Increased plasma conc w/ potent CYP3A4 inhibitor (eg, ketoconazole, itraconazole, ritonavir) & CYP2C9 inhibitor (eg, voriconazole). Decreased blood conc of cyclosporine A. Reduced/decreased plasma conc of tacrolimus, sirolimus. glibenclamide, warfarin, simvastatin. Decreased plasma conc w/ potent CYP2C9 & CYP3A4 inducers eg, rifampicin. Reduced systemic exposure w/ other CYP3A4 inducers eg, carbamazepine, phenobarb, phenytoin, St. John's wort. Reduced clearance w/ lopinavir + ritonavir, other ritonavir-boosted PIs. Additive toxicity w/ nevirapine. Decreased AUC of norethisterone, ethinyl estradiol, sildenafil. Reduced tadalafil systemic exposure. Decreased AUC, C
max & C
min of digoxin.