Increased risk of QT interval prolongation w/ mesoridazine, thioridazine, piperaquine, dronedarone, cisapride, pimozide, ziprasidone, bepridil, amifampridine, terfenadine, sparfloxacin, hydroxychloroquine, zuclopenthixol, fluoxetine, metronidazole, anagrelide, selected gonadotropin releasing hormone agonists, clozapine, escitalopram, moxifloxacin, dabrafenib, tizanidine, pasireotide, ivabradine, panobinostat, pitolisant, vinflunine, amiodarone, pimavanserin, tacrolimus, crizotinib, levofloxacin, quetiapine, aripiprazole, sevoflurane, delamanid, bedaquiline & QT interval prolonging drugs. Increased plasma conc w/ ketoconazole, atazanavir, fosamprenavir, saquinavir, itraconazole, ritonavir, nelfinavir, idelalisib, boceprevir, telaprevir, tipranavir, indinavir, cobicistat, diltiazem, cyclosporine, delavirdine, erythromycin, nefazodone, voriconazole, imatinib, amprenavir, quinupristin/dalfopristin, cimetidine. Increased exposure & risk of Torsades de Pointes w/ lopinavir/ritonavir, fluconazole, protriptyline, amoxapine, toremifene. Increased plasma conc & risk of QT interval prolongation w/ posaconazole, telithromycin, clarithromycin, salmeterol, granisetron, azithromycin, trimipramine, astemizole, perflutren lipid microsphere, chlorpromazine, dasatinib, clomipramine, gatifloxacin, trifluoperazine, flecainide, propafenone, vandetanib, ranolazine, mefloquine, telavancin, trazodone, domperidone, ciprofloxacin, Na phosphate, ondansetron, pazopanib, haloperidol, dofetilide, ofloxacin, lapatinib, asenapine, ibutilide, fingolimod, apomorphine, chloroquine, sorafenib, paliperidone, gemifloxacin, artemether/lumefantrine, tetrabenazine, nortriptyline, disopyramide, prochlorperazine, citalopram, procainamide, amitriptyline, desipramine, norfloxacin, quinine, quinidine, vemurafenib, imipramine, sunitinib, dolasetron, arsenic trioxide, promethazine, droperidol, solifenacin, iloperidone, halofantrine; nilotinib. Increased risk of serious & life-threatening reactions w/ darunavir. Increased risk of Torsade de Pointes w/ amisulpride, sulpiride & QT prolonging agents. Potentiated hypotensive effects w/ tadalafil; vardenafil, sildenafil, α
1-adrenergic blockers. Increased risk of QT interval prolongation & Torsades de Pointes w/ donepezil & QT prolonging agents. Increased exposure of CYP3A4 substrates w/ nilotinib & other CYP3A4 substrates prolonging QT interval. Exaggerated hypotension response w/ α
1- & β-adrenergic blockers. Increased risk of hypotension w/ avanafil. Reduced effectiveness w/ yohimbine, ma huang & α
1-adrenergic blockers.