PMID- 24670388 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20140327 LR - 20211021 IS - 2163-8306 (Print) IS - 2163-8306 (Electronic) IS - 2163-8306 (Linking) VI - 3 IP - 3 DP - 2014 Mar 26 TI - Physiologically based pharmacokinetic modeling framework for quantitative prediction of an herb-drug interaction. PG - e107 LID - 10.1038/psp.2013.69 [doi] AB - Herb-drug interaction predictions remain challenging. Physiologically based pharmacokinetic (PBPK) modeling was used to improve prediction accuracy of potential herb-drug interactions using the semipurified milk thistle preparation, silibinin, as an exemplar herbal product. Interactions between silibinin constituents and the probe substrates warfarin (CYP2C9) and midazolam (CYP3A) were simulated. A low silibinin dose (160 mg/day x 14 days) was predicted to increase midazolam area under the curve (AUC) by 1%, which was corroborated with external data; a higher dose (1,650 mg/day x 7 days) was predicted to increase midazolam and (S)-warfarin AUC by 5% and 4%, respectively. A proof-of-concept clinical study confirmed minimal interaction between high-dose silibinin and both midazolam and (S)-warfarin (9 and 13% increase in AUC, respectively). Unexpectedly, (R)-warfarin AUC decreased (by 15%), but this is unlikely to be clinically important. Application of this PBPK modeling framework to other herb-drug interactions could facilitate development of guidelines for quantitative prediction of clinically relevant interactions.CPT Pharmacometrics Syst. Pharmacol. (2014) 3, e107; doi:10.1038/psp.2013.69; advance online publication 26 March 2014. FAU - Brantley, S J AU - Brantley SJ AD - Eshelman School of Pharmacy, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA. FAU - Gufford, B T AU - Gufford BT AD - College of Pharmacy, Washington State University, Spokane, Washington, USA. FAU - Dua, R AU - Dua R AD - Eshelman School of Pharmacy, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA. FAU - Fediuk, D J AU - Fediuk DJ AD - Eshelman School of Pharmacy, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA. FAU - Graf, T N AU - Graf TN AD - Department of Chemistry and Biochemistry, The University of North Carolina at Greensboro, Greensboro, North Carolina, USA. FAU - Scarlett, Y V AU - Scarlett YV AD - School of Medicine, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA. FAU - Frederick, K S AU - Frederick KS AD - Boehringer Ingelheim Pharmaceuticals, Inc., Ridgefield, Connecticut, USA. FAU - Fisher, M B AU - Fisher MB AD - ProPharma Services, LLC, Oxford, Connecticut, USA. FAU - Oberlies, N H AU - Oberlies NH AD - Department of Chemistry and Biochemistry, The University of North Carolina at Greensboro, Greensboro, North Carolina, USA. FAU - Paine, M F AU - Paine MF AD - College of Pharmacy, Washington State University, Spokane, Washington, USA. LA - eng GR - R01 GM077482/GM/NIGMS NIH HHS/United States GR - UL1 TR000083/TR/NCATS NIH HHS/United States PT - Journal Article DEP - 20140326 PL - United States TA - CPT Pharmacometrics Syst Pharmacol JT - CPT: pharmacometrics & systems pharmacology JID - 101580011 PMC - PMC4042458 EDAT- 2014/03/29 06:00 MHDA- 2014/03/29 06:01 PMCR- 2014/03/01 CRDT- 2014/03/28 06:00 PHST- 2013/08/12 00:00 [received] PHST- 2013/10/28 00:00 [accepted] PHST- 2014/03/28 06:00 [entrez] PHST- 2014/03/29 06:00 [pubmed] PHST- 2014/03/29 06:01 [medline] PHST- 2014/03/01 00:00 [pmc-release] AID - psp201369 [pii] AID - 10.1038/psp.2013.69 [doi] PST - epublish SO - CPT Pharmacometrics Syst Pharmacol. 2014 Mar 26;3(3):e107. doi: 10.1038/psp.2013.69.