Concomitant use w/ anastrozole, conivaptan, pimozide, pirfenidone. Increased effects of aripiprazole, benzodiazepines, corticosteroids, CYP1A2 substrates, HMG-CoA reductase inhibitors, lomitapide, pimozide, pirfenidone, ropinirole, selegiline, theophylline derivatives, tipranavir, tizanidine, tranexamic acid, voriconazole. Increased level w/ ascorbic acid, conivaptan, strong & moderate CYP3A4 inhibitors, ivacaftor, mifepristone, NSAID (COX-2 inhibitor), voriconazole. Decreased effects of anastrozole, chenodiol, CYP1A2 & CYP2E1 substrates, hyaluronidase, lamotrigine, thyroid products, ursodiol, vit K antagonists. Decreased level w/ aminoglutethimide, aprepitant, armodafinil, artemether, barbiturates, bexarotene, bile acid sequestrants, boceprevir, bosentan, carbamazepine, clobazam, cobicistat, colesevelam, strong CYP3A4 inducers, deferasirox, elvitegravir, exenatide, felbamate, fosaprepitant, fosphenytoin, griseofulvin, mifepristone, modafinil, mycophenolate, nafcillin, nevirapine, oxcarbazepine, phenytoin, PIs, prucalopride, retinoic acid & rifamycin derivatives, rufinamide, St. John's wort, telaprevir, tipranavir, tocilizumab, topiramate.