Decreased exposure w/ strong P-gp (eg, carbamazepine, phenytoin, rifampicin, St. John's wort) & CYP inducers. Increased exposure w/ dual strong CYP3A & P-gp inhibitors eg, itraconazole. Inhibited transport of sensitive P-gp & BCRP substrates. Altered exposure to metformin. Monitor clinical effects of P-gp dependent substrates w/ narrow therapeutic index eg, digoxin.