Effects of Schisandra sphenanthera extract on the pharmacokinetics of tacrolimus in healthy volunteers.

Abstract:

AIM:To assess the effect of Schisandra sphenanthera extract (SchE) on the pharmacokinetics of tacrolimus in healthy volunteers. METHODS:Twelve healthy male volunteers were orally treated with SchE, three capsules twice daily for 13 days. Pharmacokinetic investigations of oral tacrolimus administration at 2 mg were performed both before and at the end of the SchE treatment period. Whole blood tacrolimus concentrations were determined by enzyme-linked immunosorbent assay. Estimated pharmacokinetic parameters before and with SchE were calculated with noncompartmental techniques. RESULTS:Following administration of SchE, the average percentage increases of individual increases in AUC, AUMC and C(max) of tacrolimus were 164.2% [95% confidence interval (CI) 70.1, 258.4], 133.1% (95% CI 49.5, 261.3) and 227.1% (95% CI 155.8, 298.4), respectively (P < 0.01 or 0.05). On average, there was a 36.8% (95% CI 13.4, 60.2) increase in tacrolimus t(max) (P < 0.01). The average percentage decreases in CL/F and V/F were 49.0% (95% CI 31.1, 66.9) and 53.7% (95% CI 40.1, 67.4), respectively (P < 0.01). CONCLUSIONS:SchE can increase the oral bioavailability of tacrolimus. The results of this study will add important information to the interaction area between drugs and herbal products.

journal_name

Br J Clin Pharmacol

authors

Xin HW,Wu XC,Li Q,Yu AR,Zhu M,Shen Y,Su D,Xiong L

doi

10.1111/j.1365-2125.2007.02922.x

subject

Has Abstract

pub_date

2007-10-01 00:00:00

pages

469-75

issue

4

eissn

0306-5251

issn

1365-2125

pii

BCP2922

journal_volume

64

pub_type

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