TABLE 6

In vitro cleavage rates correlated with observed in vivo changes in exposure

DrugNormalized Rate of MetabolismFold-Increase in CmaxFold-Increase in AUC
ml/IU per minute
Fosphenytoin to phenytoin33.003.72.1
Clindamycin phosphate to clindamycin2.011.02.3
Ritonavir phosphate to ritonavir<0.19No exposure
Ritonavir oxymethyl phosphate to ritonavir1.761.92.5
Dexamethasone phosphate to dexamethasone13.5913.52.1