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Pharm Res. 2008 Aug;25(8):1807-14. doi: 10.1007/s11095-007-9492-0. Epub 2008 Jan 31.

Effect of silymarin supplement on the pharmacokinetics of rosuvastatin.

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Department of Pharmacology and Pharmacogenomics Research Center, Inje University College of Medicine, 633-165 Gaegum-Dong, Jin-Gu, Busan, 614-735, South Korea.



To evaluate the effect of silymarin on the pharmacokinetics of rosuvastatin in systems overexpressing OATP1B1 or BCRP transporters and in healthy subjects.


The concentration-dependent transport of rosuvastatin and the inhibitory effect of silymarin were examined in vitro in OATP1B1-expressing oocytes and MDCKII-BCRP cells. For in vivo assessment, eight healthy male volunteers, divided into two groups, were randomly assigned to receive placebo or silymarin (140 mg) three times per day for 5 days. On day 4, all subjects received rosuvastatin (10 mg, 8 AM: ) 1 h after the placebo or silymarin administration. A series of blood samples were collected for 72 h, and the plasma concentration of rosuvastatin was determined using LC-MS/MS.


Based on the concentration dependency of rosuvastatin transport in the OATP1B1 and BCRP overexpression systems, rosuvastatin is a substrate for both transporters. Silymarin inhibited both OATP1B1- and BCRP-mediated rosuvastatin transport in vitro (K (i) 0.93 microM and 97 microM, respectively). However, no significant changes in AUC, half-life, Vd/F, or Cl/F of rosuvastatin were observed in human subjects following pretreatment with silymarin.


Silymarin does not appear to affect rosuvastatin pharmacokinetics in vivo, suggesting that silymarin, administered according to a recommended supplementation regimen, is not a potent modulator of OATP1B1 or BCRP in vivo.

[Indexed for MEDLINE]

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