Absorption & subsequent elimination may be influenced by medicinal products that affect CYP3A4 &/or Pgp. Increased clearance, decreased C
max & AUC w/ rifampicin. Increased C
max & AUC w/ ketoconazole, erythromycin, verapamil. Increased bioavailability w/ ciclosporin. Increased C
min of octreotide. Increased C
max & AUCinf of midazolam. Increased metabolism & decreased blood levels w/ St. John's wort, anticonvulsants (eg, carbamazepine, phenobarb, phenytoin), anti HIV drugs (eg, efavirenz, nevirapine). Increased risk of angioedema w/ ACE inhibitors. Increased blood levels w/ antifungals (eg, fluconazole), Ca-channel blockers (eg, nicardipine, diltiazem) & PIs (eg, nelfinavir, indinavir, amprenavir). Decreased efflux & increased blood conc w/ P-gp inhibitors. Increased conc of CYP3A4 & CYP2D6 substrates w/ narrow therapeutic index. May affect response w/ live vaccines. Avoid grapefruit & grapefruit juice.