Safety and Pharmacokinetic Studies of Silodosin, a New α1A-Adrenoceptor Selective Antagonist, in Healthy Chinese Male Subjects
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概要
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The objectives of the study were to assess the safety and pharmacokinetics of silodosin capsules in 82 healthy male Chinese subjects. To evaluate the safety after single-dosing escalation, 40 subjects were equally divided into 4 groups (2, 4, 8, 12 mg) by a randomized, double-blind and placebo-controlled design. To assess the pharmacokinetics after single-dosing, 30 subjects were equally divided into 3 groups (4, 8, 12 mg). To assess the safety and pharmacokinetics via multiple-dosing, 12 subjects were included as a group (4 mg once daily at day 1 and day 7; 4 mg twice daily at day 2 through day 6). The safety observations showed that mild adverse events, including postural hypotension, dizziness, and headache, were observed. After single-dosing at doses of 4, 8, and 12 mg, the mean area under the concentration–time curve from 0 to 36 h (AUC0—36) values were 136.82±46.38, 270.17±54.66, and 474.63±108.50 μg/l·h and the mean maximal silodosin concentration in plasma (Cmax) values were 26.70±7.48, 48.47±12.35, and 94.07±22.59 μg/l, respectively. After multiple-dosing, the Cmax value at day 7 was 33.84±19.54 μg/l, and the AUC0—24 value at day 7 was 193.19±68.96 μg/l·h. The accumulation ratio of the AUC value was 1.55 by comparing the multiple-dosing with the single-dosing. It is concluded that silodosin is safe and tolerated in healthy Chinese male subjects at the dosing levels used in this study. The mean Cmax and AUC values of silodosin increased proportionally with dose escalation, showing characteristics of linear pharmacokinetics.
- 公益社団法人 日本薬学会の論文
著者
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Cui Yi-min
Department Of Orthopaedic Surgery Xinhua Hospital Shanghai Second Medical University
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Zhou Ying
Department Of Biotechnology Graduate School Of Engineering Osaka University
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Zhao Xia
Department Of Gynecology And Obstetrics West China Second Hospital West China Medical School Sichuan
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Sun Pei-Hong
Department of Pharmacy, Base for Clinical Trial, Peking University First Hospital
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Liu Yu-Wang
Department of Pharmacy, Base for Clinical Trial, Peking University First Hospital
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Meng Lei
Department of Cardiology, Peking University First Hospital
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Zhao Xia
Department Of Gynecology And Obstetrics Second West China Hospital West China Medical School Sichuan
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Cui Yi-Min
Department of Pharmacy, Base for Clinical Trial, Peking University First Hospital
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Zhou Ying
Department of Pharmacy, Base for Clinical Trial, Peking University First Hospital
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Zhao Xia
Department of Pharmacy, Base for Clinical Trial, Peking University First Hospital
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