TABLE 4

Predicted versus observed AUC ratios (AUCI/AUC) calculated with the in vitro-based model and in vivo information-guided prediction approach

In vitro (P), only the data of the parent drugs were included in the in vitro-based prediction approach and total systemic Cmax was used to estimate perpetrator concentration available to the enzyme; in vitro (P + M), both the data of the parent drug and metabolites were included in the in vitro-based prediction approach; in vitro UHI (P + M), unbound hepatic inlet concentration was used to estimate perpetrator concentration available to the enzyme.

Inhibitors (Parent Drug)Inhibitors (Metabolites)Inhibitor DoseVictim DrugP450Observed AUCI/AUCPredicted AUCI/AUCReferences for Observed AUCI/AUC
In Vitro (P)In Vitro (P + M)In Vitro UHI (P + M)IVIP
mg/kg
CasopitantHydroxycasopitant30Midazolam3A1.761.361.411.311.74Zamuner et al., 2010
DiltiazemN-Desmethyldiltiazem240Midazolam3A3.88a1.38/15.99b1.56/20.73b1.59/22.98b3.91Backman et al., 1994; Zhang et al., 2009b
ErythromycinN-Desmethyl erythromycin1500Midazolam3A4.12a1.57/22.23b1.57/23.41b1.63/23.09b4.72Olkkola et al., 1993; Zimmermann et al., 1996
ItraconazoleHydroxyitraconazole200Midazolam3A7.86a19.5221.3413.618.93Olkkola et al., 1994, 1996; Backman et al., 1998
ItraconazoleHydroxyitraconazole200Simvastatin3A18.61110.66149.8447.3818.26Neuvonen et al., 1998
RanolazineO-Desmethylranolazine2000Simvastatin3A1.592.722.793.661.24Jerling et al., 2005
BupropionErythrohydrobupropion, hydroxybupropion, threohydrobupropion150Desipramine2D65.211.031.761.466.67Reese et al., 2008
FluoxetineNorfluoxetine20Desipramine2D64.422.093.291.474.67Preskorn et al., 1994
QuinidineQuinidine N-oxide, 3-hydroxyquinidine50cDesipramine2D63.145.275.295.642.64Ayesh et al., 1991
SertralineN-Desmethylsertraline50Desipramine2D61.30a1.001.011.001.54Preskorn et al., 1994; Alderman et al., 1997
SertralineN-Desmethylsertraline150Imipramine2D61.681.001.011.001.26Kurtz et al., 1997
VenlafaxineN-Desmethylvenlafaxine150Imipramine2D61.281.001.001.121.17Albers et al., 2000
AmiodaroneN-Desethylamiodarone200Phenytoin2C91.401.011.361.021.30Nolan et al., 1989
SulfinpyrazoneSulfinpyrazone sulfide, Sulfinpyrazone sulfone400S-Warfarin2C91.82a1.162.241.011.49O'Reilly, 1982; Toon et al., 1986
  • a An algebraic mean of the observed AUCI/AUC was used if multiple studies are reported for a single combination of substrate and inhibitor (same dose of inhibitor was used in these studies).

  • b The data on the left were calculated based on the reversible inhibition model, whereas the data on the right were based on the irreversible inhibition model.

  • c Single dose of quinidine was administrated to the subjects in this study.