Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica

[Effect of different compatibility of tetramethylpyrazine on its pharmacokinetics in vivo].

PMID 22803382


To study the pharmacokinetics of single administration and different compatibility of tetramethylpyrazine (TMP) in rats. Thirty two Sprague-Dawley rats were randomly divided into 4 groups: the TMP (30 mg x kg(-1)) group, the TMP+FA (30 mg x kg(-1) + 50 mg x kg(-1)) group, the TMP+TET (30 mg x kg(-1) mg x kg(-1)) group and the TMP+FA+TET (30 mg x kg(-1) + 50 mg x kg(-1) + 20 mg x kg(-1)) group. After the oral administration, their blood samples were collected to detect plasmas concentrations by HPLC method and to calculate pharmacokinetic parameters DAS 2.0 program. In compatibility with FA, AUC(0-t), Cmax and Tmax showed no significant difference with the single administration of TMP, but t(1/2) and MRT,, were obviously longer than the single administration. In compatibility with TET and FA + TET, AUC (0-t), Cmax and Tmax showed significant increase than the single administration of TMP, whereas t(1/2) and MRT0, did not notably vary from the single administration. FA can prolong TMP's action time in rats, and TET can accelerate TMP's absorption in rats.