Not recommended w/ rifampicin, ketoconazole; itraconazole, voriconazole, clarithromycin, telithromycin, ritonavir, rifabutin. Increased bioavailability w/ ciclosporin. Increased C
max w/ erythromycin, verapamil. Increased C
min w/ octreotide. Atorvastatin, pravastatin. Increased C
max & AUC w/ midazolam. May increase metabolism & decrease blood levels w/ St. John's wort, anticonvulsants (eg, carbamazepine, phenobarb, phenytoin), anti HIV drugs (eg, efavirenz, nevirapine). May increase blood levels w/ fluconazole; verapamil, nicardipine, diltiazem; nelfinavir, indinavir, amprenavir. Increase blood conc w/ Pgp inhibitors. CYP3A4 & CYP2D6 substrates. Live vaccines. Grapefruit & grapefruit juice.