Comparative pharmacokinetics and bioavailability of flavonoid glycosides of Ginkgo biloba after a single oral administration of three formulations to healthy volunteers.

J Wójcicki, B Gawrońska-Szklarz, W Bieganowski, M Patalan, H K Smulski, L Samochowiec, J Zakrzewski
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Abstract

Eighteen healthy volunteers received three different formulations of Ginkgo biloba: capsules (A) and drops (B) (delivered by Agon Pharma), and tablets (C) (Tebonin-Dr. W. Schwabe) in equal an quantity, orally as a single dose, at an interval of at least five days. The pharmacokinetic parameters of the most important flavonoid glycosides: quercetin, kaempferol and isorhamnetin were established. The bioavailability was estimated using capsules as a standard formulation. Only the time to reach the peak concentration (tmax) of quercetin, kaempforol and isorhamnetin administered in the form of capsules, was significantly prolonged as compared with drops and tablets. Area under the curve (AUC) was the largest for formulation B for all the evaluated flavonoid glycosides, however the differences were not statistically significant. It is concluded that the three formulations of Ginkgo biloba extract are bioequivalent.

健康志愿者单次口服三种制剂后银杏黄酮苷的比较药代动力学和生物利用度。
18名健康志愿者接受了三种不同配方的银杏叶:胶囊(A)和滴剂(B)(由Agon Pharma提供)和片剂(C) (Tebonin-Dr。W. Schwabe),等量单次口服,间隔至少5天。建立了槲皮素、山奈酚和异鼠李素三种主要黄酮类苷的药动学参数。以胶囊作为标准制剂,对其生物利用度进行了评价。只有槲皮素、山奈福尔和异鼠李素以胶囊形式给药,达到峰值浓度(tmax)的时间比滴剂和片剂明显延长。曲线下面积(AUC)以配方B最大,但差异无统计学意义。结果表明,银杏叶提取物的三种配方具有生物等效性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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