著者

中園 直子 猪爪 信夫 飛野 幸子 岩奥 玲子 中野 眞汎

出版者

The Japanese Society of Clinical Pharmacology and Therapeutics

雑誌

臨床薬理 (ISSN:03881601)

巻号頁・発行日

vol.16, no.2, pp.401-407, 1985-06-30 (Released:2010-06-28)

参考文献数

27

被引用文献数

1

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The bioavailability of theophylline following administration of two pediatric sustained release tablets (Theona-P® and Theo-Dur®), two crushed sustained release tablets (crushed Theona-P® and crushed Theo-Dur®), and newly developed sustained release granules (E-0686-023, investigational drug) was studied in four volunteers by measuring salivary concentrations. The pharmacokinetic parameters tmax and MRT (mean residence time) for crushed Theona-P® and crushed Theo-Dur® were significantly shorter compared to Theona-P®, Theo-Dur®, and E-0686 granules, but the AUC0-∞ values were not different among them. The results show that each preparation is equivalent in the extent of bioavailability but not in the rate of bioavailability. More frequent administration is required when crushed Theona-P® or crushed Theo-Dur® are taken, and sustained release granules are desirable in children with chronic asthma who cannot swallow tablets.

著者

有森 和彦 河野 ひとみ 近見 和代 岩奥 玲子 中野 眞汎

出版者

一般社団法人 日本医療薬学会

雑誌

病院薬学 (ISSN:03899098)

巻号頁・発行日

vol.13, no.6, pp.361-365, 1987-12-20 (Released:2011-08-11)

参考文献数

4

被引用文献数

3 1

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Serum concentrations of phenytoin and phenobarbital which were administered as the tablet or the powder in epileptic patients were determined by the fluorescence polarization immunoassay method. The serum concentrations of phenytoin administered as the tablet (Hydantol®) were higher than those as the powder (Aleviatin ® fine granules). To investigate the differences in serum levels following administration of each preparation, compliance, dissolution characteristics of the preparations and losses of the powder after operating the dividing and packing machines were investigated. Since phenytoin dissolved from the Hydantol ® tablet more slowly than from the Aleviatin ® fine granules, the differences in dissolution rates of both preparations do not seem to be the cause of higher serum concentrations in patients taking the Hydantol ® tablet.The amount of the powder after operating three types of dividing and packing machines was decreased about 2-8% of the original amount of the powder by adhesion to various dividing sites of the machine. Accordingly, the lower serum concentrations of phenytoin after the administration of the powder may be due to losses of the powder by the adhesion to dividing and packing machine and due to non-compliance.Although there was no significant difference in the serum concentrations of phenobarbital between the tablet (Phenobal ®) and the powder (JP X phenobarbital powder), large variations in the serum concentrations were observed following administration of the powder. In view of the result of questionnaire and bitterness of the drug, a possibility of non-compliance of the powder was considered. Thus, it may be suggested that these factors should be concerned invariations of the serum concentrations.