Avoid concomitant use w/ conivaptan, systemic cyclosporine & fusidic acid, gemfibrozil, idelalisib, pazopanib, posaconazole, red rice yeast, telaprevir, tipranavir. May increase levels/effects of aliskiren, aripiprazole, cimetidine, daptomycin, digoxin, diltiazem, dofetilide, flibanserin, hydrocodone, systemic ketoconazole, lomitapide, midazolam, nimodipine, pazopanib, pimozide, repaglinide, spironolactone, trabectedin, verapamil. Increased levels/effects w/ acipimox, amiodarone, aprepitant, asunaprevir, systemic azithromycin, cyclosporine, erythromycin, fusidic acid & ketoconazole, bezafibrate, boceprevir, ciprofibrate, clarithromycin, cobicistat, colchicine, conivaptan, moderate/strong CYP3A4 inhibitors, cyproterone, danazol, dasatinib, diltiazem, dronedarone, elbasvir, eltrombopag, fenofibrate & derivatives, fluconazole, fosaprepitant, gemfibrozil, grapefruit juice, idelalisib, itraconazole, ivacaftor, mifepristone, netupitant, niacin, niacinamide, ombitasvir, paritaprevir, ritonavir, dasabuvir, palbociclib, P-gp/ABCB 1 inhibitors, posaconazole, PIs, quinine, raltegravir, ranolazine, red yeast rice, rupatadine, simeprevir, stiripentol, telaprevir, telithromycin, teriflunomide, tipranavir, verapamil, voriconazole. May decrease levels/effects of dabigatran etexilate, lanthanum. Decreased levels/effects w/ antacid, systemic bexarotene, bile acid sequestrants, bosentan, moderate/strong CYP3A4 inducers, dabrafenib, deferasirox, efavirenz, etravirine, fosphenytoin, mitotane, phenytoin, rifamycin derivatives, siltuximab, St. John's wort, tocilizumab. Increased serum conc w/ grapefruit juice.