Concomitant use w/ anastrozole, griseofulvin, pimozide, pirfenidone. Increased level of aripiprazole, benzodiazepines, corticosteroids, CYP1A2 substrates (eg, lomitapide, pimozide, pirfenidone, ropinirole, selegiline), theophylline derivatives, tipranavir, tizanidine, tranexamic acid, voriconazole. Increased level w/ ascorbic acid, boceprevir, cobicistat, mifepristone, NSAID, voriconazole. Decreased level of anastrozole, chenodiol, hyaluronidase, lamotrigine, thyroid product, ursodiol, vit K antagonists. Decreased level w/ acitretin, aminoglutethimide, aprepitant, armodafinil, artemether, barbiturate, bexarotene, bile acid sequestrants, boceprevir, bosentan, carbamazepine, clobazam, cobicistat, colesevelam, deferasirox, elvitegravir, exenatide, felbamate, fosaprepitant, fosphenytoin, griseofulvin, lamotrigine, mifepristone, modafinil, mycophenolate, nafcillin, nevirapine, oxcarbazepine, perampanel, phenytoin, PIs, prucalopride, retinoic acid & rifamycin derivatives, rufinamide, St. John's wort, telaprevir, tipranavir, tocilizumab, topiramate.