Do not use this medicine if you are also using any of the following: Alfuzosin, atazanavir, cisapride, cobicistat, dapsone, dasatinib, lovastatin, oral midazolam, rifampin, sildenafil, simvastatin, sunitinib, tacrolimus, trazodone, triazolamErgot medicine (including dihydroergotamine, ergonovine, ergotamine, methylergonovine)Medicine for heart rhythm problems (including amiodarone, bepridil, disopyramide, dofetilide, flecainide, lidocaine, propafenone, quinidine)Medicine to treat an infection (including clarithromycin, erythromycin, halofantrine, pentamidine, quinine)Medicine to treat mental illness (including lurasidone, clozapine, haloperidol, pimozide, sertindole, ziprasidone)Phenothiazine medicine (including chlorpromazine, thioridazine)