Relationship between polymorphism and bioavailability of amobarbital in the rabbit.
作者:YURIKO KATO、MAYUMI KOHKETSU
DOI:10.1248/cpb.29.268
日期:——
The effect of the polymorphic form of amobarbital on its bioavailability was examined by measurement of the dissolution rate and in vivo absorption of two forms (Form I and Form II). The dissolution rate of Form II was faster than that of Form I. In in vivo absorption experiments using rabbits, two crystal forms of amobarbital were administered orally and the resulting blood level-time curves were compared with the dissolution rates. It appeared that the polymorphic form of the drug appreciably affected the absorption process from the digestive tract. Hydroxyamobarbital was confirmed to be the main metabolite of amobarbital.
通过测量两种形态(I型和II型)的溶解率和体内吸收率,研究了异戊巴比妥的多态形式对其生物利用度的影响。II型的溶解率比I型快。在用兔子进行的体内吸收实验中,两种异戊巴比妥晶体形态经口服后,将所得的血药浓度-时间曲线与溶解率进行了比较。结果表明,药物的多态形式明显影响了消化道的吸收过程。羟基异戊巴比妥被证实是异戊巴比妥的主要代谢产物。