokinetics)
- Child
- Female
- Humans
- Hydrocarbons, Fluorinated
- Japan
- Male
- United States
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